[Elecraft] K3 RF Gain difference, main and sub

[Mike Scott]

I am wondering if the RF gain encoders are read exactly the same between
main and sub receivers.

There is a significant difference in RF gain when I move them both down
together. I can turn the sub Rx RF all the way down and still have
appreciable RF gain, about equivalent to Main at half gain, 12 O'clock.

 

I monitored both receiver outputs on Spectragram with a noise source going
to both receivers, sharing ANT 1. I believe both receivers had identical
filters and settings. Very different gain response and no ability to reduce
sub Rx gain to zero or very low.

 

Audio gain tracks very well by ear. I can grab both AF gain controls and
move them together and audio remains balanced. It is quite easy to rotate
them together and have them not move differentially. 

 

 

Mike Scott

AE6WA Tarzana, CA

K3/100 SN508