Bass guitar amp switch problem

[HairyManBack]

I have a trace elliot bass amp. There is a momentary switch for cutting on and off the 12 band eq. Sound passes through the amp when its on, but when i turn it off it pops and no sound passes through it. So i tested c30, r65, r66, and r67 and they all were fine. So it must be the relay right? The only identification is 47w/6 on the top of it. In the parts list on the schematic it only says 30amp relay (which i dont think 30 amps is going to it anyways). Any suggestions on finding a relay. I have the pdf of the schematic.

[randtek]

Re: Bass guitar amp switch problem

That relay is just switching a small signal, so 30 amps is definitely overkill by a huge factor. They probably just want to keep their parts stock required to a minimum, and they use the same relay for other things. You can probably use about any 12V relay, as the actual current being switched is going to be minimal. If that relay is identical to RL1, you could swap them in the circuit to confirm the relay as your problem. If the problem changes, you know the relay is bad.

If you substitute a relay, you will probably have to figure out how to mount it and wire it into the circuit, as it most likely won't fit directly into the board in place of the old relay.

[budm]

Re: Bass guitar amp switch problem

Check the DC voltage on the coil to see if it does change state when you activate/de-activate the bypass switch.

[HairyManBack]

Re: Bass guitar amp switch problem

Thanks, will do. I will post when i test it.