Tremelo speed

[Fumbles]

Hi all…..my second post regarding the Fender Custom Shop ‘64 Re-Issue Vibroverb with the Cesar Diaz modification, that I own.

Even on the slowest setting/position, the tremelo speed is way too fast for my taste. I honestly would like it to barely wobble on the slowest position and to have a moderately fast wobble on the highest setting.

I have read somewhere that there is a mod to slow these down. My questions to the board are:

A) How easy is the mod to do?

I am not a repair tech at all but I’ve done a lot of soldering in my life, so I’m not afraid of that……I’m more sketchy about the voltages in these amps and getting a cap discharge shock.

B) If it is a matter of changing or adding a component like a resistor…….any idea what value resistor I should go for?

Thanks.

[TUBEDUDE]

You can have a slow wobble or a fast chorus like trem, but not both, as the phase shift oscillator has a narrow range. See info here:
https://www.aikenamps.com/index.php/des ... o-circuits

[maxkracht]

You just need to add another cap/caps across c20, 21, or 22(assuming this is the correct schematic). Bigger cap, slower tremolo. Add .01uf at a time until you get the speed you like. At some point it will get so slow it has trouble kicking on.

https://www.thetubestore.com/lib/thetub ... ematic.pdf

[ViperDoc]

Look for sluckey’s LED cathode mod on the AB763. (?) I put it on a switch between stock and it slows it down even more. I also swapped one small trem cap for another large one. “Date Night” mod.