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Post subject: Fender TBX Tone Control
Posted: Tue Feb 05, 2008 11:21 am
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Hi, I got this TBX Tone Control inside my Strat now, but Im wondering about couple of things.

when the control is at 5, how is the signal effected? is the signal at 5 quieter than when the TBX tone control is not there? I think i'm losing output from my pickups after installing these.

and when i turn it up to 10, it sounds louder (and of course treblier) than when it's at 5. is it just the treble is coming to my ears a lot cleaner than the lower frequencies?

Thanks for any comments/answers. :D


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Posted: Tue Feb 05, 2008 11:53 am
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What is a Fender TBX tone control and how does it work?

Some Fender guitars come equipped with a special pot called a TBX Tone Control T (treble) B (bass) X (Cut) that cuts either treble or bass instead of a tone pot that cuts treble frequencies only. This is done with a ganged 500K-1M ohm control pot that is wired to work as a low-pass filter in one direction and a high-pass filter in the opposite direction.

A center detent in the middle position is provided for the off or "flat" position. Although Fender altered their Start tone configuration to have the TBX control the middle and bridge pickups, it can be also be wired as a master treble/bass control. The TBX can also be used in place of any standard tone control on any guitar.

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Posted: Tue Feb 05, 2008 12:16 pm
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so does that mean when the dual ganged pots are at 5 (flat), then none of the signal goes to ground? which means the contorl is completely cut out of the circuit?


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Posted: Tue Feb 05, 2008 2:23 pm
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ECistheBest wrote:
so does that mean when the dual ganged pots are at 5 (flat), then none of the signal goes to ground? which means the contorl is completely cut out of the circuit?


Yes, I have two AmStd Strats and one has TBX, the other has Delta Tone.

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Posted: Thu Mar 13, 2008 8:55 pm
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I've seen that definition of TBX before and it is wrong. Some company put that up on the internet and everyone quotes it.


It is a dual pot, yes. But it is a 250k/1 meg dual pot that simply acts like a regular 250k tone pot from 1 to 5 (the detent), then from 6 through 10 the 1 meg tone pot gradually takes over so that at 10 the 250k pot is out of the circuit. You gradually add more treble and slightly more signal overall. It only adds as you go up, it doesn't cut bass. In practice though, the detent tends to sit at slightly less than a 250k pot full-up, and at 10 it is typically slightly less than 1 meg as well. So to get a more normal setting out of a TBX, you may need to set it just past the detent, and then if you need or want more treble you can move it towards 10.

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