Memory Tech you don't see very often

Joshua Rice rice43 at
Thu Jan 6 02:19:52 CST 2022

Not cost effective at nearly $10,000! I understand they're very rare, 
given they were only used for a few years in industry and they're 
clocking on 3/4 of a century old, but even then, that seems an order of 
magnitude or two off the real value.
Actually, looking them up, doesn't seem they were used in much at all. 
Seems to have been a bit of a technological dead-end since core memory 
quickly superseded it with it's (relatively) cheap costs and (relative) 
ease of manufacturing. I imagine the US gov. probably used them 
somewhere, since they were a sucker for cutting edge technology of the 
Would be interesting to know how many hours it's got on it

------ Original Message ------
From: "pbirkel--- via cctalk" <cctalk at>
To: "'General Discussion: On-Topic Posts'" <cctech at>
Sent: Wednesday, 5 Jan, 2022 At 17:35
Subject: Memory Tech you don't see very often
Selectron Vacuum Tube: 

Really nice photo-shoot! I wonder what the back-story to this particular
tube might be.

I don't think that $16.18 shipping would be, um, adequate protection by 
Cheap, but not so sure about "cost-effective" .


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