[MRCA] PRC-25 Update 2

[Al Klase]

Hello Mark,

As you may have deduced from the deafening silence, not many of us have 
delved deeply into PRC-25.  I have some fairly superficial experience 
with PRC-77's.

These are sophisticated pieces of electronics, and are considerably more 
involved than, say, an ARC-5 receiver.

As you stumbled on to, once you have proper power, and it doesn't work, 
the first thing to do is re-seat all the modules and connectors.

My next step would be to get the -35 TM, and work my way through the 
trouble shooting "buzz charts."  See: 
http://www.radionerds.com/index.php/AN/PRC-25

You'll likely need an oscilloscope, and maybe a signal generator, in 
addition to a DMM and a counter.

Good luck,
Al

On 8/8/2013 7:32 PM, n1jzv at midmaine.com wrote:
> Well since it seems off about 50Khz as when I dial 50.95 the test set
> shows 51.0001 I suspect the A10(A40 for PRC-77)50Khz interval oscillator
> may be suspect.  My prc-25 has an A40 instead of an A10 so at some point
> it was replaced.  I'm wondering now if the A40 and the knob connection are
> off one click?
>
> Mark
> K1HF
>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/