[MRCA] PRC-25's converted to PRC-77's: (was Re: CH-54 -> CAP Radios 50 years ago)

[Tim]

Thanks Mark - Starting to make sense... I think what you probably had were
RT-505B/PRC-25 radios.  There was a "B" modification of the  basic PRC-25
to enable wideband audio/digital/crypto to incorporate the radio into the
AN/PCC-1 system.  300 - 20 kc wide audio bandwidth...It could handle multi
channel voice and digital baseband signals simultaneously.  The RT-505B
modification retained the vacuum tube PA stage and its HV oscillator to
generate the 125 VDC necessary to power the tube.

I thought only the USMC had those, the one I have was modified at the USMC
Barstow facility and it was retagged RT-505B/PRC-25.   Interesting that the
Army had those as well - it's usually the other way around!

I have some additional info on that audio/IF amp/IF Filter modification and
the peripheral system equipment on my website if you're interested:
http://www.n6cc.com/prc-25-radio

Thanks!  Tim
N6CC

On Thu, Sep 5, 2019 at 4:58 AM WW2RDO via MRCA <mrca at mailman.qth.net> wrote:

> KY-38 NESTOR was long gone from the inventory when I served.  We used
> KY-57 VINCENT with our PRC-77s
>
>
> While tagged as PRC-25 radios, all of our radios were actually PRC-77s
> The PRC-25s had been electronically upgraded, and all our radios tuned to
> use the KY-57 and were used with our Light TACFIRE system.
>
> Mark D.
> WW2RDO
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