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#1
11-22-2016, 02:30 AM
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Zenith 9-90-01/9-90-02 modules
I'm wondering if there are any big differences between the two that would make the 9-90-01 module unsuitable for a 9-57-VCR project. I've been comparing photos of a 9-90-02 to my -01. The biggest difference I see is a couple more metal film resistors and a different pot on the -02. I have extra 9-57 modules I could strip for the adapter board.
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#2
11-22-2016, 02:10 PM
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IIRC 9-90 boards went up to -04.
IIRC one had a pot that a shaft plugged into, another just a screwdriver pot. Also had an 8 pin IC for the osc. I THINK the 9-57-VCR used an -03 board. We did put a few in. Best is find one & check it for any other changes that may have been made. With all the flat chassii out there I am surprised none of us has one. 73 Zeno  LFOD !
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