Tube Amp "Ringing"

The best suggestion for low noise tubes are any brand sold by a highly reputable tube seller. You can be assured that any tube sold by Andy at VTS will be low noise, regardless of brand or model.

BTW, I would first look at your NOS Black plates as the possible source of the microphonic tube. As Newbee mentioned, just gently tap each tube with a pencil eraser. If you tap a microphonic tube, it will obvious.

Tvad,

You answer my question, on just how to figure "which" tube is the "ringer", now to find a pencil with an eraser. The NOS RCAs are my "newer" tubes, but nevertheless we'll see what happens. One more thing, do you have a link for TVS? Might try giving Andy a call and see what he's got.

btw, to Everybody

Do appreciate all the info you're giving me. As I said I'm a "newbie" and still learning.

Vintage Tube Services contact info.

The RCAs are the most likely culprit because despite them being newer to you, they are in fact the older tubes. Brand spanking "new" NOS tubes can be microphonic.

It's an easy matter to check them all, right?