Name: Steve Kennedy
Email: steve@pacair.com
Subject: Lost tremelo
Thread: 27
Time: Fri, 1 Mar 2002 20:50:26 UTC
The tremelo circuit uses an LDR assembly to operate (Light Dependent Resistor and a light bulb housed together in a single assembly). The light bulb burns out and *poof*... no tremelo!
I have never attempted a repair one or figured out if another sort of device could be made to substitute for this LDR so I don't have anything I can offer if that is your problem.
The other thing that goes wrong (assuming it isn't a footswitch problem) is an open-frame adjust pot for the Trem circuit. When adjusted properly, you get simple tremelo up to about 5 on the Intensity knob, then a "double trem" that sounds more like a Leslie after "5" on the knob.
If the trimpot gets corroded or dirty, this whole circuit can stop working. Open the amp and clean the pot and check it for proper operation. If it seems to be OK, then the LDR is probably at fault.
Steve