[R-390] R390 Filament Wiring

[Paul H. Anderson]

On Sun, 6 Apr 2003, David Ross wrote:

> Bob & the gang -
>
>   Bob's statements about the R-392 being a follow-on to the R-390 bring
> to mind some thoughts about the R-391 & the GRC-19 set.
>
> What's the sense of having an automatically tuned transmitter paired
> with a manually tuned receiver?

I agree here!

>   I'd bet that the GRC-19 radio set was originally intended to have a
> 'hardened' R-391 as it's receiver.

Don't forget the AN/FRR-33, which combined the R-391 with the tunable
CU-286, and C-973, C-974 and C-975 controllers and PP-629 power supply for
handling dual diversity RTTY reception.  See
<http://www.r-390a.net/faq-systems.htm> for a little more info.

Paul