I know this is a bit off topic but as a resident of rec.audio.pro I thought
some of you with guitar experience would have some ideas here. I posted in
alt.guitar but no-one has responded.

I just aquired a Rickenbacker 360 on ebay and am very happy with the guitar
except...

When you play it through a loudish amp or turn any sort of drive on (I mean
just a little) it howls like a wolf. Sounds like the body is resonating to a
certain note like blowing down a pipe. Makes it impossible to use in a live
situation.

Are they all like this or do I have a problem here!?
If they are like this how the hell do I stop it happening or how do people
use them live? Is there a fix? Does blocking the F-holes make any difference
or do I need to stuff the inside of the guitar somehow?

thanks,

Martin