[R-390] R-390A 800 cps tone in cal below 8mh bfo off

[Roy Morgan]

On Sep 8, 2015, at 8:00 PM, Larry H <dinlarh at att.net> wrote:

> ...when I'm using the calibrate signal below 8 mh, I hear about an 800 cycle tone with the bfo OFF. It is weak, but it's not right.

I suspect something odd about the 17 mc crystal signal that is used below 8 mc.

I doubt it’s the BFO or the calibrator.

Get another receiver and listen to the 17 mc signal, also listen to the calibrator signal with the other receiver.  If you can, listen to the BFO signal with the other receiver.  I suspect you will soon find out where that 800 cycle signal is coming from.

Roy

 
Roy Morgan
k1lky68 at gmail.com
K1LKY Since 1958