[R-390] That's more like it!!!

Sun, 25 Jan 2004 20:27:20 -0500

All the audio and control functions (including the sidetone feed, keying in
CW, etc)  between the T-368 and the R-390's (2)  in the original AN/GRC-26D
system is done through the C-1123/GRC-26D interface box. between the T-368
and the R-390's. These control boxes are usually available from Fair radio.

My T-368E and pair of R-390A's are all interconnected through a C-1123 as
shown in the schematics in the GRC-26D manual. Without digging out the
manual now, I remember making up a cable between the T-368 control/audio
connector and the control box, and connected  the 600 ohm lines  from the
receivers to the corresponding connectors on the C-1123 and the sidetone
will there at the audio output taken from the control box. The sidetone
level is set by the pot in the T-368.

73, Meir WF2U
Gowensville, SC.

 -----Original Message-----
From: 	[email protected] [mailto:[email protected]]  On
Behalf Of K3PID
Sent:	Sunday, January 25, 2004 7:43 PM
To:	[email protected]
Subject:	[R-390] That's more like it!!!

 << File: [R-390] That's more like it!!!.txt >> Well I guess I am getting
through...:>). Anyway the two questions were as
follows:

First. ( I now realize that this may not have come across as a question. I
was looking for confirmation of my assumptions)

SIDETONE QUESTION 1/3/2004

The sidetone output of the T-368 is taken through a cap from the wiper of
the 500 Ohm cathode resistor of the cathode follower. Is it normally
connected across the "output" side of the 600 Ohm audio output of the R-390?
If so then the level of the sidetone is controlled by the cathode resistor
independ from the R-390?

_______________________________________________
R-390 mailing list
[email protected]
http://mailman.qth.net/mailman/listinfo/r-390