PTB on push pull pot

[aramis]

I am planning on wiring up a toronado, with dual PTB controls, and since I have individual tone controls for each pickup I figured I'd make two push pulls after a couple weeks I believe I've figured it out (picture above). does this look about right to you guys, any suggestions on cap and resistor values, I plan on keeping the standard treble circuit pretty orthodox in terms of cap values.

thanks!

[frets]

Hi Aramis,
You’ll be getting a big hello from the Admins but given I’m really into PTB systems, I just had to jump in at first and give you an idea about your push pull.  Doing a passive treble bass is about pots and caps; but, more importantly, how they are wired to interact together to produce the intended bass and treble cuts. It’s all how you wire those pots together that makes the passive treble bass magic. I’ve learned that the hard way 😺. Just wanted you to know that if you don’t already. I was looking at your pot and just wanted to share a design that might work for you better. Of course, it’s just a suggestion. The push pull I’ve drawn for you I think gets at just the Treble Bled Volume/Cut design. The example would be the Treble Cut. It might work better for you. BUT, the other guys will weigh in. I’d love to see a full diagram of what youre intending to do. Again, I have an interest in this particular subject.

[aramis]

The overarching plan is to try and make everything look stock externally (Toronado, HH configuration, think offset SG) , I'm planning on mounting a freeway switch and then having dual volume knobs with toggle single coil (outer coils, I may need to daisy chain ahead of the switch, haven't gotten that far yet...), and a constantly active TB. Next I'm going to wire the tone controls with a standard treble dpdt, that when toggled will engage the bass cut allowing our tone control to act as a bass cut.

The philosophy behind the choices:

-the lower registers disproportionately drives distortion effects when compared to higher registers, rolling off some bass will lower drive, I'm currently running my Ge-7 in front of my distortion to achieve this effect.
-If I want to affect the treble, the volume control should have as little to do with that as possible
-If I want to cut bass, I probably don't want to cut highs, the opposite is also true
- If I want to control sound the best way is to use playing technique, modifications ideally should only alter how the guitar responds to technique and shouldn't be expected to meaningfully change timbre on their own.
- I think the guitar looks quite pretty and I like subtlety when it comes to modifications, the guitar should play and function like stock when modifications are de-activated

still considering:
-blower switch for bridge pickup
-using a jaguar style switching system for coils splitting + blower and having the treble bleed tied the Dpdt pot

(thanks for the reply frets! As I understand your circuit it's a treble bleed up and a treble cut in the down position? Hello from Canada!)

[frets]

Hi Aramis,
The one I drew is a Treble Bled Volume, you pull up to activate the Tone. Idea is you set your volume, pull up and roll in your tone or “treble cut.”

[newey]

aramis-

Hello and Welcome to G-Nutz2!

Everything I know about the PTB system I learned from JohnH, here:

guitarnuts2.proboards.com/thread/7172/bass-cut-ptb-system

The schematic he shows has a 1M pot with just a 2.2nf cap, no resistor. But of course that's with separate pots for bass and treble cuts, here you have to make do with just one. But JohnH's discussion is worthwhile reading before you dive into this.

Your circuit seems fine to me, although I think you may have reversed which position is "up" versus "down"- but it's hard to tell because your diagram of the P/P isn't oriented as in real life. But let's get another set of eyes on it, and some advice as to component values. I haven't personally played around with the bass cut thing, so I'm not the one to ask.

However, one thing- I'm not moving this thread because it does pertain to tone control discussions, and the PTB scheme has always attracted a bit of attention. But we're veering off into a discussion of the mods you plan to do to a particular guitar, and asking for advice on the project. I ask that you (please) repost that as a separate discussion in the general guitar wiring area, for two reasons: One, the discussion of your wiring will be non-germane to this board (and to this thread), and second, because no one is going to be looking for your wiring ideas/questions in a discussion of tone controls. You'll get more "eyeballs" in the general wiring sub-board, knowhutahmeen?

[aramis]

Thanks, both of you, I'll try and stay on topic , I had a look on the other thread it seems like I might need to revise my schematic, and yeah it does look upside down.... 

[aramis]

Update, will be testing idea soon, but I realized that cannibalizing some 1K wafers and making a 500/1K concentric pot is the way to go.... 

[ninethirty]

FYI, your idea is really close to the "Dry Switch" that Yamaha puts on some of their Revstars:  www.premierguitar.com/mod-garage-inside-yamahas-dry-switch

It's basically a fixed bass cut on a push-pull, like yours. They use a 330k resistor and a 3300 pF capacitor.

[Deleted]

sorry its just itching at me that its ever a Cap or a Cap+Resister to ground

Most bass tone controls i've seen have been inline with the circuit
Like G&L C1M+2n2F and as ninethirty Pointed out Dry Switch that is 330K+3n3F all inline

[bubbaleeevilgenious]

I'm following the first drawing. I've got a B250K push pull tone. The caps I'm using are. The treble cut Cap is a 10v 220uF, and the bass cut Cap is a 10v 1000uF. With a 1meg resistor. I'm doing this to my Rogue Generic Pbass.