Tried a 1026 here against PLT interference. Made little difference, probably because the interference was not a point source, but was radiated from various mains wires from both in and outside the domestic property.
Stewart G3RXQ On Sat, 18 Sep 2010 08:10:56 +0100, David Cutter wrote: > That's a very interesting account. I wonder if anyone who suffers PLT/BPL > et al noise has similar experience. > > David > G3UNA > > >> My P3 came a couple of weeks ago and went together just fine. The >> bands have been bad at my QTH for a long time yet every time I go >> camping they are good. The first thing the P3 showed me was a higher >> then expected noise level on all the bands. I had a noise level of -90 >> to maybe -100 at best. I took the K3 and P3 out to the camp ground about >> 70 miles from home and the noise on the bands ran from -120 to -130 dbm. >> No wonder all these years my 44 ft camping doublet seemed better than my >> Hy-Gain Hy tower or my 105 ft doublet fed with window line at home. I >> also notice on 40 meters at the camp ground that the background noise >> along with the signals came up at night. That would explain why I >> sometimes heard signals at home but always with lots of noise. When I >> got home I found my old MFJ Noise Canceling Signal Enhancer (MFJ-=1026) >> in my shed and hooked it up. I had never been able to make it work using >> the S meters of my IC-746PRO or K3. The S-meters just did not have >> enough resolution and a receiver does not look at enough of the band. I >> set the P3 to a scale of 30 and band span to 100 khz. I started playing >> with the 1026. I was able to measure the levels of each antenna on the >> P3 than match them. The phase knob and switch were set for a null in >> the noise than the strongest antenna was adjusted for more of a dip >> until the phase and antenna were adjusted for the minimum noise. I can >> tune in a signal and adjust to 1026 for best signal to noise. Now I can >> hear and work stations on 40, 20 and 30 meters. If I turn off the 1026 >> the stations I hear go away except for the strongest and they even get >> noisy. A station with 40 db signal to noise on the P3 becomes 5 db >> signal to noise when I turn off the 1026. When I turn the 1026 back on >> the band again has many stations and I am able to work them just like I >> can from the camp ground. > >> Ken W0CZ > > ______________________________________________________________ > 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 ______________________________________________________________ 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
