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Re: Brown Tone stack vs. Black Face stack

6/7/2005 12:56 PM
Ray Ivers	Re: Brown Tone stack vs. Black Face stack Gary, Looking at the print, the 6G7 tone stack appears to be a 'scooper' as well. How about changing the bass control to a mid boost, one of my favorite mods for an amp with a tone stack early in the gain structure; the treble control's re-voicing can also help compensate for an overly trebly guitar. Ballpark values would be: 50pF treble cap 47K slope resistor 2.2n (.002uF) bass-control cap 4.7n mid-control cap Stock blackface pot values (250K/250K/10K) are fine, and you can replace the mid pot with a 1K resistor if you find you no longer really need it. NOTE: These are radical changes, and the fabled Fender clean sound will be pretty much gone; push-pull pots switching in the old circuit values can bring it back if desired. I've also developed a modified Fender-type stack that gets a high-Q narrowband mid cut for almost an acoustic-guitar type of clean, with +/- 1dB flat response if needed; it adds one each inductor/cap/resistor to the Fender circuit. Ray

6/7/2005 12:56 PM

Ray Ivers

Re: Brown Tone stack vs. Black Face stack

Gary,

Looking at the print, the 6G7 tone stack appears to be a 'scooper' as well.

How about changing the bass control to a mid boost, one of my favorite mods for an amp with a tone stack early in the gain structure; the treble control's re-voicing can also help compensate for an overly trebly guitar. Ballpark values would be:

50pF treble cap
47K slope resistor
2.2n (.002uF) bass-control cap
4.7n mid-control cap

Stock blackface pot values (250K/250K/10K) are fine, and you can replace the mid pot with a 1K resistor if you find you no longer really need it. NOTE: These are radical changes, and the fabled Fender clean sound will be pretty much gone; push-pull pots switching in the old circuit values can bring it back if desired.

I've also developed a modified Fender-type stack that gets a high-Q narrowband mid cut for almost an acoustic-guitar type of clean, with +/- 1dB flat response if needed; it adds one each inductor/cap/resistor to the Fender circuit.

Ray