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Philco 366 problem with filter choke
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03-22-2009, 12:32 PM
Hi All- I am restoring a Philco model 366 (U.S. 66) cathedral set, and I am having trouble finding the value for the winding on the filter choke. I have scoured through all the Canadian and U.S. schematics and no drawings or charts list that. Would anyone have a measurment from one?

The problem I am having is that both before and after replacing all the filters, capacitors, and out-of-tolerance resistors, I still have a loud 60 cycle hum all the time. If I disconnect the filter from either side of the choke, and subsitute in a much larger value cap, the hum gets a lot less. If I put in a 150uf cap, the hum disappears altogether. The resistance across the choke seems low- less than 20 ohms. Does this sound like the problem? Icon_confused:

Brad
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Messages In This Thread
Philco 366 problem with filter choke - by Guest - 03-22-2009, 12:32 PM
Re: Philco 366 problem with filter choke - by Guest - 03-23-2009, 12:34 AM
Re: Philco 366 problem with filter choke - by Guest - 03-28-2009, 01:42 AM



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