Re: Spectrum advice
I did read on another forum a while back where someone had to change the electrolytics to get it going. It may be worth starting there changing 1 or 2 at a time.
That's an Astec modulator, perhaps a search of the part number might throw up a result on whether it's UHF or not? If you have a scope you ought to be able to see the composite signal going into the modulator if the computing side is working
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