[Elecraft] K3+P3+MFJ-1026 = 3 black boxes = 1 happy camper

[Stewart]

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
>
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