1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
48-472-122 FM issue
Eric Adams
Phorum Expert
*****
Posts: 823
Threads: 111
Joined: Aug 2012
City: Lake in the Hills, IL
#1

02-14-2019, 03:25 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: 107
.pdf usa_philco_48472_sch1b.pdf Size: 57.3 KB  Downloads: 86



Thanks,
Eric
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org

Website Find
« Next Oldest | Next Newest »


Messages In This Thread
48-472-122 FM issue - by Eric Adams - 02-14-2019, 03:25 PM
RE: 48-472-122 FM issue - by PhilcoMike - 02-14-2019, 03:47 PM
RE: 48-472-122 FM issue - by Eric Adams - 02-14-2019, 03:54 PM
RE: 48-472-122 FM issue - by PhilcoMike - 02-15-2019, 03:50 PM
RE: 48-472-122 FM issue - by Radioroslyn - 02-15-2019, 07:18 PM
RE: 48-472-122 FM issue - by Eric Adams - 02-20-2019, 10:32 AM
RE: 48-472-122 FM issue - by EdHolland - 02-20-2019, 01:47 PM



Users browsing this thread: 1 Guest(s)
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration