The signal on 3501.6 seems to have some significant power behind it. At
noon (1700 UTC) it is running S7 to S1 (QSB) on my vertical.
There is also an unmodulated carrier on 10.5048 MHz, but not very strong
(at noon). 3501.6 x 3 = 10.5048
Jerry, K4SAV
On 11/2/2013 9:52 AM, K4SAV wrote:
I think I can do a little better on estimating the direction (better
than SE which I gave earlier). I can get two 30 dB nulls out of my
receiving antenna by switching directions. Those nulls appear at 145
and 133 degrees. Pointed SW the signal is S9 this morning. In the
null at 133 degrees the signal is S0 and not audiable. The signal is
considerably stronger at the 145 degree null. So my best guess is 133
degrees from Decatur, Alabama (north central Alabama).
Oh! As I was typing this, at 1353 UTC the signal on 3501.6 abruptly
stopped. It was still at S9 just before it stopped. Then at 1355 UTC
it came back but with RTTY for about 15 or 20 seconds, and then back
into its continuous unmodulated carrier mode at S9. The RTTY burst
was too fast for me to boot an RTTY decoder to see if I could copy
anything. I suspect this is not an unintentional radiator.
There is very little QSB on this signal. I was waiting to see if the
signal amplitude was going to go down after sunrise. At 2 hours after
sunrise it's starting to show signs of QSB. It went down to S4 but
now its back up to S8. Now at 3 hours after sunrise it's S7 with QSB
on my vertical, but only about S1 on my low dipole.
A line of 133 degrees from my location goes thru Jacksonville, Fl and
also thru that long chain of islands, Nassau Bahamas, Turks and
Caicos, and Haiti and Dominican Republic. Most of Cuba would hit my
145 degree null, but Guantanamo is close enough to be a candidate
(with a little measurement error).
A measurement from Florida would be interesting.
Jerry, K4SAV
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Topband Reflector
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Topband Reflector
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