Useful audio tubes from an HVS?

[Duke58]

Greetings,
I recently got ahold of a Keithley High Voltage Power Supply, Model 242.

Among other good tubes, (12AX7, 0B2), it has a good 8165 tube, 3B24W, 7235, 0G3 and 6X4.

Are any of these good for audio amplifier use?

Thanks!

 

[rayma]

I recently got ahold of a Keithley High Voltage Power Supply, Model 242.

It would be a shame to destroy this supply just for the old tubes.
If you don't need 300+VDC, why not sell it and buy new tubes.

 

[Duke58]

Not worth it for me. I've got two other high voltage power supplies and it's not worth the $200 I can sell this HVS for. I'll have to pack and ship, deal with tire kickers.

How does pulling the tubes destroy the power supply?

 

[Duke58]

Got it- the 8165, 3B24W, 7235 tubes are not useful for audio.

I'll keep the Amperex 12AX7's, 0B2's, 0G3, 12B4A and 6X4.

Transformers and switches will be repurposed for audio projects.

 

[Jazid]

Well at least you can check the tubes on your still functioning curve tracer and see if they will hack it for OCD audio use.
It is a miserable waste of a nice piece of lab equipment though I accept money is money. If it was this side of the pond I'd take it at asking!

 

[Duke58]

Okay, I understand that tube harvesting seems like blasphemy, so I'll look into buying some more tubes and keeping the HV power supply with the other two I have.

I also have an HP 711A with two 6L6GB tubes and a Fluke Model 408B HV power supply. They both work so well that I couldn't get rid of them or scavenge parts from them until they die. Shipping them from CA across the pond would cost more than they are worth.

OCD Audio is going to be the name of the next amp I make. Thank you for the suggestion.