Don, Try this:
1. Set mode to CW, BW to 2.00, RX EQ = flat. 2. With no signal tuned in, hold NR and set to F4-4. Tap NR twice to turn off NR. 3. Tune in an S9 signal, or better yet, use a signal generator (I use an XG2). 4. Set RF gain to max, AF gain for a comfortable volume. 5. Tap NR to turn on noise reduction. (You might want to keep one hand on the AF gain control :-) On my K3 (with FW 3.11), turning on NR under these conditions boosts the audio output voltage by 17.2 dB according to the built-in AFV meter. Using less aggressive NR parameters results in less of a boost, down to 6.3 dB at F1-1. Now tune in a weak signal (say, S3) and repeat the steps. The boost is still there, but very much reduced (On my rig at S3 and NR=F4-4, the boost is 6.3 dB, at NR=F1-1 it's 1.4 dB) Now imagine trying to copy a signal that rapidly fades between S3 and S9 with NR on. 73 -- Joe KB8AP On Apr 25, 2009, at 4:35 AM, Don Wilhelm wrote: > Terry, > > I do not experience anything like that on my K3. What NR parameters > are > you using? > [...] > 73, > Don W3FPR > > > G4POP wrote: >> I see that the dramatic increase in audio level when NR is turned >> on has been >> mentioned a couple of times but I can find no solution for this >> mentioned in >> the forum and the latest firmware 3.11 has not cured it. >> [...] >> Terry G4POP >> >> ______________________________________________________________ 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
