Hiss/white noise in an amplifier

[sluckey]

Stand it on end on the right side wall as viewed from the rear. Any better?

[PRR]

>> It's not speaker magnetic field. It is acoustic sound waves. The tank pickup is a bad microphone...
> That makes perfect sense except that it also happens with zero volume, no guitar plugged in.

Where did Volume and guitar come in?

I'll try this again.
The tank pickup is a bad microphone...

[Diverted]

Stand it on end on the right side wall as viewed from the rear. Any better?

A little less feedback-y and unstable, yes. With a 12au7 in V2 I can now turn verb all the way up without it happening. Maybe a tiny bit more hum than having it laying flat but negligible.

[Diverted]

Got the anp’s Annoyances dealt with and handed it over to my friend. He loves it. Video here is the first song he played on it. A little boomy in spots but he was playing very loud and it’s a pretty dark guitar. Thanks for all the guidance getting it squared away!