[Milsurplus] R648/ARR41 serial number 573

[Jack Antonio]

On 8/27/2018 10:31 AM, Mike Morrow wrote:
>
> Don't forget the essential CU-351/AR auto-tuner which is always an integral part of AN/ARC-38/-38A installations.  It's essentially a Collins 180L-3A with Amphenol connector instead of Cannon.
>
All of my antennas are close to 50 ohms at the frequencies of interest, 
so am now using the RT-311 without the tuner. Worst case
is 3570 ( I do use the ARC-38 on CW) which is around 2.5:1 SWR,  but it 
doesn't seem to bother the radio at all.

Hooking up the CU-351/AR is a "rountuit" project.  Probably at the same 
time when I have the system on the bench finishing up the
interphone and R-648 installation.

I have one CU-351/AR which states "MODIFIED" on the nomenclature tag, as 
well as a decal stating
that it is modified for teletype. But I have never seen any 
documentation on what that modification entails.

Jack Antonio
WA7DIA