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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

I've got my own junk stash, but I know what you mean. So you know what tubes to avoid.

I've been buying up a lot of what I need to keep my old stuff going, and I've been acquiring a few in the hopes I can find a AA5 shockbox I like at Dayton Hamvention this year. I whittled what I had down but this is what I have left:

https://pic8.co/sh/n7mYSg.jpg

Mostly RCA, GE, Tung-Sol, Sylvania, and Raytheon, with a few Motorola and other makes in there. Had boxes of the things but who needs a case full of 6GH8?

[+] [deleted] • 1 pt