Topband: Steady Carrier on 80 CW

[K4SAV]

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