[GreenKeys] FS: Mil Teletype Receiver

[Brenda Gentry]

There was probably a competition in the 1950s for mobile RTTY rigs. 
Collins made the R-392 and T-195 setup with external modem and FSK 
converter, Federal Telephone and Radio made the GRC-14, of which the 
R-808 was the receiver. The modem was in the R-808, and the FSK exciter 
was built into the transmitter. The power supply for the GRC-14 is very 
heavy. Both receivers used 24 volts on the plates of the tubes, the 
R-392 is all tube, the R-808 has some transistors in the audio section. 
Two very different approaches to mobile RTTY. The GRC-14 was used mainly 
by the Marines, the R-392 and T-195 were used mainly by the Army.

   B. Gentry, KA2IVY

On 8/4/25 10:02 PM, Duncan Brown wrote:
>
> R-808: HF RX with FSK converter in the same box. Mostly tubes, but 
> some solid state circuitry.
>
> I played with one once - all I remember was severe QRN interference 
> from the TTY switching. But that was probably a problem with that one 
> unit.  I can't see the military accepting something that bad.
>
> $200 seems high if you don't know  if it works and something obviously 
> loose in the tuning dial.
>
> YMMV
>
> have fun,
>
> Duncan
> K2OEQ
>
>
> On 8/4/2025 9:44 PM, MIKE MCAULEY wrote:
>> Just saw this at my local electronics surplus store in Tucson, AZ 
>> today. Don't know if anyone would be interested but thought I'd pass 
>> it along.
>>
>>
>>
>>
>>
>>
>>
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