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The RCA 885 Thyratron is an Argon filled three-element tube used in pulse and switching circuits. Roughly equivalent to a modern SCR, this device will momentarily short when triggered, allowing charge to dump for a high-energy pulse or to help restart the next cycle in a sweep circuit.

This tube was designed for oscilloscope use and was purchased as a spare for my 1936 RCA 151. It was produced as part of the war effort. It's new old stock.

Interesting thing about tubes is there's so many of them still available in the USA because we just made shitloads of them up until the 80s. This is in contract to most other countries where stock has become depleted.

The RCA 885 Thyratron is an Argon filled three-element tube used in pulse and switching circuits. Roughly equivalent to a modern SCR, this device will momentarily short when triggered, allowing charge to dump for a high-energy pulse or to help restart the next cycle in a sweep circuit. This tube was designed for oscilloscope use and was purchased as a spare for my 1936 RCA 151. It was produced as part of the war effort. It's new old stock. Interesting thing about tubes is there's so many of them still available in the USA because we just made shitloads of them up until the 80s. This is in contract to most other countries where stock has become depleted.

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[–] • 0 pt

Nice!

Telefunken didn't really sell a lot of tubes in the USA, they had some radio sales in the 60s but it was just kind of an unknown name so they didn't do well.

That's good to hear you can still get the stuff. I guess the last people I spoke to (non-USA) about that were in Britain, and they indicated that tubes were scarce. Here, we made so damn many during the war that you still find war-contract stuff.

If you're looking for cheaper tubes for the preamps, avoid the 12AX7 that everyone loves. You can get things like 12SN7 or some of the old octal single-triode audio amp tubes at odd voltages for a song. People love 6V tubes, 25V tubes? Not so much.

[+] [deleted] • 1 pt