[Milsurplus] 1960s ATC Transmitter

[Jim Whartenby]

I was in Ground Radio from 1968 to 1972.  The MPN-13A was the GCA van at Mactan, Philippines.  Comm for USAF was UHF via the ARC-27 or more properly, the GRC-32 since it was ground based with the MPN-13A supplying the 28 volts.  VHF was via the ARC-3 but that was for use for communicating with the Philippine Air Force F-86 fighters and perhaps their DC-3s.  I believe that both are about 10 watts on transmit.
When I went to Germany, there was no VHF, it was all UHF.  GRT-3 and GRC-27 were the tube powered 100 watt transmitters and very heavy, as I recall.  Later, just as I was getting out of the AF, the long promised solid state equipment started to arrive.  I think that Mactan and Zweibruken both closed in 1991 and are now civilian airports.Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Thursday, May 21, 2026 at 02:13:54 PM CDT, Mark K3MSB via Milsurplus <milsurplus at mailman.qth.net> wrote:   

 USAF VHF.
On Thu, May 21, 2026 at 2:19 PM Nick England <nick at navy-radio.com> wrote:

Army, Navy, or Air Force??

For the Navy it was AN/SRC-20  (100w AM 225-400MHz)
https://www.navy-radio.com/xmtrs/uhf/src20-31.JPG

Nick England K4NYW
Chapel Hill NC
www.navy-radio.com

On Thu, May 21, 2026 at 2:01 PM Mark K3MSB via Milsurplus
<milsurplus at mailman.qth.net> wrote:
>
> A friend asked me the following…
>
> “What was the Ground to Air TX from the 60’s that looked like a miniature T-368 or BC-610…. 2/3 size??     Grey, few hundred watts of AM..”
>
> Any ideas?
>
> Mark K3MSB
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