8000 - any use for anything?

[OldHector]

I inherited a box of old tubes from an old electrical repair shop that was in a building planned for demolishing. Apart from a lifetime's supply of UY11 tubes (that would be more than 1!) and store cupboard essentials such as EN32/2050 ... ;-) ... there were a couple of transmitter triodes 8000 in RCA boxes.

I'd assume they were replaced as part of routine maintenance, so probably used. They are dated from the 50's.

Looking at the tube data it looks like they could be used without having to have Frankenstein re-animating voltages - say 750V - so I was wondering if they could potentially be useful.

 

[PRR]

Nightlights.

 

[academia50]

Everything can be used, assuming they are not exhausted ...
If it's worth it, it's another song .....😉

review33 - 影音天地: RCA 8000 Tube SE Amplifier, 50Watts Class A Output

 

[PRR]

Those plans look like 1,000V of B+. Hector seems reluctant to go 750V, and may be wise.

The alternative is like 500V on plate and BIG power (current) into the grid. But it is very easy to need more grid-drive power than you can get out of the plate. And the grid is a very ugly load.

 

[HollowState]

Most transmitting triodes (within reason) can be made to function as audio amplifiers if the effort is put forth. The Japanese have been doing this for years. If you can't use them yourself, put them on ePay. They will sell to someone. They're actually a low mu 810.