[Milsurplus] RS-6...and AN/GRC-109

[kgordon2006 at frontier.com]

On 22 Nov 2015 at 7:12, David Stinson wrote:

> Scroll down and you will see a schematic of 
> the transmitter.  Odd-  Why is the "REC ANTENNA"
> terminal connected to the keying buss via a .01 cap??

As Robert pointed out that is one of the main components for the
RS-6/AN/GRC109's full QSK system.

However, if/when the transmitter and receiver are operating on the same
frequency, there is up to 30 dB of "suck-out" from the transmitter's
output tuned circuits.

This is why the manual states that if the receiver and transmitter are on
the same frequency, the best solution is to use two separate antennas, one
for the transmitter and one for the receiver.

I experienced this with my own AN/GRC-109.

Ken W7EKB