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Circuitry had me fooled.
Jim Dutridge
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Posts: 325
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Joined: Mar 2007
City: Toledo State, Province, Country: OH
#1

03-28-2025, 02:04 PM
I was working on the Monitoradio that I bought earlier this month because when I first tested it I had no sound. Going by the Sams lit I found all voltages and resistance checks were normal. I could even force a strong IF and RF signal thru it. So why did I have no sound? looking at the bottom of the chassis and the picture in the Sams I noticed that there were extra parts that did not show up in the Sams, even a dual control. Turned out that this model, PR-155B2, has a squelch control installed. Receiver works just fine.

   

   
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klondike98
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Posts: 5,199
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Joined: Nov 2012
City: Wilsonville State, Province, Country: OR
#2

05-26-2025, 12:39 AM
Nice sleuthing!
Cheers,
Bob
[Image: https://www.dropbox.com/s/5m63ib99yfx2eg....jpg?raw=1]
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RodB
Phorum Expert
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Posts: 1,159
Threads: 46
Joined: Feb 2015
City: Roseville, MN
#3

05-26-2025, 12:07 PM
Noise? I don't hear any noise.
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Jimradio
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Posts: 203
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Joined: Jul 2016
City: Spring Lake MI
#4

05-27-2025, 07:50 AM
HI Jim,
I found one of these last summer, haven't taken the time to go thru it. Thanks for the post.
Jim
Spring Lake MI
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)