COLORSOUND: Treble Booster, Steve Williams (partial trace)

Colorsound treble booster SW v1a 63b78e94114f

So there are a few bits missing, but if you are familiar with treble boosters, I’m sure you’ll work it out.  Being a small and simple circuit, it’s a good candidate for breadboarding. The filter pot is your standard input blend, probably similar to the values that Steve Williams uses in his Pigdog Competition Special … Read more

BELL & HOWELL: Model 385 Amplifier Schematic

Bell and Howell Filmosound 385 6V6 model schematic 1 cf272ab28b07

The original schematic for the 385 was killing me – just too many part numbers listed, so I cleaned it up a bit.  I also removed the projector circuits. I think there are two versions of this amp – this is the 6V6 version, while the other uses EL84s (which is nearly impossible to find … Read more