Idea: Change in propagation causes different band noise levels. Same with geomagnetic activity, number of neighbors in the building, you name it.
matt W6NIA K3 #24 P3 #14 On Sat, 11 Sep 2010 18:34:26 -0400, you wrote: >Just assembled P3 a few days ago. Having a problem that I can't seem to solve. > >Background: Haven't done K3 OUT mod yet (SN 113 ---- fairly old) ... really >am apprehensive about opening up K3 again ... but I know I'm just being >neurotic ... will face any weekend now). > >The P3 was pretty much performing as expected ... given that I haven't done >the above mode yet, and I live in manhattan with a mediocre hamstick hung >outside my window .. I could generally see strongest stations above a lot of >noise on P3. That was good. > >But over past few days, it seems that the sensitivity of the device was >diminishing .. started to have trouble seeing the few stations that I could >actually hear above the noise on my K3 ... and then today, it now appears that >the P3 is basically deaf to the K3 ... I see some low ampitude noise, which >doesn't vary in appearance with or without the coax cable to the IF OUT of the >K3 plugged in. I am listening to a fairly strong Italian CW station now on 20 >meters now, sticking his head above the omnipresent S5-6 noise ... armchair >copy, if you will, but all I see is noise at the bottom of the P3 screen. The >center frequency tracks my K3 nicely ... but no matter how I adjust the REF, >SCALE and SPAN, all I see is noise. > >Any thoughts would be welcome. Yes, I will dive in and do the IF OUT mod, but >am trying to understand the curious behavior, and to see if it sounds familiar >to anyone. > >Thanks in advance > >-- WB2SSB > >Joseph J. Sanger, M.D. >Associate Professor of Radiology >Director, Radiology Informatics > >------------------------------------------------------------ >This email message, including any attachments, is for the sole use of the >intended recipient(s) and may contain information that is proprietary, >confidential, and exempt from disclosure under applicable law. Any >unauthorized review, use, disclosure, or distribution is prohibited. If you >have received this email in error please notify the sender by return email and >delete the original message. Please note, the recipient should check this >email and any attachments for the presence of viruses. The organization >accepts no liability for any damage caused by any virus transmitted by this >email. >================================= > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
