Re: CRT book by Keller

Tom Lee

Not a dumb question at all! These were (supposed to be) working crts, so they pulled a vacuum. In the picture in Pete's book, though, there's no visible close-off nipple. I also don't see a getter, so the cathode didn't have a long life. But I would still want one (lit up and showing a trace, of course).


Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070

On 1/14/2021 19:01, n4buq wrote:
Maybe a dumb question, but did they pull a vacuum on the coke bottle?

Barry - N4BUQ

----- Original Message -----

From: "Tom Lee" <>
Sent: Thursday, January 14, 2021 6:32:05 PM
Subject: Re: [TekScopes] CRT book by Keller
The Coketron actually has no components inside the Coke bottle. It takes what
I believe is a 1EP1, sans screen, and mates it to a Coke bottle. It actually
has deflection plates (at least, that’s what I recall from visiting
Vintagetek, where they have one on display), so it has all the guts of an
electrostatically deflected scope crt.
I never saw one light up, though.
Sent from my iThing, so please forgive typos and brevity.
On Jan 14, 2021, at 3:47 PM, Jeff Dutky <> wrote:


That's what I figured. The neck of a Coke bottle is pretty narrow to get
much of a mechanism through.

-- Jef Dutky

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