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John
Sorry for the interference. I keep forgetting
that Mitch isn't exactly on 780. There is a small amount of 'wiggle room'
on the DF6NM 'high sensitivity' grabber if you would like me to QSY.
Jay W1VD WD2XNS
WE2XGR/2
----- Original Message -----
Sent: Sunday, September 04, 2011 10:00
AM
Subject: Re: LF: Weak signal on
137780.3
Jay,
I wondered who the mystery signal was, less than 0.1 Hz below VE3OT, who
was around 780.4. Could just make out the MP ID's.
John, W1TAG
FN43sv
Sent from my iPhone
Markus
The mystery signal was from WD2XNS ... you have
the time and frequency perfectly correct and the color DF also provides
corroborating evidence. Note that there was no break in the
transmission. The frequency is controlled by a GPS disciplined
oscillator (accuracy about 13 ppt). Transmitter power was 200 watts ...
radiated power is not known. During winter, with frozen ground,
additional radials, lower R and less foliage, the radiated power
would have been about 0.5 watt. Expect last night's test would be at
least 3 - 6 dB (maybe more) below that level.
Jay W1VD WD2XNS
WE2XGR/2
----- Original Message -----
Sent: Sunday, September 04, 2011 4:45
AM
Subject: Re: LF: Weak signal on
137780.3
The mystery signal was received between about
0:15 and 3:30 on 137780.310, with a 3.8 mHz downward shift from
about 1:30 to 2:15 - somewhat reminiscent of a DFCW "GM". Greenish
colour indicates southwesterly origin. The attached screenshot was
taken at 8 UT, timescale is 10 minutes per FFT.
I checked the other available TA grabbers
around 4 UT, but no trace of the mystery signal.
73, and have a nice sunday,
Markus (DF6NM)
Sent: Sunday, September 04, 2011 5:39 AM
Subject: LF: Weak signal on 137780.3
LF,
there seems to be a signal on 137780.300 Hz,
about 60 nV/m here.
Wondering whose it may be...
Best wishes,
Markus
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