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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

Yeah, I'm familiar with drivewire, I just never really had an interest in doing it because anything I want to run, I just emulate. I probably should try to pick up a replacement keyboard for it, if they still exist - I wore out a 16K and a 64K CoCo II because of the cheap inner membrane RS used on the keyboards.

[–] [deleted] • 1 pt
[–] • 0 pt

Very nice, thank you.

[–] [deleted] • 1 pt

It's expensive, but the alternative is to try to snag a keyboard used off ebay, and I kinda hate the guys who strip these machines to part them out. Also, the mechanical switches are the best on these new ones.