Excellent answer from Don, W3FPR.
I fit the mostly SSB type with sub-Rx, so I use diversity
reception. I chose for the main Rx:
13-KHz (for AM and FM)
2.8-KHz
400-Hz
The sub-Rx has just the 2.8-KHz filter
I chose the 8-pole for ease in set up for diversity Rx and for the
steeper skirts (which I may not really needed up here in AK, but I
figured made the resale value better).
The DSP bw control works fine and I often narrow the high split on
weak or noisy SSB to improve reception. I keep the low split at
200-Hz. The 400-Hz filter makes CW reception of a single station
possible. 400-Hz filter is really amazing.
I have not used it on CW eme but expect it will provide some
advantages in narrowing the noise bw. Typically, I run 100-Hz for
eme CW once I have the signal tuned. Scanning for eme signals I use
the wider SSB bw and waterfall displays to detect the signal.
Most of my eme on 2m is using digital mode so no filter is used as I
export the IF of the K3 to LP-Pan and therefore to a
soundcard. Digital eme is watched not heard. I actually have the K3
select an empty filter slot when running DATA-A which eliminates a
center frequency gain "suck out" (black zone on zero freq display).
73, Ed - KL7UW
http://www.kl7uw.com
[email protected]
"Kits made by KL7UW"
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