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
