What does a microphonic tube sound like? At volume levels past ~6, I'm getting what sounds like a high pitched vibration tone. It's not super loud, but definitely noticeable.
I'm 99% sure its the 5Y3 rectifier tube. It's very loose in the socket and vibrates when the amp is cranked past 5 or 6. I am going to retube this thing for sure, just because, so anyone know where would I get some retention clips?
Originally Posted by Commodore 64
Regular Fretter
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