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Loggings / Spy Numbers / Re: UNID CW on 4330
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on: December 10, 2010, 2355 UTC
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The "=" sign is how the software decodes the morse BT ( _ . . . _ ) which is a break. In phone, one would say "Stand by". In CW, one sends BT.
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10
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General Category / General Discussion / Re: SWL's Needed For Enforcement Help
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on: October 16, 2010, 0352 UTC
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Not at all interested in reporting these sigs. But, interested in including them in daily scans for a chance to catch one or more.
Europe has their own radio cops. I, for one, am not interested in being a radio cop. Curses to the hams that think they are radio cops too.
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12
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General Category / General Discussion / Re: Setting up my first Beverage, looking for input
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on: September 10, 2010, 1451 UTC
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A bev antenna is used for LW and AM BCB bands because signals approach it at very low angles. If you use a bev for 7 megs, the signals will be coming in from a much higher angle, and you will actually have negative 'gain' compared to a dipole at the high angles.
However, this is a good time to point out that experimentation is what it's all about. So, if you want to find out for yourself, go for it!
The best antennas I have used for 7 MHz. area SWLing are-
Large inverted L (over lots of ground wires, fed with 9:1 balun) T2FD (horizontal, flat config.) 1/2 wave wire dipole (with 1:1 balun feed)
Verticals are OK, if you have LOTS of ground radials and are in a quiet location (I am). But, even the simplest dipoles outperform a vertical for SWLing, hands down.
Seriously, I know the 'expert hams' hate T2FD antennas, we hashed it out a little here not too long ago. However, for SWLing, they are really quiet, and really pull in the signals! Sometimes, I can hear things on the T2FD that I cannot hear on the other 5 antennas. I don't care how they transmit, just talking about SWL applications here.
73!
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15
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Loggings / HF Beacons / Re: Morse Beacon Keyer
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on: September 02, 2010, 0610 UTC
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Wouldn't that circuit in the above schematic actually be sending " O S "?
SO much easier, and fancy IDs possible, using a PIC for a keyer these days.
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