A Bloody Mess
Update Feb 4, 2011: I wrote up a number of ideas for solutions in this blog post. And I wrote up my final mods in this post.
Before plunging into the details, here’s the abbreviated version: the Epiphone Riviera P93 guitar has 3 pickups and 3-way selector switch. There’s no way to turn off the middle pot other than turning it all the way down. Because of this, the volume pots must be wired with independent (aka decoupled) wiring, which results in bad treble loss when turning down. And because of this wiring, there’s no way to use a treble bleed cap since turning down one will result in loss of high frequencies in the other. This problem can be avoided on a typical two pickup 3-way switch (traditional Les Paul style) guitar since it can use non-indendent (coupled) volume wiring. Read on for details…
A few days ago, I realized that something was not happy with the new treble bleed wiring on my Epiphone Riviera P93, which has three pickups and three independent volume pots tied together at a three way switch. With treble bleed caps on all three volume pots, I was hearing strange interactions between the pots. For example, with the switch in the up position (neck and middle together), when I turned down the neck volume to zero, the middle pickup sounded way duller than it should have. Intuitively, I wouldn’t expect the treble bleed cap on the neck pot with the neck volume all the way down to affect the sound of the middle pickup!
After drawing out the circuit (pictured here), it became clear what was going on. Since the middle and neck outputs are tied together at the switch, there is a path for the middle signal back to the neck pot and the neck cap to ground. We added the treble bleed cap to allow high frequencies to bleed back through to the signal wire when turning the pot down, but in doing so, we also added a path to ground through that same capacitor, for the other pickup!
Note: this problem can be avoided on a typical two pickup 3-way switch guitar (Les Paul, ES-335, Sheraton, etc) because on those, with only two pickups, the 3-way switch has two non-blending positions which completely isolate a pickup. So instead of using the independent-volume (decoupled) wiring (pickup signal wired to center volume pot lug), you can use non-independent (coupled) volume-wiring (pickup signal wiring to side pot lug). In that configuration, there is no treble loss when turning down the volume, but if you turn down the volume all the way, it also kills the volume for the other pickup. (Hence the “non-independent” in the name). But this isn’t a problem because with only two pickups, if you want to turn off one of the pickups, you can just use the 3-way switch – you’ll never need to turn a volume pot all the way down.
I’m stumped on how to resolve this, without resorting to active electronics, so I’ll be skipping treble bleed in this guitar after all. After googling about treble bleed ad infinitum, I don’t see anyone else discussing this at all. Have I missed something obvious? If you have a solution, please get in touch!
zack
November 19, 2009 @ 2:15 pm
at the risk of sounding really dumb, could you put the cap between the pots and the jack and have it affect all three?
John
November 20, 2009 @ 2:06 pm
Interesting idea, but that’s not really how it works. The treble bleed cap is working with each pot individually to bleed some of the high end back into the signal, as some is lost as the pot turns down to ground.
If you were to try to place a cap in the circuit after the pots, it’s too late – the highs are already gone to ground, and there’s no getting them back 🙂
-John
gary
November 20, 2009 @ 12:46 pm
how about using a dual gang pot connected in a manner which increases the resistance between the cap and the jack as the resistance between the pickup/cap and ground decreases? i’m learning here, but i think i get this much: each pot needs an individual cap in parallel to allow the treble of each pickup to bleed to the jack as the resistance between each pickup and the jack is increased. a single cap can’t be shared between the three pickups and the jack because this parallel type connection allows the formation of an undesirable short whenever the pot resistance between any pickup and ground is turned towards zero.
John
November 20, 2009 @ 2:12 pm
Everything you said starting with “I think I get this much” is exactly how I understand it too. You stated it very well.
I’m trying to picture your suggestion with the dual gang pot, and I’m not totally getting it. Can you draw me a picture?
gary
November 20, 2009 @ 9:33 pm
I’ve attached a jpg I drew in MS Paint. The pot for the neck pickup is a dual gang, one set of leads is located above a second set (or “in front of” in the way I’ve drawn the pot). In the orientation shown, the bottom lead of each lead set is connected to ground so that when the neck volume is turned to reduce its output to the jack, the resistance between the capacitor (c) and the jack approaches 500 kohms. I don’t know if this solution is a good idea or even possible – routing the output of the capacitor thru a 2nd gang may defeat the effectivity of the treble leak if the optimal taper is not available. Also, I have not considered how a 2 gang pot for each pickup will impact the available level of “passive” power.
Keep up the great blog, I sense an invention is impending,
Gary
gary
November 21, 2009 @ 1:24 pm
There’s an err w/ the above dual gang design (feel free to delete the suggestion & drawing John). I do not think the taper of the capacitor’s pot gang can be adjusted so that it prevents sufficient resistance to ground while allowing sufficient treble to leak to the jack.
John
November 21, 2009 @ 2:30 pm
Hey Gary,
It is a thorny issue!
It’s cool that you’re trying to think outside the box and I appreciate your suggestion! I’m not going to delete it, as it may inspire other ideas…
Let me know if you have any more middle of the night revelations! 🙂
Thanks again,
-John
gerry
November 29, 2009 @ 11:45 am
There´s a scheme in Seymour Duncan’s website that shows a treble bleed circuit with a 100k resistor soldered to the capacitor, that might fix your issue.
John
November 29, 2009 @ 12:03 pm
This one? http://www.seymourduncan.com/support/wiring-diagrams/schematics.php?schematic=treble_bleed
The resistor in the treble bleed circuit (shown in parallel with the cap in this diagram, but it can also be in series) allows some of the low frequencies to bleed through as well as the highs. This is a remedy if you think the sound gets too thin and trebly as you turn down the volume. With the resistor in parallel, it also smooths out the taper of the pot a bit.
However, I don’t think it really helps in this situation, with the multiple pots tied together…
Thanks for the suggestion tho!
Peter
February 20, 2010 @ 2:49 pm
Question:
Could you use concentric pots for your 3 vol. knobs so each have their own volume and tone control? Or have a single concentric pot(volume and tone)for 1 pickup, and have the 4th knob as master tone for the other two?
John
February 22, 2010 @ 10:24 pm
While concentric pots are certainly cool, I don’t think they really help here. Individual tone controls won’t prevent treble loss when turning down the pots.
Peter
February 23, 2010 @ 2:09 pm
sorry for the lack of clarity, attach the treble bleed circuit to the individual tone pot for that pickup, so say, the neck pup would have a dedicated tone control with treble bleed, eliminated the sharing of treble among the other pots.
John
February 24, 2010 @ 2:27 pm
Hi Peter,
Sorry, I’m still not seeing it. A tone pot is passing highs through a cap to ground, and as such you can sort of think of it as treble bleed (but it’s bleeding treble to ground instead of to the output signal).
But that isn’t what we mean when we talk about a treble-bleed mod to preserve highs when lowering volume. This kind needs to happen not at the tone pot, but at the volume pot, between the two signal lugs.
Of course, I may be totally missing your point – if so, maybe you could draw a diagram?
Thanks for brainstorming!
John
Peter
February 24, 2010 @ 7:52 pm
actually, that would be my fault. i thought the treble bleed was connected to the tone, not volume controls. But, have you considered a push-pull pot for the volume of the neck pup, and then, when pulled, it would turn off the other pups, and only the neck (or which ever pup had the treble bleed) would be on? i don’t know if you’ve thought of this yet, but just a consideration.
ManMartin
June 12, 2010 @ 12:59 pm
Hi:
Thanks for all your experiments with pots and caps.
I have not tested this possible solution but you can try to insert a 10k resistor in every output of the volume pot in series, by this way create some kind of 3 channels audio mixer where every output will not affect so hard the other two.
It works the same way as a “Y” audio cable where instead a simple join, you will join the cable but with two resistors. You will loose a little bit of volume but you win independence of the different outputs.
I hope this will help.
Cheers from Spain
John
June 23, 2010 @ 1:48 pm
Thanks for the suggestion. I’ll have to give that a try next time I have all the electronics out!
-John
ManMartin
July 11, 2010 @ 11:28 am
I found again the link of the simple mixer, is here:
http://www.epanorama.net/circuits/linemixer.html
Cheers from Spain
Bill Stickers
July 30, 2010 @ 8:25 am
I KNOW!
What if you turned the Volume controls into “No Loaders”? What if you were to disable the connection from the switch to the Capacitor when the Volume is all the way down?
I think that’d leave it as an incomplete circuit when turned down instead of Grounded which might have problems (?)… I dunno. Maybe you could use one of those pots that has a switch on the bottom for active circuits, NOT a Push/Pull but those ones where it clicks “Off” when you turn it completely anti-clockwise… or clockwise… I forgot which way or even if it does only go one way…
WAIT. That’d just be turning it into a Blend pot…
Y’know what? It IS unsolvable without being a little crappy i.e like adding a dubious switch.
Maybe give the Middle PUP it’s own output to your amp… even plug it into another amp… Turn into a Stereo guitar, basically, isolating the Middle PUP by giving it it’s own circuit allowing you to dial it in at anytime because it’s got it’s own amp… but it’s not really a solution as it is a completely different and loosely relevant idea :D.
I’d leave it alone or isolate the Middle PUP to it’s own circuit.
I’m going suggest isolating the Middle PUP to another output for Stereo sound 😉 I wouldn’t do it though LOL as it would mean making a hole and soldering xD
John
August 12, 2010 @ 3:05 pm
Hey Bill,
I’ve essentially reached the same conclusion – leave it alone 🙂 If I decide to add bleed caps, I’d do them on only the neck and bridge, and then add a push/pull for the middle pickup volume, so that you can turn it off completely. Then, with middle pup turned off, it turns the guitar into a standard two pickup configuration like any les paul/es-335/etc. But with the middle pickup on, and in the center switch position, you’d still get some weirdnesses, but I don’t do that much.
-John
antonyyul
September 1, 2010 @ 3:52 pm
I really love your videos, I´m your fan. I own an Epi Zephir Blues Deluxe,
with 3 P90 and the same problem. But this guitar is based on a Gibson ES5
that sounds great in any combination ( there are several demos in YouTube).
It would be great to take a look at the ES5 electronics.
TalkToTheBody
September 13, 2010 @ 6:50 am
Great explanation, but never understood why manufacturers put separate
volume pots in for each pickup but I guess it boosted a few sales. Yeah,
you can set a volume up for each pickup but if the pickups are selected
properly and their strengths balanced properly for their location then one
master volume would be all you need. It seems designed for design sake.
Tyler Smith
October 7, 2010 @ 9:42 pm
Hey man, I’ve got a few detailed questions about Potentiomiters, I’d really
appreciate if you could PM me!! Thanks sick video
w2iecmkkghht
October 17, 2010 @ 10:48 pm
Well I have a sugestion.Why not using around 200K. resistor in series with
the treble cap.It can fill the bill ,although it can change the taper of
the pot.
Jared Ramsey
November 29, 2010 @ 5:01 pm
Push/pull pot!! Easiest way to totally bypass something like that is to cut
it out! Set it up as a pull-on treble bleed… Push to return normal
function. Plus, those hidden switches are friggin cool. Lol
John
December 10, 2010 @ 8:32 pm
@cjdMobile66 – I’m not sure what you’re referring to
Ideas for Treble Bleed Problems - Planet Z
February 4, 2011 @ 5:54 pm
[…] while back, I described some problems with trying to use treble bleed on a guitar with multiple volume pots. When turning down one […]
gullywoots
March 15, 2011 @ 11:16 pm
I usually set up my treble bleeds using a trimpot in series with the
capacitor, so it doesn’t get overly bright at lower volumes (see my latest
video). Maybe that could reduce the tone sucking. One question comes to
mind: what if all volume pots are equipped with treble bleeds? Would it
make any difference? Thanks for this great info!
Kelsey Mills
April 3, 2011 @ 12:44 pm
OK so I have a question what would a two volume 1 tone and a three way
toggle switch effect all of this
Kelsey Mills
April 3, 2011 @ 12:45 pm
sorry i have a two humbucker set up
John
April 6, 2011 @ 10:16 am
Diodes won’t work here. Since the audio signal is A/C, a diode would act as
a half-wave rectifier, clipping and distorting the signal.
John
April 11, 2011 @ 9:00 pm
@MikejR777 – in your 2 pickup setup, with 2 master volumes, the center
position of the 3-way toggle ties the two pickups together. In that
position, you will experience this bad interaction. However, it’s not that
big a deal since you can isolate each of your pickups in the other two
switch positions, and in those positions there’s no bad interactions. In
this 3 pickup riviera, there’s NO switch position which isolates the
pickups. See my planetz blog post on Feb 4 for more ideas on this.
John
June 23, 2011 @ 10:18 am
@Joshuaryanyoungblood – Since the audio signal is A/C, a diode would act as
a half-wave rectifier, allowing half the signal to pass through, causing
clipping and distortiion.
The1970sInfatuate
September 7, 2011 @ 8:56 pm
You can put a 100kΩ resistor in parallel with the .001µF capacitor.
Plipas
September 13, 2011 @ 8:14 am
Hello John, I have a guitar with the same set up with your guitar, and I tried to add another pot as a muster volume. so at this pot I added the tremble bleed cap, and it worked.So now I have also a muster volume with treble bleed cap, but I have to drill another hole to my guitar, that is going to be very close to the bridge pickup in order to have more direct control with the general volume, as I can access easier while I am playing.
John
September 13, 2011 @ 10:18 am
@Plipas – That was on my list of ideas to try, but like you, I was a bit nervous about drilling a another hole- it just doesn’t seem like it’ll fit well. What I’m planning on doing instead is making the middle-volume knob a push/pull, where the knob is a new master volume with treble bleed, and the push/pull just turns on/off the middle pickup. (I find that I generally use the middle pickup at either 0 or 10, so a switch should suffice). Good luck!
John
September 13, 2011 @ 10:21 am
@The1970sInfatuate – A resistor in parallel or series with the treble bleed cap is commonly used to reduce the amount of highs bleeding through, making it a bit less bright. The parallel resistor will also change the taper a bit. In any case, this won’t do anything to help solve the problem described in this video.
The1970sInfatuate
September 13, 2011 @ 12:06 pm
@johnplanetz It’s because of the particular circuity with your 3 pickups. On a guitar like a Les Paul for example, with 2 volumes and 2 tones, the pickups can be isolated with the selector switch, but you might encounter the same problem you’ve encountered when you play in the middle pickup position.
John
September 13, 2011 @ 12:16 pm
@The1970sInfatuate – yes, that’s right
The1970sInfatuate
September 13, 2011 @ 12:35 pm
@johnplanetz So would it be best to just have a treble bleed cap and resistor on ONLY the neck or bridge volume pot and not both pots?
John
September 16, 2011 @ 10:03 am
@The1970sInfatuate – with your two pickups and three-way switch, you’ll have a similar issue as described in this video, when your switch is in the middle position- with ANY treble bleed caps (one or both). it may work a little better with only one treble bleed cap, depending on the positions of the volume pots. experiment with alligator leads and find out what works best for you!
The1970sInfatuate
September 13, 2011 @ 1:36 pm
@johnplanetz I’m still somewhat confused about the entire signal path in my Les Paul because I did a complete Jimmy Page mod and the wiring job is very complex. I installed 4 push/pull pots and there is one combination that causes a dead spot or no signal.
John
September 16, 2011 @ 10:03 am
@The1970sInfatuate – double/triple check all your wiring against your circuit diagram, using a multimeter to check that everything that should be connected is, and that you have no unwanted shorts.
The1970sInfatuate
September 13, 2011 @ 6:10 pm
I thought of something: Do you think you would still have the same problem in a middle pickup position based on how the volume pots are wired? In some cases if you’re in the middle position and you completely turn down one of the volumes, the guitar’s signal will be muted. Other times it won’t be, and it’s the equivalent of just the one pickup, but you’re in the center switch position. It seems like you’re saying that problem occurs with only one pickup activated. What about both together?
John
September 16, 2011 @ 10:06 am
@The1970sInfatuate – the problem occurs in the blend switch position: whenever you turn down one of the pots with treble bleed, the signal from the other volume pot signal now has a path to ground through that bleed cap
The1970sInfatuate
September 17, 2011 @ 2:03 am
@johnplanetz I see. So it would be the middle pickup position with my neck volume pot turned down. I actually did a treble bleed mod on my Les Paul and I’m pretty happy with the overall sense of balance it gives to the volume range of the pot. I used a 100kΩ resistor in parallel with a .001µF ceramic cap. I put them across the #2 and #3 potentiometer lugs.
ChronoGXay
January 4, 2012 @ 3:22 am
I’m planning on doing the same kind of thing, only I’ll have not only volume pots for each pickup (three pickups), but also a master volume pot. (It’ll be like an equalizer, with channel volumes and a master volume.) I have rather little knowledge about electronics, but could you not independently ground each pot, or am I missing something rather important?
John
January 10, 2012 @ 9:12 am
@ChronoGXay – Each volume pot’s voltage divider will be connected to ground on one side. The circuit has a common ground- they’re all the same ground. There’s no way to have a truly independent ground for each of these in a passive circuit. If you wanted to go active, you could introduce some buffering (e.g. op-amp) between components to eliminate interactions.
ChronoGXay
January 21, 2012 @ 2:43 pm
@johnplanetz – The thing is, would I need to Treble Bleed all Volume pots? What I meant by having “independent grounds” is that instead of wiring all grounds in series w/ one another you could have each ground wire coming together in a ‘hub’ of sorts, and have the wire coming off of that ‘hub’ to the ground. (“I have rather little knowledge about electronics”, if you recall my original comment) If they can have many Volume pots/faders in equalizers and not have any problems… why not guitar?…
John
January 23, 2012 @ 11:46 am
@ChronoGXay – the ‘hub’ idea you describe is called ‘star grounding’ and is a good idea, to avoid ground loops. If you have a master volume, it makes sense to just put the treble bleed cap on that one.
ChronoGXay
January 25, 2012 @ 10:20 pm
@johnplanetz – Since there’s an actual name for the grounding method I described, I’m curious… do you know of an even idea than ‘star grounding’ (other than/in addition to pickguard and/or pickup cavity shielding) that I could use? Also, to make sure I’m getting this straight, do NOT put a treble bleed on all of the potentiometers, JUST the master volume. However, I’m still concerned that I’ll wind up losing some of the treble, since they’re first going through an “un-bled” potentiometer…
John
January 26, 2012 @ 8:20 am
@ChronoGXay – yes, the bleed-on-master-only is a compromise. If you use the individual volume pots to turn down, you will get treble loss. If you primarily use the master, it’ll turn out fine. You begin to see the beautiful simplicity of the strat-style selector switch and master volume 🙂
ChronoGXay
January 29, 2012 @ 7:03 am
@johnplanetz – What beauty? It’s just a compromise. While simplicity can indeed be beautiful, that setup is the way it is simply because they didn’t want to deal with those difficulties and–insodoing–make their product cost a whole lot more per unit- that’s what I see. (That makes a lot of sense, too- compromising the functionality of a product with simplicity for the sake of sales.) There’s a reason why the guitar I’m building is a ‘mad scientist’: it’s the complexity which gives it beauty.
UnirogA
January 23, 2012 @ 7:15 pm
so this also does happen on a typical les paul wiring with treble bleed caps? (2v+2t+1swich)
John
January 23, 2012 @ 8:24 pm
@UnirogA – with your switch in the center position (both pickups tied together), the same thing will happen. But unlike the 3-pickup circuit described, at least you have a way on your 2-pickup circuit to isolate one pickup in the up/down positions of the switch.
UnirogA
January 24, 2012 @ 2:43 am
@johnplanetz thanks a lot
Aaron Christiansen
January 26, 2012 @ 7:43 am
What about changing the 3-pos. toggle with a 5 pos. rotary switch? That way you could have the options of each pickup independently or the br&mid/neck&mid. Another thing that occured to me is if the middle pickup is wired out-of-phase for the humbucking effect when used with another pickup. I’m not sure if that might be a part of the problem.
John
January 26, 2012 @ 8:17 am
Hi Aaron,
Thanks for the suggestion. I discussed a number of different switch ideas in my followup article “Ideas for Treble Bleed Problems” at https://www.planetz.com/?p=1027
The middle pickup is indeed RWRP, but I don’t think that specifically causes the issue to be any worse…
-John
finemessugotmein
February 11, 2012 @ 2:04 am
Fantastic ! Thank you for your very informative video’s.
shprocketsnowwedawnc
March 30, 2012 @ 2:58 pm
Are you cold? Anyways thanks!
John
April 8, 2012 @ 8:48 pm
Yeah- cold house + no hair. 🙂
blacksnow150
April 2, 2012 @ 9:50 am
wd changeing the 3 way switch for a 5 way rotory switch and fitting a concentric dual vol/tone pot for each pup sort it ? and can you fit difrent capasitors to each pot if wired like this ? ( i plan to use this settup in a project…………….great videos verry helpful
John
April 8, 2012 @ 8:52 pm
Yes, there’s a bunch of things you can do, with alternate switching, etc. See my planetz blog post on Feb 4, 2011 for a bunch of ideas. The link is in the video notes.
My current plan is to change the middle pick up to be on a push/pull cut switch, and change around the volume wiring to be more like the typical Gibson 2-pickup volume controls.
jasonsoloist
April 11, 2012 @ 10:57 am
Hi Guys, I’ve installed the 0.001uf capacitor for my humbuckers equipped guitar, 500k pots, but its kinda weird that when I turn down volume to 1 it actually sounded BOOSTED like out of phase sound, at 2 silent and all the way works fine. Does that sounds normal pls?
joshua200000
April 16, 2012 @ 11:47 am
why not just put a mini switch between the cap and one of the lugs
John
April 25, 2012 @ 2:21 pm
switches would certainly work, but I was trying to avoid drilling any more holes. Push/pulls would also work too, but it seems to make it all a bit too fidgety.
jpjdo1212
April 19, 2012 @ 12:12 am
can i possibly use this trebble bleed on an ES-335 style guitar where there are 2 humbuckers and a three way swtich and each pickup has an independent volume and tone pot?
John
April 19, 2012 @ 8:33 am
If the volume controls are wired for independent volume (e.g. turning down one all the way doesn’t affect the other), then you will have the same problem bleed caps as described in this video. If not, (turning down volume all the way on one silences the other), then the bleed caps will work fine, but you may not even need treble bleed – your guitar should already maintain brightness when turning down. I’ll be doing a video-response on this topic sometime in the future…
jpjdo1212
April 19, 2012 @ 7:48 pm
what if i only use the trebble bleed on one volume pot instead of both? like the neck or the bridge?
John
April 25, 2012 @ 2:24 pm
If the volume pots are wired for independent volume (as they are on this riviera), then putting a bleed cap on only one pot will cause treble loss from the other pickup (when the switch is combining them). That’s exactly the scenario I demonstrate in the video.
ITCXTC
April 21, 2012 @ 7:33 pm
Could you use diodes to block the back feed to the low resistance leg?
John
April 25, 2012 @ 2:22 pm
The audio signal is A/C, so a diode would clip the signal.
gpchris95
May 5, 2012 @ 1:06 pm
I’m working on setting my guitar up for treble bleed. I thought about using one volume pot but the neck pickup is significantly louder. It was suggested that I use a trim pot to quiet it down but for that I would need an additional treble bleed for the trim pot, which won’t work right when both pickups are selected.
Since a pot is basically a variable resistor wouldn’t a regular resistor with a treble bleed capacitor work to balance pickup volume and retain high frequencies?
Or what about a t
John
May 8, 2012 @ 10:02 pm
A volume pot reduces volume by forming a voltage divider between the signal and ground. You can’t just place a resistor in series with the signal and expect a reduced volume. You could certainly create a fixed voltage divider with a couple resistors (or use a trim pot) to reduce the volume of your neck pickup. (I assume you’ve already tried adjusting your pickup height and pole pieces to balance the levels?)
gpchris95
May 10, 2012 @ 11:15 am
Ok alright that makes sense. My bridge pickup is perfect. My problem is with the neck pickup. It’s fine but I pretty much have to keep volume and tone at 10 all the time to keep it from getting muddy. I’d like more adjustability but I can’t figure a way. I like using the neck for lower volume rhythm but the second I turn it down it starts getting muddy.. Any ideas John?
John
May 13, 2012 @ 9:16 pm
Is it a two pickup guitar? If you wire it for non-independent volume controls (pickup signal to volume pot side lug, output on center lug), it should really maintain good brightness when turning down. This 3-pickup guitar was wired for independent volume control (pickup on center lug, output on side lug), and that results in huge treble loss when turning down.
I’ll do a video covering this topic soon.
gpchris95
May 13, 2012 @ 9:43 pm
Yes it’s two pickup. John I think you have it backwards. I always thought independent volume controls had the pickup wire going to the center lug not a side lug. I could be wrong about that haha
John
May 14, 2012 @ 8:06 am
Yes, that’s correct. I said it right, I think you just read it backwards 🙂 For NON-independent volume controls, you wire the pickup signal on the side lug, and the output on the center lug. For independent volume controls, you wire the pickup on the center lug, and the output on the side lug.
seansanfordnetwork
July 5, 2012 @ 2:56 pm
How about installing a master volume, kinda like a Gretch. Just add the treble bleed cap to the master volume and that will let you blend and then back down the output of your set blend. The bad part is you will still lose the treble from the first volume pot.
I’m super new to wiring. Does this work?
John
July 5, 2012 @ 3:09 pm
Yep, that all sounds right.
showerstm1
July 8, 2012 @ 7:09 am
@johnplanetz
Hey,
Thanks for all the info, this your videos about soldering have been very useful to me. I was wondering about if you had a 2 humbucker guitar with independent volumes and with a 3 way switch, and put a treble bleed on the bridge pup. In the neck position they aren’t connected so no effect, but in the middle position would the bridge volume also act as a tone control on the neck? Lowering the bridge would darken the sound by taking out both the bridge signal and the neck highs
John
July 8, 2012 @ 5:19 pm
Yes, that’s all correct. When wired for independent volumes, in the middle switch position, the two pickups are connected together (as shown in this video), and there’s a path to ground through the other pickup’s bleed cap. But your typical Gibson-style two pickup guitar is wired for non-independent volumes, and in that case, there’s no path to ground through the cap (and furthermore, you don’t really need treble in that configuration anyway)
Ted Park
August 30, 2012 @ 3:52 pm
Would connecting a diode to each pickup output before they are tied together work? It seems like it would block the middle signal from going to the neck treble bleed capacitor. I haven’t seen diodes used in guitars, but maybe it would work?
Feet4hands
September 17, 2012 @ 6:59 am
Great vid. I’m a bit confused, doesnt the selector switch ( 5 way ) isolate your pickups from each other ( if you’re using the pickups independently). I would have thought the only connection is when the selector switch is in the 2/3 pos’ or 3/4 pos’.
John Cooper
September 18, 2012 @ 4:16 pm
If you’re talking 5-way switch, I guess it’s a strat with one master volume? In that case, you won’t have any issue since there’s only a single volume control. If you had 3 volume controls and a 5-way switch, you could use non-independent volume wiring, and wouldn’t really need treble bleed caps. I need to make a followup video about independent vs non-independent volume wiring!
DislocatedCardiganV1
September 23, 2012 @ 5:30 pm
Good video, but generally speaking you only have caps attached to your tone pot. I did away with my tone pot altogether and replaced it with a 3 way switch on/on/on with 3 different caps valued at .047 .01 and .0047uf turned our great for my j bass. I’m currently (no pun intended) on a mission to rid the planet of tone pots. If you don’t use your tone pot I recommend a 3 position on/on/on switch with 1000, 470 and 200pf. Obviously you can pick your own values, experimenting is good. Easy
John Cooper
October 2, 2012 @ 3:41 pm
That’s a cool idea for fixed value high-roll-off selector.
This video was about treble bleed caps.
LacunaCoilas
October 14, 2012 @ 1:12 am
Have you made the follow up video of the differences between independent was non independent volume wiring?
John
October 14, 2012 @ 9:04 pm
No, it’s still on my list to do. I’ll try to get to it soon!
LacunaCoilas
October 14, 2012 @ 9:21 pm
Ok cool. 🙂 one more question, i finally installed new audio pots, i went with two push/pull pots, and is strange, i turn the volume pot down all the way, yet there is still audible sound when i play. It’s barely audible, but i can tell it’s not just the acoustic sound from the guitar because i unplugged it and played…. do you think i burned out the tone and volume pots? Admittingly, i soldered onto the sides of the pot because i didn’t know i wasn’t supposed to….
John
October 15, 2012 @ 2:53 pm
It’s possible but not likely that your burned up the pots.
You could disconnect the leads from the lugs, and measure with a multimeter. Make sure when you turn all the way down, you see 0 between one-side and center lugs, and full resistance between the other side and center. Then turn the pot all the way the other direction, and repeat the measurements, and you should see opposite results. If that all checks out ok, then you have some other wiring issue.
D.E. Palme
October 15, 2012 @ 8:06 pm
Couldn’t you just add a diode after the cap so that it will reduce the tone being sucked out?
John
October 15, 2012 @ 10:24 pm
No. The audio signal is A/C, so a diode would clip the signal.
D.E. Palme
October 16, 2012 @ 5:01 am
Ah, duh, not sure why I didn’t realize that.
Angel LaHash
January 27, 2013 @ 1:03 pm
Dont know what a electrolytic would do.
John
January 28, 2013 @ 10:15 am
Electrolytic caps are polarized and only available in higher capacitance values, so they’re not useful for treble bleed or tone…
Davesintexas
October 30, 2012 @ 9:50 am
Im sorry but I cant hear your POINT…REMEMBER THAT even with upscale monitor speakers like my M-Audios you loose generations of video and audio. So, the difference has to be MAJOR not slight…
MrMinimalSWN
November 23, 2012 @ 3:17 pm
Hey I’ve been thinking a bit, hope it helps you.
(3pin 1GND) 3way selecter should do the the trick.
Connect 3 caps like you normally would, take the output of the treble bleed cap from pickup 1 to pin 1 of 3way selecter. Now also do this with the other two pickups for pin 2 and 3.
Take the so called GND(wich it now is not) as output.
Connect all 3 Pickups grounds together.
Havent tryed it but I’m sure it will work.
Peace
John
November 29, 2012 @ 1:17 pm
interesting suggestion- thanks.
MrMinimalSWN
November 29, 2012 @ 2:39 pm
1 volume controle, 5way switch with different value of C for each switch setting.
1)3 pickups grounds are connected
2)Other wire of each pickup is connected seperately to pin1 , pin2 and pin3 (of a 5way switch with 2x 3pins and 2x main pin)
3)the 2 main pins are connected together with the middle lead of the volume pot
4)Right lead of pot is ground.
5)Left lead of pot is connected to 3caps
6)Other ends of caps go seperate to the prefered pins on switch that are left open.
Caps add in setting2,4
Angel LaHash
January 27, 2013 @ 1:02 pm
wouldnt a Strat Type of Switch be better.
Pickup–> Vol/Treb–> Switch–> Tone–> Output
John
January 28, 2013 @ 10:13 am
A 5-way selector (or superswitch) would let you isolate pickups, which is helpful, but doesn’t solve the problem in the combined pickup positions. Of course, would require routing a slot in the guitar top, which is not something I want to do…
listennow2this
November 24, 2012 @ 12:52 am
I just did this to my strat. It seems like it’s buzzing more than before. but I can’t remember how much it did it before. Could it be because of a bad solder job or is it normal for that to happen?
dwizted
January 22, 2013 @ 8:55 pm
I went with a 0.001 uf and 230 resistor on a les paul with no problems.
Angel LaHash
January 28, 2013 @ 1:38 pm
what value are you using again 1000pF (1nF) because you have them
John
January 28, 2013 @ 1:51 pm
Yes I was using 1000pf because I liked the sound of it. Depends on the guitar… My G&L uses a 200pF.
Angel LaHash
May 7, 2013 @ 4:41 pm
Nutty suggestion, Mercury Switch (whatever they have now) so when you tilt the guitar up you can have the Bleed Turned on.
Also Wondering if DUAL Volume Pots, using the 2nd Pots for each Volume Control in Parallel with each other, The one with the Bleed you have Wired up the same as you do with the Pickup but the one without the Bleed you take its pot that would normaly go to ground. 1/2Pot at worse case
Angel LaHash
May 8, 2013 @ 2:25 pm
just thinking, I could kill the Caps Ground when the Volume Pot it is on is at MAX. By Dual Volume Pot and Opening it up, Painting a Track from 0-490K or were ever you want the Cap to turn off and then even Scraping off/Painting over so no Connector. Making it a On and Off Switch Controlled by the Volume Pot.
John
May 14, 2013 @ 9:13 am
I’m not sure if I understand your suggestion, but it sounds like you’re thinking more of a no-load tone circuit. You can’t cut the track in a volume control, as it operates as a voltage divider.
john walkerdine
February 18, 2013 @ 6:17 pm
nice one yet! again john. i recon a 335 type,!? guitar is a warmer tone anyway leave it as is. how about a el chepo fuzzi. put 2 1n say 60 germaniun diodes in a 69 across each other across the jack out on a switch………. works great no me sg…. on here for the pot heads
Adam Gauthier
March 20, 2013 @ 8:06 am
Don’t combine pickups, isolate each one.
NaturalDutchSpirit
March 23, 2013 @ 7:08 pm
You could wire the volume pots the other way around. (arguably, the “better” way for your tone, and in combination with tone control)
Downside (or upside) is that every volume pot becomes a master volume. But, listen (and draw) what happens if you turn down one volume pot just a little bit.
Btw, imho treble bleed is more of a good sounding idea than a real asset. Tube amps really like my normal volume pots; because when turned down, the highs are lost and the overdrive really cleans up nicely.
John
April 6, 2013 @ 10:34 pm
Yes, I agree that non-independent volume wiring sounds better and avoids treble loss. My Les Paul is awesome. The reason Epiphone had to use independent wiring here was that the only way to turn off the middle pickup is to turn its volume knob down all the way. (The middle pickup is always on, in all three switch positions). My plan is to install a push/pull kill switch on the middle and change over to non-independent volume wiring.
Jeremy Zoubek
April 4, 2013 @ 7:49 am
Simple solution. Use some Pots with a push-pull switch. You can wire up the treble bleed to work when the pot is pushed in or out only. This way, you can isolate the treble bleed to be part of the circuit or out of the circuit, thus eliminating the bleeding of high frequencys.
John
April 6, 2013 @ 10:35 pm
Yes, lots of possibilities with switches. I had been looking for a solution to avoid switches/preamps/etc, but I don’t think there is one. My plan is to install a push/pull kill switch on the middle and change over to non-independent volume wiring to avoid the need for treble bleed caps.
Jack Castillo
May 8, 2013 @ 3:11 pm
You could use what Fender calls “No Load Pot”. At the lowest setting (highest resistance) it will disconnect.
You can convert your existing pot by opening it and putting a thin layer of epoxy or crazy glue at the appropriate end of the resistance strip. Let it dry completely before letting the sweeper connector touch it, or anything else. This is how I turned some of my regular pot to “No Load Pot”. I found out later that they are available on the market.
Cheers.
John
May 14, 2013 @ 9:01 am
I have a video in my channel about how to modify a pot to be no-load for use with a tone control (where only two lugs of the pot are used as a variable resistor). A volume pot is voltage divider, requiring all three lugs- you can’t use a no-load pot for a voltage divider.
Angel LaHash
May 14, 2013 @ 12:08 pm
Can Cut track, Two Circuits one inside the other, Big one is the Resistance, the Inner is the Common, for ease lets say the Arm (Brush) that is Touching the Common is the same Location as the Arm that is Touching the Resistance Circuit (i think normally they are opposite to each other) well were the Common one is Touching the track you cut ever side of it, making the Last Turn VOID.
one of your videos shows how the POT works
John
May 21, 2013 @ 10:15 am
I don’t follow your suggestion. You simply cannot cut the track on a pot and have it still work as a voltage divider (as in a volume control). It only makes sense to cut the track if you are using the pot as a variable resistor (as in a tone control).
Goatheadman
May 21, 2013 @ 1:17 pm
Thanks for your thought provoking blog and videos John. You have provided an outstanding resource to help me think about my tone. I have an Epiphone Les Paul custom (SG loaded with 3 humbuckers) and received it with treble bleed caps installed. It is in the same wiring-control configuration as your Epiphone.
I’ve left the treble bleed caps installed and think often about removing them. Can you provide some feedback on your preference with your Epi? Ie, are you happy with the treble bleed removed or do you wish to have them placed back in the circuit somehow?
John
May 21, 2013 @ 1:24 pm
I’ve been playing without the bleed caps. It works well to add a push/pull kill-switch on the middle pickup and rewire the volume pots for non-independent volume control. That way the pickups maintain their brightness well when turning down.
-John
Angel LaHash
May 22, 2013 @ 2:31 am
you can if you cut the inner common circle, but that would only work on a ‘A’ type.
Angel LaHash
May 22, 2013 @ 2:35 am
oops, but the suggestion was a dual pot, change the bottem one to and make it in to a switch. By cutting tracts so only at point it will touch the common. The other way is a pot with a switch, push pull could turn it off or there are ones you turn and turns off. My suggestion of dual pot, will let you pick were you want your bleed to cut out.
John
May 29, 2013 @ 5:11 pm
Yes, using a push/pull as a switch is certainly an option. Using a dual gang pot with the second gang as a variable resistor for the bleed cap is an interesting idea. Seems overkill, but might be useful.
Angel LaHash
May 30, 2013 @ 8:55 am
Not using the 2nd as a Variable Resistor, more as a Switch.. Painting the Tracks with Conductive Paint so near 0 Ohms. Cutting the Tracks so it dosnt connection at a let level, 0 would be a good point for you.
So Paint the Outer Track (resister) were the Brush hits the Track for 0 you cut about, making it so it will not connect between the Middle Pin and the Oppsite side to were you cut.
Google Bleed Treb AngelLaHash
That is mutli tone Bleed but it will also turn off your bleed in away
AngelLaHash
May 31, 2013 @ 5:57 am
https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-frc1/383436_4932382272204_1563330173_n.jpg
Cant Post Pictures on YouTube and Pictures say a More than TEXT
RickyRoro777
June 13, 2013 @ 5:17 pm
Could you use diodes to ensure that signals from each pickup and volume are isolated before combining them in parallel, thus eliminating the possibility for the wiring for one pickup to interfere with the signal from another?
John
June 14, 2013 @ 4:08 pm
No. The audio signal is A/C, so diodes will clip the signal.
DiZlat
September 1, 2013 @ 3:38 pm
Well I have a G-400 Custom with 3 picKups. I just cut off these caps on the volume pots and I have 3 Volume and 1 tone.Only one cap on the master tone pot ,and the Bridge and neck work with the 3way switch like in every 2 hambuckers guitar while the middle’s pot output is conected directly to the outpout of the 2way switch!So I can Mix the middle in any combination or play it alone if I turn the other volumes down!
John
September 4, 2013 @ 3:30 pm
Looking at your diagram, this wiring runs into the same issues as described in this video. The outputs are tied together, and the pickups must be wired to the pots center lugs for non-independent volume- so you get a varying load when turning the volume down (resulting in significant treble loss). And you can’t add treble bleed caps, for the same reasons as shown in the video.
DiZlat
September 1, 2013 @ 3:40 pm
img814.imageshack.us/img814/6286/3pickups.jpg
this is my wiring!
DiZlat
September 1, 2013 @ 3:46 pm
do not forget to put in front the letters !!!!!! h t t p
Jimy
September 1, 2013 @ 4:02 pm
http://i247.photobucket.com/albums/gg152/captainbraindamage/wiring-3pupCustomMod.gif
stavsantis
September 30, 2013 @ 12:32 am
So would my SG with 2 humbuckers and 2 volume knobs not be able to have a treble bleed installed?? Hmmm… I was going to coil split mod the SG anyway with push/push’s…. would this make it trebly enough in split mode so i wouldn’t necessarily need a treble bleed in it anyway, right ??
John
October 23, 2013 @ 11:51 am
You probably won’t need treble bleed. The volume pots in 2-pickup gibsons should be wired for non-independent volume, so there should be no treble loss when turning down.
Angel LaHash
October 16, 2013 @ 8:34 am
What i tried to express, (Im dyslexic so words aint my best thing) Conductive Paint on the Tracks of a Variable Resister and then cutting the tracks, so that when it gets to a point you want (ie for the NECK to be turned off) you cut the track so no connection.
nwimpney
October 31, 2013 @ 1:48 pm
Just off the top of my head, I’m thinking you could put a series resistor on each input to the 3 way switch.
It would raise the impedance quite a lot, and might introduce its own problems (like sensitivity to cable length, noise, etc), but it should let you reduce the interactions a bit.
Preston Smith
November 14, 2013 @ 12:32 am
I think with that guitar, the best you could do is a pedal. There is also
the possibility of a master volume. But more circuitry along the path would
probably be over complicated for a simple matter. Very interesting vid. I’m
going to put a treble bleed in my guitar (one volume strat), so was looking
for info.
A friend of mine was also considering it, and his guitar also has
independent volumes for each pickup. The only time they share the signal is
when in middle position. Could the cap be put there, or would it affect the
tone? What about parallel resistor and caps? I’ve seen those more often
than not…I know I’m asking alot. 😛
One more thing. As a side note: That guitar is a beautiful instrument and
the muddy undertones are perfect for that ‘aged’ sound. I wouldn’t change a
thing. 😛 Your vids have been very helpful, good job.
David Gilmour
November 16, 2013 @ 8:28 pm
you could follow the cap with a diode and then when the middle is up and
the neck is low and the signal wants to go to ground through the cap…. it
cant (diodes force electric to flow in one direction, like a type of “check
valve” for electricity)… due to the diode, signal can only go from the
cap side to the tone side which means you still get the 1000pf signal out
the out put… hope this helps, good day
fleuroman
December 13, 2013 @ 7:30 pm
The simplest cure is don’t turn down the volume 😉 . With the center pot at
any volume above where the neck pot is, you’re going to affect your treble
bleed or affect the center pickup, even without the cap, in the center
position the center pickup and neck pickup will affect each others ability
to reach maximum output, but far less than if they were in series…path of
least resistance thingy… put two 5 ohm resistors in series and you get 10
ohms of resistance, put them in parallel and you get 2 1/2 ohms, your
pickups work in parallel in the center position, they are constant values,
the pots, are both a resistor is series with their own pickup and in
parallel to ground…. complicated maths..
the way I see this you are power side filtering the bass out, is there some
way to earth side filter?
Paul Graham
January 6, 2014 @ 11:19 pm
Hi John.
I have figured out a way to make it work perfectly without using active
components or switches. I figured it out today but I have not had the
chance to try it.
Do you mid if I do a video explaining the circuit?
All the best.
ArmstrongProds
January 21, 2014 @ 12:02 am
Hey John, I mentioned this in the blog with another post, but the “treble
bleed” on the ground end of things might be an option that sounds favorable
once you play it, and you won’t get the low pass filter problem described.
But you wouldn’ t necessarily get what you’re after without a little more
doing. As you know, the treble bleed on the ground end has a similar effect
on retaining the highs but you’re still going to need a push pull or maybe
better yet an on/off/on mini-toggle wired for in/out of phase for the
middle pickup. I like this configuration with the mini-toggle switch on a
strat I have with P90s in the neck and bridge and a standard middle strat
pickup. I know you will lose the stock look with the mini-toggle but it
opens lots of tonal variations since each pickup can be played and adjusted
to differing levels of high pass which can be perceived as individual
volumes with treble bleed. Additionally, just a touch of the out of phase
can really help clean up the p90s while also adding what’s not being
cancelled in the top end.
Sandarpan Mukherjee
January 21, 2014 @ 10:14 am
I was wondering can’t you put a high value resistor between the two pickup
circuits so that the signal from one pickup won’t enter the cap on the
other pickup.
Pancho Véo
February 5, 2014 @ 7:06 am
Great
soulrebelno1
February 14, 2014 @ 5:56 am
How about the Free-Way Pickup Switch (
http://www.stewmac.com/shop/Electronics,_pickups/Components:_Switches_and_knobs/Free-Way_Pickup_Switch.html),
would that help? It a 6-way switch ($34.95 – ouch!) and would give you all
the standard 3-pickup options like a Strat, plus, you could use the extra
position for a parallel/series option. Great videos by the way. I can never
understand why people give a ‘dislike’ to videos like yours? You’ve
obviously spent a lot of time and gone out of your way to help people and
then they give you a thumbs down, baffling!
xxxbudi
June 22, 2014 @ 3:05 am
The solution to your problem is to replace all volume pots with pull switch
ones so the treble bleed can be switched in and out on the selected Volume
pot.
xxxbudi
June 30, 2014 @ 12:28 am
I have another solution which I think I will use, put the Treble bleed mod
into a volume peddle then it matters not how many controls your guitar has.
Lauro Morais
July 20, 2014 @ 5:22 pm
I have a Epi SG Custom with 3 pickups on it and i found myself having the
same problem as you… It seems that the most reasonable solution for this
problems is going for the standard wiring for 3 humbuckers LP and SG in
early gibsons, here are the schematics.
http://s2.postimg.org/4anstmdc9/GIBSON_3_CAPTADORES.jpg
http://s1.postimg.org/3yfgzt3tb/GIBSON_3_CAPTADORES_DESENHO.jpg . It’s not
expected to have some treble bleeds installed on volume pots, but in this
case is we wouldn’t have any problem by installing them, as there’s only
one position in which two pickups are selected, and even so the middle
pickup doesn’t have a volume pot to suck the signal’s trebles.I’m not an
expert on electronics so if there’s something wrong share so i can also
decide what to do with my guitar… I also wonder why there’s a treble
bleed cap on tone pots, do you know why?
Dave Gardner
August 11, 2014 @ 12:57 pm
Hi, great set of videos! I have successfully added a treble bleed to a
2-volume Ibanez ASR-70, which is wired similarly to your guitar. What I did
was added a 150 kOhm resistor in series with each capacitor, so that
prevents a tone circuit from being developed with one volume all the way
down, and also makes the treble bleed effect a little more subtle which I
like.
Javier Marcote
October 1, 2014 @ 5:42 am
Have you ever tried a 50s les paul wiring? Maybe it could work, despite it
has 2 volume pots and 2 tone pots. Nice work!
NekosanProductions
December 17, 2014 @ 7:09 pm
Use a diode to regulate the direction of electrons through the capacitor.
Frans van Helvoort
December 25, 2014 @ 12:13 am
I think there is a simple solution for this problem. Use for volume pots a
couple of stereo pots. When you turn down the volume, the treblebleed cap
is dialed in. When you turn up the volume, then the cap is dialed out. The
cap and pot is placed right after the pickup coil and before the volume
pot. I did not try it because I don’t have the same guitar, but in theory
this schematic should work. When you give me your Email adress I can sent
you the schematic, because I can not post that here.
Kind regards Frans van Helvoort
Sean Morris
December 27, 2014 @ 12:29 am
Good point. I just reviewed your diagram again. It occurred to me that you
might solve the issue with a resistor. I have a treble bleed in my (single
volume) Stratocaster. I chose to put a 100k resister in parallel with my
0.002mf capacitor (Duncan), but you can also try a Kinman Treble bleed,
which puts the 0.0012mf capacitor in series with a 130k resistor. In fact,
I believe any resistor with a value that is less than half the pot should
work fine. i’ve heard that the Kinman bleed is more effective, but Duncan
just seemed easier for me.
Leo Rock
January 9, 2015 @ 2:16 am
Hello! What if completely change wiring diagram? Leave only one master
volume with tone bleed, install balanced pot (before volume) extend second
volume. So you can control balance between pickups. When you turn balanced
pot to one side, volume of one pickup will go up for other go down. Same
way when you turn balanced pot to other side. Many bass guitars has this
balanced pot. And standard 3-way switch will work like always. I think it’s
easy and cheap solution and you will not lose les paul functions
Leo Rock
January 9, 2015 @ 2:29 am
Hello! What if completely change wiring diagram? Leave only one master
volume with tone bleed, install balanced pots (before volume) extend second
and third volume. So you can control balance between pickups. When you turn
balanced pot to one side, volume of one pickup will go up for other go
down. Same way when you turn balanced pot to other side. Many bass guitars
has this balanced pots. And standard 3-way switch will work like always.
With this solution you will not lose les paul functions and even 3 pickup
guitar but may be it will be difficult to use in beginning
Manny Cowdrey-Cuberos
January 13, 2015 @ 2:49 pm
Would this be an issue if you never had to turn the volume off entirely on
a pickup while they’re connected? i.e. in a 2 pickup 2 volume Les Paul type
setup, where you either want each pickup on its own, for which you
disconnect them with the 3 way switch, or both together at varying volume
levels between them, but never off for either. In short, if there is even
the smallest amount of resistance in both pots, does the issue become
completely negated?
Saitenreiter
January 29, 2015 @ 11:33 am
Hello! I´ve recently watched a Youtube vid where a guy did a general setup of a Reverend Volcano he´s going to sell. When unsrewing the output jack he was astonished to find a cap soldered between the lead and ground connections, obviously factory made. An uncommon but possible way to avoid treble bleed? Or probably done with another intention? I´m aware, that the Volcano has just 1 master vol, 1 master tone and the Reverend-exclusive “bass contour” knob(a kind of bass roll off control – in fact it seems to affect more than just the low frequencies of the pu signal). I wonder if this feature wouldn´t be a great idea for my Les Paul/Flying V guitars – two volumes, a master tone and instead of the never touched bridge tone such a bass contour control. Does anyone has information about the pot and cap values of that control or perhaps a wiring diagram???
Thanks a lot, John, for your great and helpful videos!
And SORRY for my bad english – I´m from Germany…;-)
John
January 30, 2015 @ 9:25 am
That cap between the jack signal and ground is simply a quick method to roll off treble. If your guitar is too bright, it’s a quick fix.
I don’t have a wiring diagram for Reverend’s bass contour, but you might be interested in the G&L treble/bass control I described here:
https://www.planetz.com/treble-and-bass/
-John
AngelLaHash
February 10, 2015 @ 2:41 pm
G&L Design has just a 200pF Bleed
I can make a Vairable Bleed that 10-6 is 1nF and then drops to 600pF about 4-3 and then 3-1 200pF
As for the G&L Bass bit.. im not sure to use a 250/500 Pot with a 750/500 Resister in series making the 1M..its dam hard to get a C1M and for a reasonable price.
Myself i went inside the pot ..cut the track right near the Leg, making it cut off from the Resister part. Means when the Input Arm is over that side of the pot it will bypass the Resister, but as it moves towards the other leg it will go from 1M down to 500/750KOhms as personaly after that it was hard to notice any reaction with the C1M pot oh and dont forget the 2n2F cap in Parr with the resisters.
Michał Steinborn
March 21, 2015 @ 11:42 am
I saw somewhere that guyz where isolating volume pots. They ware sending
singnal not to ground but each volume had a transformer to send singnal
to.
JYZProductions
May 27, 2015 @ 4:20 pm
I’m curious if this issue with the treble bleed happens with the kinman
variant of the treble bleed.
Louis Aguado
June 14, 2015 @ 12:31 am
I think this is why independent volume wiring doesn’t work well on 50’s
wiring too. if you do the inputs to the outside lug instead of the middle
lug it may work.
Pj
June 6, 2018 @ 2:41 pm
Hi John. Not sure if you’re still following this thread but I thought I’d make a suggestion. I’ve followed some of your videos in the past and must commend you on your efforts to enlighten and broaden the world of guitar wiring in a very practical way. I understand that you’ve now sold the p93, so maybe somewhat a moot point but I think it could easily find use in a two pickup guitar with some wiring mods or different sounding pickups and so I thought I’d post anyway for future consideration.
Based on my frustration with similar problems and something I’ve read recently on the guitarnutz wiring forum by top man JohnH I’ve got a few thoughts to add to the treble bleed, pickup balancing malaise.
I’ve always been a fan of balanced pickup sets in guitars but recently have found myself with a challenging semi hollow guitar with two quite different pickups on that I’d like to be able to blend more individually than usual.
I too have tried to make the independent wiring work, previously I did this experimenting with pickups I had lying around with a very different profile that I wanted to be able to balance. I’ve also tried it with out of phase wiring as there’s some wonderful blends to be had in that instance. The treble roll off of the decreasing load really dents the benefits doesn’t it. I found using linear pots made balancing much easier, allowing both pickups to be full on, or have a little resistance dialled in between which makes for a more mid rich two pickup sound without the coils loading each other. This said, turning down with 500k pots just shunts too much series resistance in front of the cable capacitance and sucks away those nice chiming highs again. Previously I’ve built transistor fet and op amp buffers into guitars to isolate the cable and save some of that tone loss but the lack of independence is still an issue. JohnH came up with a wiring scheme that combined an output buffer and some other cool switching but the most interesting element he added was a series resistor after each volume pot (wired as traditional with the output on the wiper). This means that when one volume is down there is no direct short across the other pot, as such affording much more indendence. I’ve done this to reduce strat quack in the past but the trade off is the increased output resistance interfering with the cable, but it never occurred to me to also throw the buffer into the picture, negating the problem of increased impedance prior to the cable. This is especially effective when both volumes are backed off as the shunting of the load across the other pickup is reduced even more so, improving the range in the goldilox portion.
Hope you find some use in this. I’ll try post the link to John’s post later.
Cheers from North Wales, UK.
John Cooper
June 6, 2018 @ 4:19 pm
Interesting suggestion, thanks! Back with the P93 I was pretty adamant in avoiding active buffering. But the idea of the buffer in addition to series resistors is a clever idea indeed 🙂 -John
Pj
June 6, 2018 @ 11:57 pm
Heres the link for reference http://guitarnuts2.proboards.com/thread/3773?page=1
Yes, I’m always keen to avoid adding unnecessary complication where necessary too. As Bill Lawrence used to say, batteries belong in flashlights. But, there does seem to be the odd occasion where a buffer saves the day. Personally I think the Don Tillman cable buffer is the best solution, keeping the electronics out of the guitar.
Looking at your other posts I find myself smiling, that sg is a real nice one and I’m a sucker for them. I’m limited a little on guitar ergonomics recently as I’ve had a couple of cardiac arrests in the last two years and been quite poorly, subsequently having to sell alot of gear to stay afloat while not working. Your ethos of shifting it if its not used makes alot of sense. I’d like to have kept my second sg, a Gibson classic, but ultimately life didn’t allow but I’ve kept my favourite Tokai.
I’m interested to find out more about your live sound after seeing the headphone amp article. Are you all running in ears? Sorry for waffling I wasn’t sure if I should hassle you by posting a large post or hassle you by commenting on more than one 🙂 . Hope I’ve not made a faux pas.
Take care
John Cooper
June 7, 2018 @ 11:37 am
Hey PJ-
Thanks for that link! Yeah we’re all still using the same in-ear system: ART HeadAmpPro6, and Shure SE215’s. Overall, the system has been consistently excellent. The only issues have been one issue (flickering leds and hum) with the ART requiring warranty repair, and the silicon tips of the SE215’s getting a bit old/loose over time but replacements are available. The use of extension wires instead of wireless hasn’t really been an problem for us, and it makes for a much less expensive system. Hold on to that Tokai! 🙂
-John