1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Threaded Mode
48-472 No FM
Eric Adams
Phorum Expert
*****
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages State, Province, Country: Florida
#1

02-10-2017, 01:39 PM
Hi guys,
I've got one that I've been working on for a while. All caps replaced, tubes tested. AM works great-nothing on FM.
Any ideas?

.pdf philco_48_472_sch.pdf Size: 178.87 KB  Downloads: 176


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

Website Find
Mondial
Phorum Expert
*****
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
#2

02-10-2017, 02:32 PM
If you input a 9.1 MHz FM signal from your 8601A into the first IF stage, do you hear anything?
Find
Eric Adams
Phorum Expert
*****
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages State, Province, Country: Florida
#3

02-11-2017, 12:00 PM
Would that be applying the signal at the antenna or where it states in the instructions? 
Thanks,
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org

Website Find
Mondial
Phorum Expert
*****
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
#4

02-11-2017, 12:11 PM
Where ever the alignment procedure says to input the 9.1 MHz IF signal for alignment should be fine. What you want to find out is if the IF or FM detector is the problem, or its the FM local oscillator that's causing no reception.
Find
Eric Adams
Phorum Expert
*****
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages State, Province, Country: Florida
#5

02-11-2017, 02:11 PM
Great. Thanks. I'll check it later today and let you know.
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org

Website Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco model 60
Yes, Mark belongs to the same Michigan Antique Radio Club that I do. I suspect that the oscillator coil is in need of a ...Radios1340 — 03:10 PM
A Marconi model 86
Yeah. I am dreading the thought of what to do with all my consoles when I will no longer be able to move them around. I...morzh — 02:51 PM
1947 Silvertone 7086 Wire Recorder/Phono/Radio on YouTube
Cool gadget, Buzz. I took me a couple of second to undestand that that oscillating thing makes the wire to spool correc...morzh — 02:50 PM
A Marconi model 86
My back hurts already, you could build a house with all the wood. PaulPaul Philco322 — 02:49 PM
1947 Silvertone 7086 Wire Recorder/Phono/Radio on YouTube
Part 4 of this series now uploaded link below to anyone interested Buzz — 02:39 PM
Philco model 60
Welcome to the Phorum, Radios1340!  The oscillator coil on the 60 is a common culprit.  I just bought a 60B (June 1934) ...GarySP — 02:33 PM
Philco model 60
Yes, standard alignment procedure. I can get the minuscule tone to vary when adjusting the trimmers. But you almost have...Radios1340 — 01:40 PM
A Marconi model 86
An imposing-looking radio, for sure.morzh — 12:43 PM
Philco model 60
Model 60 struck again :lol: Welcome to the Phorum! Above is the article on Model 60. Could be of some use. Now...morzh — 12:38 PM
A Marconi model 86
Ooh, very nice!jrblasde — 12:19 PM

[-]
Who's Online
There are currently 7012 online users. [Complete List]
» 3 Member(s) | 7009 Guest(s)
AvatarAvatarAvatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration