Amp issue

[Arjankoster]

Hey guys,

first of all my apologies if this thread is located in the wrong part of the forum, I'm new here.


Anyway, I have one of those ancient Marshall 5506 amps. Today I used my roommate's Boss distortion pedal (the guitar one) on my rig, just for fun. However, when I unplugged the pedal, the amp didn't respond anymore!

Now it just amplifies my bass at random intervals for about one fifth of a second, almost like a loose contact or something.

The amp has a send/receive setup for the effects on the front, so the bass is still directly plugged into the amp.


Any ideas?

[Windreaper]

Did you use the FX loop to connect the pedal? Try inserting a patch cable between the FX send and return and see if it fixes the problem.

[Arjankoster]

Yeah that fixed the problem, but I still think it's weird :P

[lbwdog]

Try jiggling a 1/4" plug in and out of the jacks a few times, preferably with some contact cleaner spayed on it.

[Dekker]

Sounds like your amp's FX loop in or out jack has a stuck contact. It still thinks a plug is inserted, therefore bypassing the regular amp chain and sending the signal through the send/return.

If lbwdog's suggestion did not work, if you are skilled (and careful ) with electronics, you can pop the top and check out the jacks from the inside.

Ultimately, you need to find a way to identify which jack it is, and get it unstuck...