Tremelo LDR light

steve, my tremelo has gone out on my hd-130 212 and i found in the archives where you mentioned that the ldr light can be the problem if its out. i looked inside and found the only light, its half encased in white and one lead going the the ground switch and the other going to the main fuse. I turned on the amp and this light did not glow. is this the light you were refering to? it appears to have a small capacitor inside. do you have these or can you point me in the direction? by the way, the archives are a gold mine of information, thanks.

I mispoke on that post... I was thinking of another amplifier! The Music Man tremelo circuits are a transistor oscillator driving an FET as the output device. It is more likely you have a dirty pot or a bad transistor.
Music Man DID use LDRs (2 of them to be exact) in the Phasor circuit contained in the RP series and the 75 & 150 series amps.
Steve

That is not a light,it is a mercury switch.
Look for a bad LM307H Transistor.