Martin, I experienced a similar problem two weeks ago in the WAE RTTY contest. My K3 is s/n 3035 with sub receiver and I was running 3.57 firmware at the time with N1MM contest software thru a microHAM micro Keyer II.
The only difference is my problem was in another band section on 80 meters: 3.586 to slightly above 3600...the upper 3/4 of the RTTY section. Your description of the problem is very good and I would only add that there seemed to be a complete loss of sensitivity of existing signals in that band section. I know because I checked on another receiver and that section of the band was full of RTTY signals I could not hear on the K3. What I did hear on the K3 was very similar to what you described. Since I was in the middle of a contest, I did not spend any time trouble shooting nor do I remember all the settings. This is the only time I have had the problem and I have not been able to duplicate it again. I agree, very weird. Joe K4HMB DM4iM wrote: > > Elecrafters, i had a strange noise on 80m ssb last night and the night > before. When tuning up the band, the noise set in at exactly 3.686.000 > like someone had flipped a switch. > It went away at -say- 3.692.xxx, i can't remember exactly. > When tuning in the opposite direction, it set in 1 or 2 khz below the > frequency where it stopped when tuning upwards, and went away when > tuning below 3.686.000, again like with the flip of a switch. I could > repeat that several times. > It sounded like a totally overloaded frontend. > Like the bandfilter was bypassed. Like the whole 80m-band was received > in that small portion of the band. I heard cw, ssb, harsh noise, all > over this small frequency range, even on a single frequency, no matter > where i tuned. > It imediatelly went away when i switched ON the sub-rx, and IT STAYED > AWAY when i switched the sub-rx OFF again. All back to normal, with > some stations ragchewing in that portion of the band. > This is the best i can describe it with my limited knowledge of the > english language. > I could not get the K3 to do it again. It seems like the K3 was stuck in > a weird condition. Firmware is latest, but it also happened with the > earlier firmware. > > Martin > > > -- > > 73, DM4iM > ______________________________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3-strange-rx-noise-tp4075448p4077451.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
