Posts: 823
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Joined: Aug 2012
City: Lake in the Hills, IL
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
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 7,213
Threads: 266
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: 823
Threads: 111
Joined: Aug 2012
City: Lake in the Hills, IL
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
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 7,213
Threads: 266
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: 1,118
Threads: 21
Joined: Jan 2014
City: Wellborn Florida
The selector switch on those sets can be a pain. Try giving it a good cleaning.
Posts: 823
Threads: 111
Joined: Aug 2012
City: Lake in the Hills, IL
I checked it again. @ 98 it comes through all over the dial. Does that tell you anything?
Eric
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 823
Threads: 111
Joined: Aug 2012
City: Lake in the Hills, IL
I cleaned the switch very thoroughly. No change. Thanks.
Eric
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
Posts: 823
Threads: 111
Joined: Aug 2012
City: Lake in the Hills, IL
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
Lake in the Hills, IL
Member: Philco Phorum, ARF, ARCI & Radiomuseum.org
