Strange tube

[Wavebourn]

It looks like a power am IC.

[Chris Hornbeck]

50uA/V ! Wow, now I've seen everything.

I've heard stories that the Russian MIG fighter jets used multi-section valves like this, and maybe still do. They're immune to the EMP of a nearby nuclear warhead (good luck to the pilot of course). Could even be true, dunno.

Thanks,
Chris

[riccoryder]

If they could come up with a non-emitting sleeve to put between the heater and the cathode, tied that to the filament to act as an anode and made the cathode so the inside could emit too (or just added a diode section connected to those places), there could be a rectifier and still have just 9 pins. For some reason I'm visualizing a shaded-pole phonograph motor with added coils for the filament and plate supplies. If semiconductors had never developed on this planet, I wonder what tubes could have evolved into? I remember a time when rebuilding machines for c.r.t.s were being offered for t.v. repairmen to do their own simple electron gun replacements and thinking if would be fun to roll my own mutant tubes. I once wanted a crt a rebuilder didn't have and talked them into to installing a gun with a different type of base on mine. It worked well after wiring in a new socket. There's a video on Youtube of a guy making some primitive triodes.

[revintage]

This is the Hagström amp I talked about. Straight from the IC amp Wavebourn showed. The real tube has the same envelope as an EL84 maybe somewhat longer.



As I said before, the best substitute IRL is two ECL82 with a resistive divider for the triode used to get 0dB gain.

[pilovis]

Look at this, it is in italian but I hope the schematic should be comprehensible for everyone:

http://www.leradiodisophie.it/Downlo...del-ciotto.pdf

ECLL800 - 2.4 W "One tube" Push Pull amp.

ECLL800 is a sort of "tube integrated circuit"