[Chris K]

Originally Posted by bandersen

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

Thanks so much Bob. Looks like the datasheet for the 12QP4 has an error maybe? It says pin 10 no connection but it's G2, the same as the 12JP4. Looks like things line up well. The 12QP4 might have a slightly larger screen diameter but looking at the chassis and cabinet, it shouldn't be a problem.