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What do y'all do when storing an amp long-term? Remove tubes? Anything else?

Wondering what everyone is using for current-production KT88s today. I’ve had a quad of JJ KT88s that lasted a long time that I liked, but I’m not sure if the current production of those tubes is up to the old standard of quality.

Stupid me decided to try to swap out a quad of EL34s while I’m sick. I accidentally turned the bias pot the wrong way and the current shot up to about 170 mA for about 15 seconds before I realized what I had done and switched the amp off. Are these tubes toast, or is that too short of a time...

Quick question for Uber Ultra owners out there. I had a Twin Jet previously, but the external bias points are different on that amp. Using a multimeter, do I put the negative (black) lead in the point labeled Ground and the positive (red) lead in the points labeled V7, V8, etc.? Also, are the...

Anybody owned both? Is there much of a difference worth speaking of?

In case anybody was wondering…

I’ve had this 12AX7 for years now and don’t know what it is. Any ideas?

Looking for two of these. Thanks!

Wondering how this would do in front of my Bogner Uberschall as a boost. Thanks!

This one came off a Rev 2 Uberschall. It’s in perfect shape. Mounting screws included. $100 shipped via PayPal, CONUS shipping only. Thanks for looking!

Seems like a lot of the usual places don't carry them anymore. Where are people sourcing these tubes now?

Title says it all. Preamp tube for V5 is fine. There’s volume loss no matter what I do with plugging in cables and whatnot into the input jacks for the loop.

please delete [mod edit] Please read the rules mate. Title fixed according to rule #15. We don't delete old ads except under extenuating circumstances.

Looking to see how much these are going for now. This one was made in late 2009 and has the updated gain taper and cloth grille headshell in good shape with a few nicks on the tolex. It also has a KT88/EL34 bias switch installed by the former lead technician for Crate Amplification. Comes with...

Have a 2009 Uberschall Twin Jet that I turned on today, but I’m barely getting any volume. I put another quad of KT88s in there but I got no sound out of them at all. Checked all preamp tubes, but they are fine. Fuses are fine too. Any ideas on what to do next?

I have a FR-equipped guitar that has open and fretted string buzz on the G string. The other strings are fine. I took it to a tech to look at and he can't figure out what's wrong with it. I'm at the end of my wits with this guitar... any ideas about how to fix it?

Just fired up the Twin Jet today, and there is hum coming from the speakers, but nothing from the guitar. Any ideas on what it could be? EDIT: Seems to be working fine now. Not sure what happened...

It’s only intermittent and seems to happen more when the amp is just turned on. Any ideas about what it is?

I keep hearing rumors of a new Uberschall coming soon... anybody have any info on this?

Both used in perfect working order. CS-3 is $40, Carbon Copy is $70, OBO. Shipping is $10, will combine if bought together. Paypal/CONUS only please. Thanks for looking!