[Elecraft] KX2 Receive problem!?

[Chuck Guenther]

Wayne,

Thanks for posting this!  Since the KX2 is my first SDR, it never 
occurred to me to try the preamp on 80 meters.  In fact I was very happy 
running with the preamp off, attenuator off, and RF gain set between 
about -3dB and -6dB.  This morning I was listening to FK8DD, and found I 
could copy him much better with preamp on, and RF gain at -10 dB, 
attenuator still off..

BTW, I really like the AGC on the KX2, and often find myself trying to 
adjust my K3 so it sounds as good as the KX2.

73,

Chuck Guenther  NI0C



Quote from N6KR:

"First thing to check is to make sure the preamp is on, and the attenuator turned off. Both are selected using the PRE switch. The KX2 is an SDR, and typically such rigs have about -120 dBm MDS with preamp off, and -135 dBm with preamp on. This can make a huge difference on a quiet band.

The dynamic range is good enough that you can probably leave the preamp on all or most of the time.

Let me know if your received signals are still down after turning on the preamp. If that doesn't fix it, you could have APF turned on (very narrow audio peaking filter), or NR turned on (noise reduction), or you could have a problem with a bandpass filter, etc.

73,
Wayne
N6KR"