Tremolo speed - varying vernier

Dacious · March 18th, 2003, 08:49 PM

:? Hi guys. I am working on a friends little Rose-Morris Goldentone, a push-pull amp using two 6GW8s. Got rid of all the hisses, crackles and noises, owner is very happy. But I changed the .01 and .02 caps in the vibrato circuit which killed the noises, but the vibrato now runs much faster. Is there a way to slow it down?

I don't have the schematic for it, but checking on the FFAG, it appears to be wired similar to small fenders, with a triode (one off the 6GW8s) driving a network of .01 and .02 caps and resistors coming off the plate and grid, using the intensity control to mix the vibrato signal with the dry.

I remember someone posting about changing some values on an amp with a similar problem to back the range of speed off a bit.

Any clues?

Mitch Roberts · March 18th, 2003, 09:22 PM

Don't quote me on this, but I THINK you need to change the .01's in
the trem circuit to .02's. I'd try one at a time an see what happens.
I did this in my Super Reverb and got really cool slow tremelo.

Mitch

Dacious · March 23rd, 2003, 02:27 AM

Tried swapping one by one. Changing all three gave the best combination of range and speed - he's really happy with it now.

Mitch Roberts · March 23rd, 2003, 09:42 PM

Glad it woked out. I think a really slow tremelo sounds
very cool in some applications.

Mitch

March 18th, 2003, 08:49 PM	#1 (permalink)
Dacious Friend of Leo's Join Date: Mar 2003 Location: Godzone Posts: 2,601 35 Photos	Tremolo speed - varying vernier :? Hi guys. I am working on a friends little Rose-Morris Goldentone, a push-pull amp using two 6GW8s. Got rid of all the hisses, crackles and noises, owner is very happy. But I changed the .01 and .02 caps in the vibrato circuit which killed the noises, but the vibrato now runs much faster. Is there a way to slow it down? I don't have the schematic for it, but checking on the FFAG, it appears to be wired similar to small fenders, with a triode (one off the 6GW8s) driving a network of .01 and .02 caps and resistors coming off the plate and grid, using the intensity control to mix the vibrato signal with the dry. I remember someone posting about changing some values on an amp with a similar problem to back the range of speed off a bit. Any clues?

March 18th, 2003, 09:22 PM	#2 (permalink)
Mitch Roberts Tele-Meister Join Date: Mar 2003 Location: NYC Posts: 419	Caps Don't quote me on this, but I THINK you need to change the .01's in the trem circuit to .02's. I'd try one at a time an see what happens. I did this in my Super Reverb and got really cool slow tremelo. Mitch __________________ I think, therefore I jam.

March 23rd, 2003, 02:27 AM	#3 (permalink)
Dacious Friend of Leo's Join Date: Mar 2003 Location: Godzone Posts: 2,601 35 Photos	Thanks Mitch Tried swapping one by one. Changing all three gave the best combination of range and speed - he's really happy with it now.

March 23rd, 2003, 09:42 PM	#4 (permalink)
Mitch Roberts Tele-Meister Join Date: Mar 2003 Location: NYC Posts: 419	Trem Glad it woked out. I think a really slow tremelo sounds very cool in some applications. Mitch __________________ I think, therefore I jam.