I use a Datong FL3 audio filter and the difference to my ears is amazing. The K3 sounds a lot lesser hissy and is very "warm" sounding when compared to the unfiltered radio. Yes, I have tried all AGC and EQ settings.The difference can not be equaled by just adjusting the RX EQ or by using a pink noise roll off mask. My Datong FL3 is hooked up permanently to the K3 and I can easily switch it in and out. Anecdotal comments from other hams also confirms the filters efficacy. I have the DSP board upgrade in the K3.
I have perfect hearing, so its not my ears coloring the results. The K3's hiss does have a sharp bite to it that was fixed by using the Datong filter. I know what real hiss is, having owned a TS530S and a FT990 both of which had the worst imaginable IF hiss. When I tried these radio again I could not believe how quiet the K3 really is,,,, however you then use a SDR radio and your perspective of what quiet is changes! Maybe the K2 SCAF or some other SCAF will do the same job as the Datong. Datongs audio filter has a legendary reputation and its audio peak filter on CW and general filtering qualities leave many DSP radios for dead. Amazing for a 30 year old box! If you can find a Datong FL3 buy it! 73 Craig ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
