TBX Tone Pot Wiring

[Chris Pile]

Re: TBX Tone Pot Wiring

Tone suck..... is that a technical term?
Anyone have the accepted dictionary definition of TONE SUCK?

Because if you can't define it in words that EVERYONE already knows, then I say you're full of ****.

[de_dUKe]

Re: TBX Tone Pot Wiring

So i just ripped the 220K resistor out of the circuit, leaving only the one jumper and the capacitor...

..And it sounds great..)

No need for that thing to be in there at all..
I played around for hours, turning the dial frequently and only got one small 'pop' and one tiny 'crackle' the whole time, so well worth it to have the full tone coming through the pot than have a restricted sound but be 'pop' free..
I don't gig with this guitar so its no-brainer to keep the full tone..

Sounds like my old guitar again..

I also like the 'hi-fi- sound of the pot on the 1M scale too.. Adds some subtle clarity which can only be a good thing, unless you're after a completely vintage feel then maybe not for you..

Maybe the next time I have the guitar open I will try a smaller capacitor and remove even more of the bass..

Cheers guys..

[Chistopher]

Re: TBX Tone Pot Wiring

The problem with the TBX isn't the hardware itself, it's the way the factory has you wire it. The resistor is in the circuit the whole time, which may not be that noticeable in an active system, but in a passive system it is a major tone sucker. With the mod I posted above, it is basically the same as a tone control, it just switches between a high to a low pass filter.

[jeremy]

Re: TBX Tone Pot Wiring

ive pulled the tbx from every guitar ive had it in and replaced it with a conventional style tone control and im much happier for it

[Chistopher]

Re: TBX Tone Pot Wiring

I found another mod online a while back, and in theory it does what a TBX should. I say "in theory" because I have never tried it and it might still not change smoothly between the two pots.



As far as I can tell, this mod makes it so that the TBX uses a cap as a high pass fliter from 10 to 5, goes completely no load at 5, and acts as a low pass filter from 5 to 0. It also has the bonus of not having a resistor, like you wanted. But I'm not sure that's entirely desireable, giving that the resistor eases the transition between the 250k, no load, and then 1meg.

Edit: I might also consider changing some values on the mod, the .047 cap cuts treble and the .0022 cuts bass.

[de_dUKe]

Re: TBX Tone Pot Wiring

Hey thanks for the suggestion ICTGoober..

Here is the Fender diagram..



From reading about the TBX tone pot, I gathered it was a designed around the active Mid Boost circuit and the 82K resistor is 'tone-sucking' in a passive system, hence me not following the Fender diagram.
Though the 220K 'passive mod' definately sucks tone from the guitar too.

Is the 82K resistor necessary and how does it effect the no-load tone.?

Also would the TBX be fully-functional with just the one jumper between lugs 2 and 3 of each pot, with the capacitor taking it to ground...?

[Chris Pile]

Re: TBX Tone Pot Wiring

I like 'em wired up Fender style according to the diagram that comes with the package.

[de_dUKe]

Hey Good Folks,

Been experimenting lately with all kinds of tone pots, different brands and values, push pulls etc..

Fitted a Fender TBX tone pot yesterday, as on paper it sounded like a great solution. A 250K pot, no load and 1M pot all in one with various ways to wire it.
I didn't use the stock wiring plan as it was designed for use in an active system, but instead used the 'TBX passive mod' on PremierGuitar by Doc, using a 220K resistor to bridge the bump between pots, but i don't like that either.



The 220K resistor comes into play at no load, which is the best setting for me, so I'm looking for the most efficient way to wire this thing up with the fewest wires and no resistors.
Obviously I could change the resistor for a plain wire jumper and that would work, but is there a better way.?
Through all my experimentation, i figure a 500K no load pot would be the best for me but this thing was expensive and may give me something more if wired correctly. Just gotta make it go fully no load at the indent position.

https://www.premierguitar.com/articl...rol_Mod_Part_2

Cheers guys