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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 should get one, especially if I want to use it. These machines are getting pretty scarce, I don't think I've seen one at an electronics show for probably 20 years now.

[–] [deleted] • 1 pt

Better buy the one he has left now then, Ed is a busy guy with a shitload of items he makes so the stuff sells out almost immediately. I am amazed he has one in stock now frankly. The CocoSDC sells out within a day every time he builds a batch.

[–] • 1 pt

I'll take that into consideration and see what the wallet says. Thank you again.

[–] • 0 pt

Ordered. I used some of my Hamvention money.

[–] [deleted] • 1 pt

Oh sweet, congrats on your fancy new mechanical-switch keyboard. I'm jealous, I really want to put one of those on a Coco1 I have, along with a CocoVGA upgrade. But I'm saving the shekels for the next balloon payment.