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Daave: "Are the large electrolytic capacitors really that expensive?"
Another source for electrolytics are BPC's (90's TV's) and monitors. I recycle them at the county "dump" facility, BUT only after i snip leads and pull out the chassis. Monitors have a few 160 volt caps from 47 to 200 mfd and I hide these under many a radio chassis. Junk black box Tv's get the same treatment and there are usually caps up to 350 volts. Your Zenith will need some in the 450 volt range and those do cost some $$$. Check the schematic to see what voltage is really needed rather than going by the OEM cap.
Good luck, Dave
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