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

RCA 8x71-AM/FM
#1

Hi Guys,
I've got a good one here. AM works fine (after recap ant tube replacement). When tuning FM the dial positions are WAY off. 103.5 comes in all the way on the left of the dial with the tuning cap almost totaly closed. I can even pick up some airplanes Icon_e_surprised on the right side of the dial.
The problem is that I don't know how to adjust this. It doesn't adjust like AM. In the alignment instructions it says to adjust the osc. coil by bending it. This coil is firmly glued to a plastic rod which looks original. Any ideas where to look?

Thanks,
Eric
The schematic:
http://www.nostalgiaair.org/Resources/251/M0015251.htm

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

#2

There are articles on FM, and someone recently posted a link here on this Phorum.
Maybe Ron remembers.
And, yes, AM generator (regular RF gens that we all have) will not work.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
1930s Stewart-Warner Tombstone Radio need help identifying model number
Another Update: I found a couple of damaged coils inside this radio that might have something to do with why this radio ...captainclock1988 — 10:51 PM
6TPZ and 5TPO Radio Help
If you are still on 5TPO, you lost me there. What X7? What Points 1 and 2?morzh — 08:37 PM
6TPZ and 5TPO Radio Help
Quick progress report: X7 is broken. Only one leg soldered, the other missing and the diode is cracked. I've replaced...R3Sons — 05:05 PM
6TPZ and 5TPO Radio Help
Oh...and you have electrolytic caps there. All need to go and be replaced.morzh — 04:36 PM
6TPZ and 5TPO Radio Help
Thanks, will do.R3Sons — 01:25 PM
1930s Stewart-Warner Tombstone Radio need help identifying model number
UPDATE: I was able to pick up a signal generator on the cheap (amazingly enough) on feebay and I did an IF alignment fol...captainclock1988 — 09:53 AM
Philco 91 Schematic
Hi Rod, The resistor connects to pin 4 and the ungrounded side of block 9. From pin 9 of the RF tube to one side of ...dconant — 09:34 AM
Just got a 49-1613 need to know...everything!
I just found your post. I have this exact same model, and have had it since 1985 when I was 15 years old! I performed a ...MuzzcoVW — 09:11 AM
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM

[-]
Who's Online
There are currently 7621 online users. [Complete List]
» 1 Member(s) | 7620 Guest(s)
Avatar

>