Ampeg Blues

[Andy Le Blanc]

I've got a reveberocket on the bench. It's a R-12-Rt with both the 6U10
and BK11. The BK11 is the oscillator and is hooked up to provide vibrato
and not the typical tremolo. Its being problematic. Unstable. The oscillator
third is functioning but the other two thirds are dressed as two opposed triode ( diode?).
Ive seen univox schematics with this approach to trem/vib
but haven't trouble shot this type. Anybody with experiences with this hook up?