I've used both the KAF2 and KDSP2 with my K2 and can offer these comments: For the noise reduction feature of DSP to work well requires a wide bandwidth. That is why any DSP unit is less effective in the NR department on CW than it is on SSB.
Personally, I like very narrow BWs when working CW because it enables me to hear the weak signals better. The KDSP2 does a very good job in giving me a very narrow BW with reasonably steep skirts, however that narrow BW makes its NR feature totally ineffective. In contrast, when using the wide BWs necessary for SSB work, the KDSP2's NR feature works incredibly well. Comparing the KDSP2 with the KAF2 on CW, I prefer the KDSP2 because I can set its BW very narrow and therefore dig the weak ones out of the mud better than I can with the KAF2. Now, if only my K2/100 had a mu-metal shield around it so that I could use it with my linear amplifier without degrading its transmit signal (the hypersil HV xfmr in the amp puts out a BIG electromagnetic field at 60 Hz which puts hum into the PLL oscillator circuit in the K2 unless they are separated by an unreasonably large distance). 73, de Earl, K6SE K2 #2622 _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
