Dampen Tremolo on a Beltone Teisco AP-12?

[Humber]

This amp:

Teisco Amps - History, Photos, Documentation

Has variable tremolo speed but not depth, and it's too heavy. I've tried changing the values of every component in the area; the changes either did nothing, killed the vibrato all together, or only changed the speed. I don't need an extra intensity pot, but I'd like to dampen it enough to be musical.

Any ideas? The vibrato circuit uses a 6AV6. The amp sounds great, by the way. I totally recapped it and replaced the blown speaker with a 60's 4 ohm Jensen C8R. It has a bit earlier breakup than my 64 Vibro Champ.

I recently used it backing up a singer in a 500 seat convention center "ballroom" (more church basement catechism than Cinderella and Prince Charming) and it sounded huge and majestic. Hah!

[Enzo]

Can you post or link a schematic?

trem circuits always have two aspects. There is always an oscillator. LFO - low frequency oscillator. There there is some sort of interface to control the signal path. The LFO drives the interface. SOme couple the LFO signal into the amp with a cap, others use a photocell. Your LFO would seem to be working, so what you want to work on is the interface. And for help there, I would want to see the schematic.

[RWood]

The Checkmate 18 also uses a 6AV6 for the tremelo; maybe it is the same circuit as yours.

http://www.schematicheaven.com/barga...eckmate_18.pdf


RWood