Re: Ampeg VH140C

Posted by mnemonic on
URL: http://guitar-fx-layouts.238.s1.nabble.com/Ampeg-VH140C-tp30301p49067.html

I boxed up the pedal, pretty crammed-in, still oscillates above 3/4 gain if I have the guitar plugged straight in, but if I put a buffered pedal before it, no oscillation even all the way up.

I think I still have some gremlins to track down, it was working fine, then the bass control stopped working. Opened it up and nothing seemed amiss, closed it up and it’s working again. Probably a loose connection somewhere.

Also one error from what I posted above, I think in the original schematic the gain pot is 100k reverse audio, not 100k audio. I have 100k audio in there now and the taper seems quite natural though.  This wouldn’t change anything except knob position required to get a specific gain level, right?  

I played it though a KT88 tube power amp but the pedal has a lot of bass on tap and the additional resonance from the tube power amp was a bit much. I think this preamp sounds best into a solidstate power amp.