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48-472-122 FM issue
Eric Adams
Phorum Expert
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Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages State, Province, Country: Florida
#1

02-14-2019, 04:25 PM
Hello Everyone,

I'm working on a really nice 48-472=122. I replaced all caps, tested resistors and tubes, aligned. The problem is, AM works fine. Fm, not so good. I can pick up my local stations fine except that they are very faint. Until I put a screwdriver to pin #8 of the 14F8. Then the volume goes up to a normal level. Any thoughts?


.pdf usa_philco_48472_sch1a.pdf Size: 69.67 KB  Downloads: 132
.pdf usa_philco_48472_sch1b.pdf Size: 57.3 KB  Downloads: 108



Thanks,
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org

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Messages In This Thread
48-472-122 FM issue - by Eric Adams - 02-14-2019, 04:25 PM
RE: 48-472-122 FM issue - by PhilcoMike - 02-14-2019, 04:47 PM
RE: 48-472-122 FM issue - by Eric Adams - 02-14-2019, 04:54 PM
RE: 48-472-122 FM issue - by PhilcoMike - 02-15-2019, 04:50 PM
RE: 48-472-122 FM issue - by Radioroslyn - 02-15-2019, 08:18 PM
RE: 48-472-122 FM issue - by Eric Adams - 02-20-2019, 11:32 AM
RE: 48-472-122 FM issue - by EdHolland - 02-20-2019, 02:47 PM



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