I realized that I didn¡¯t see any CRT filament/heater glow in this newer 7603 so I put the working PSU in the other 7603 and in that scope I see the CRT is glowing. I can see a dot on the CRT screen for one second the moment I start it up then it¡¯s gone. Got nothing on the horizontal deflection plates on this other older beat up 7603.
I would really like to get the newer 7603 up and running since it¡¯s in very good shape and if got the readout board which my other 7603 is missing. I¡¯m planning to use my 7L5 (which I was lucky enough to score on eBay recently) in this 7603.
I¡¯ve replaced the CRT in the older 7603 before (it was cracked when I received it) and hoped that was the only problem with it but when it had some other issues and since it was lacking readout option I didn¡¯t spend any more time on it.
Anyone who knows a spot where I could measure the 6,3VAC filament/heater for the CRT? Looks like it¡¯s elevated almost 3kVDC above ground?!
