Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  
previous: Kevin STP Thats a tough one Dan.If it is a co... -- 1084732963 View Thread

Re: Fender "75" mods

5/17/2004 2:43 PM
John GRe: Fender "75" mods
There is a possibility that the opto coupler in the cold leg of the lead ch M/V is not working. Check to see if the volts change on the led side when the f/s is activated. When the lead ch is selected and the volume is high try the lead m/v control, if there is no control then it is the opto or wireing or the f/w. Putting a temp link from the cold end of the M/V pot to grnd should make the control function correctly.  
Also check for dry joints around the opto.  
John G

Kevin STP Thanks John,I have been wondering i... -- 5/17/2004 7:44 PM