Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
Hi Guys,
I have an interesting problem that is driving me crazy. On this AM/FM radio I have replaced all caps, tested the resistors, tested the tubes and replaced 2. I aligned it, both AM and FM with a VTVM and everything checked ok. The problem is that AM works great, but FM will not pick up any stations. Only dead air anywhere on the dial. Is there anything that anyone can think of? Any help will be appreciated.
http://www.nostalgiaair.org/Resources/572/M0025572.htm
https://www.radiomuseum.org/r/zenith_h7 ... h02z2.html
Thanks,
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 7,284
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
So I'm a little lost. If you did the alignment for the FM section was it working then??
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
Hi Terry,
That's what is driving me crazy. The alignment went just the way it was supposed to, but just dead air.
Thanks,
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 7,284
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
So you can pickup the FM signal from the generator @ 98mc?
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified: 11-26-2018, 07:33 PM by Radioroslyn.)
Posts: 1,186
Threads: 24
Joined: Jan 2014
City: Wellborn Florida
The selector switch on those sets can be a pain. Try giving it a good cleaning.
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
I checked it again. @ 98 it comes through all over the dial. Does that tell you anything?
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
I cleaned the switch very thoroughly. No change. Thanks.
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 825
Threads: 113
Joined: Aug 2012
City: The Villages
State, Province, Country: Florida
Happy new year everyone. Sorry it took a while to get back to you, but after reading, searching the internet and pulling my hair out, I found the problem. It was a bad cap on the FM osc. coil. I replaced it with a cap from a junk chassis and all is fine.
Thanks to everyone who had some input.
Eric
The Villages, FL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
Model 96 cabinet veneer
|
| I can't figure out what the first step is, let alone the final step. I have tried copying pictures from my hard drive a...TGLager — 01:40 PM |
|
Philco 38-2 Low Volume
|
| I managed to get some more time on this.
Hi Mr. FixIT,
The radio has been recapped. Many of the resistors were rep...dconant — 01:39 PM |
|
Philco 38-2 Low Volume
|
| Thanks guys for the help. I started looking at these points but I have to quit for the day. I will be looking into this ...dconant — 12:23 PM |
|
RCA WV-98c
|
| Check out this crazy zero pot operation. Touching it drives it crazy. Its rubber tipped. Also the 6al5 has no negative v...daveone23 — 12:08 PM |
|
Philco 38-2 Low Volume
|
| If you check all of that and still have a problem (my first inkling would be one of the 6F6s) then look at the 6J5 phase...RodB — 10:44 AM |
|
RCA WV-98c
|
| Those will probably depend on teh switch combination.
Could you list some that you see, their values and what they sh...morzh — 10:26 AM |
|
Model 96 cabinet veneer
|
| You are probably skipping the final step. Once you select the photos you want and they get downloaded, the system assign...RodB — 09:36 AM |
|
RCA WV-98c
|
| At this point, there is no input, just internal voltages
Which are incorrect and not sure what they should be.daveone23 — 09:15 AM |
|
Philco 38-2 Low Volume
|
| Hi DConat,
Generally, the lower the plate voltage the less negative the grid voltage has to be. Since the plates an...MrFixr55 — 09:27 PM |
|
RCA WV-98c
|
| If I had it in front of me, I would triy to trace the signal on one of the non-working functions.
Try to trace and high...morzh — 08:21 PM |
|
Who's Online
|
There are currently 1231 online users. [Complete List]
» 1 Member(s) | 1230 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
