[MRCA] PRC-127

[Ray Fantini]

It's pure speculation on my part not having worked on a 127 before but most synthesized radios built around that time are designed around an internal fixed reference oscillator and a programmable divider chain that controls a PLL. Being that the radio will channel and if it accepts program changes would assume that the divider chain and PLL are all working and it may just be that your reference oscillator is not on frequency. Be cautious because a small change in the reference oscillator will result in a big change in operating frequency. Al lot of stuff produced back in the seventies and eighties worked with reference oscillators in the 5 or 10 MHz range. Newer radios used sealed reference oscillators but things that old often had discreet component oscillators. But if you can enter new channels and the radio is somewhat on channel the synthesizer is working so don't mess with things like the VCO or PLL system because that will only get you in trouble, good luck.
Ray F

-----Original Message-----
From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Robert N. Newberry
Sent: Monday, July 29, 2013 10:07 PM
To: mrca at mailman.qth.net
Subject: Re: [MRCA] PRC-127

I should of specified by high in frequency I mean frequency error.



On 7/29/2013 10:08 PM, fred anderson wrote:
> There is an old DOS program call ham n eggs which reprogrammed the PRC 
> 127 to the Ham Band
> 
>  
> 
> Fred KB4DMQ
> 
>  
> 
> From: mrca-bounces at mailman.qth.net 
> [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Robert Newberry
> Sent: Monday, July 29, 2013 4:18 PM
> To: mrca at mailman.qth.net
> Subject: [MRCA] PRC-127
> 
>  
> 
> I have a PRC-127 that is a little high in frequency. I've skimmed thru 
> TM
> 11-5820-1048-24 but I didn't see anything about adjustment.
> 
> Anyone know where to find adjustment info? 
> 
> Apparare Scientior
> Paratus Communicare
> -N1XBM
> 
> 


--
Apparare Scientior
Paratus Communicare
-N1XBM
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