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Old 08-10-2008, 10:30 PM   #9 (permalink)
amplifier
Senior Member
 
Join Date: May 2008
Posts: 118
Re: Marshall Valvestate, Messed Up

Quote:
Originally Posted by Stretchy View Post
Hey there Amplifier... I love to learn new things and you seem to know way more than me. So here it goes... what does it means when I tube goes "microphonoc" ?

Thanks!
Sure thing buddy ol' pal. When a tube goes microphonic you can get bad feedback (edit even with your guitar turned down)or certain frequencies will continue to ring out, like when FiliphSlim mentioned it sounds like it has a reverb effect on. You can also see if it's going microphonic by tapping the tube w/the eraser end of the pencil slightly. You'll hear it through the speakers but if it continues to ring it's going bad.
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