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Old 04-13-2023, 07:20 PM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,779
Quote:
Originally Posted by Chris K View Post
I have an opportunity to buy a NOS 12QP4 Bob. Is it a direct replacement for the 12JP4? Do I need an ion trap for 12QP4?
Datasheet says it needs an external ion trap magnet. Here are the links so you can compare the dimensions.

https://frank.pocnet.net/sheets/127/1/12JP4.pdf

https://frank.pocnet.net/sheets/127/1/12QP4.pdf
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