The 1965 Motorola "Cadet" Portable TV!

[wa2ise]

I've used combo tubes like this horiz output pentode and damper diode in audio amps. The pentodes used as single ended (class A) audio power outputs, and the damper diodes as rectifiers. With a pair of these tubes, I built a full wave rectifier circuit and stereo outputs.

[Electronic M]

Originally Posted by wa2ise

I've used combo tubes like this horiz output pentode and damper diode in audio amps. The pentodes used as single ended (class A) audio power outputs, and the damper diodes as rectifiers. With a pair of these tubes, I built a full wave rectifier circuit and stereo outputs.

If someone were to give me a bucket of compactron (and the similar lower pin count version whose name escapes me) sockets, ooh the things I could build with the odd ball tubes in my stash...

[dieseljeep]

Originally Posted by Electronic M

If someone were to give me a bucket of compactron (and the similar lower pin count version whose name escapes me) sockets, ooh the things I could build with the odd ball tubes in my stash...

You're thinking about "Novars". RCA's little trick to get around making a 7591 into a 7868, without having to buy them from Westinghouse.
They use the novar base on all kinds of sweep tubes and a few others.