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#1
10-09-2019, 03:39 PM
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Q: Predicta pedestal contrast
I'm working a predicta pedestal, which is going fine - re-capped it and replaced most of the resistors and some of the tubes - more tubes to come. The contrast control has almost no effect though, so I was wondering what might cause that.
The CRT is a 21FDP4 which tested OKish - I had to renovate the filament though, and the tester manual says that contrast is one of the things to go on well used CRTs. I guess I should also check that the pot is OK. Anything else I could look at?
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#2
10-09-2019, 05:15 PM
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Apparently tuning it in properly helps a lot!
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