This was with pre-amp I'm afraid - I didn't think about that - on same freq now (I recorded this about 16:00 UTC), without pre-amp its about S5 peaking S6.
Yes pretty much the same on all bands except 6m On 25/02/2008 13:14, "Jim Cox" <[EMAIL PROTECTED]> sent: > Your noise certainly doesnt sound like the normal power line noise that a NB > will remove. NBs are good in some cases but almost useless in others. > Actually the noise sounds pretty low to me just listening. Is this noise as > your call it, constant on all bands and all antennas which would be very > rare for power line noise. > With a properly calibrated s meter and no preamp what is the smeter reading > you are seeing? Jim K4JAF > > > ----- Original Message ----- > From: "David Ferrington, M0XDF" <[EMAIL PROTECTED]> > To: "Crafters" <Elecraft@mailman.qth.net> > Sent: Monday, February 25, 2008 2:47 AM > Subject: [Elecraft] [K3] Noise Reduction Recording > > >> I'm still having trouble determining if what I hear is noise that NB >> should >> get rid of. This is because I'm a relatively new Ham without the >> experience >> to know what I'm hearing. >> >> So I have made a recording on the noise and it is available from >> <http://homepage.mac.com/davidferrington/FileSharing2.html> >> >> I have recorded 3.740MHz in 5 second tracks with a tone between each >> change >> of NR setting, viz: >> 5 seconds of no NR, 200mS tone @ 700Hz >> 5 seconds of NR F1-1, 100mS tone at 1400Hz >> 5 seconds of NR F1-2, 100mS tone at 1400Hz >> 5 seconds of NR F1-3, 100mS tone at 1400Hz >> 5 seconds of NR F1-4, 200mS tone at 700Hz >> 5 seconds of NR F2-1, 100mS tone at 1400Hz >> etc. >> >> I have found no NB setting that affects this, I can possibly hear a very >> slight change, but it does not cancel the noise. >> I can do the same for the NB settings if people wish. >> >> I would appreciate some feedback on this please, is this just broadband >> hash >> in my urban neighbourhood from er, broadband and wall warts etc? >> >> Mail me off list if you'd like me to mail you a copy of the file direct. >> >> 73 de M0XDF / K3 #174 >> >> -- >> Why should I fear death? If I am, death is not. If death is, I am not. Why >> should I fear that which cannot exist when I do? >> -Epicurus, philosopher (c. 341-270 BCE) >> >> >> _______________________________________________ >> Elecraft mailing list >> Post to: Elecraft@mailman.qth.net >> 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 > -- Now, here, you see, it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast as that! -Lewis Carroll, mathematician and writer (1832-1898) _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
