[R-390] (no subject)

[wa4aos at aol.com]

 Hi Group,

In my ever growing collection of R 390, R 390A and R 392 equipment, I have just received an R 1981 ( R 390A) There is not much on the web about this one and I am wondering if there are other examples out there?
My good friend Jon, K1VVC, found it at the Richmond Frost Fest this year; we have agreed on a trade and I now have the unit. I have not pulled modules yet but the Power Supply is an Amelco. Just a
 quick look over and my initial guess.is the rest of the modules are Amelco as well; not an EAC as I had heard but a very nice example nevertheless.

 
I pulled this off the web:

The R-1981 was a R-390A modified to bring out the 17 MHz, HFO and VFO signals to the rear panel andto insert an error correction signal for high-stability operation.  It was a part of the TSC-25communications system.  The modifications were done using a kit of parts from The Technical MaterialCorporation (TMC) under contract number 14385-PC-58. The manufacturer of the R-1981 receiver isunknown.  If anyone posesses one or knows of its history, send mail to the FAQ-Meister so we can share the information.        

When I get it in the lab, I'll take pics and post them on my web page. I am fortunate that this example is in very good shape, possibly an 8 on the 10 point scale. 
Any other info would be greatly appreciated.

Perhaps, we will have some DX openings this week from the recent solar storm; HOPE SO!

73,

Glenn Scott WA4AOS
DSM Labs
w w w dot dsmlabs dot com