To: <towertalk@contesting.com> Hi Dave, The mast does reduce the field gradient below and around the mast without the need for an "ionized cloud". There are two ways to reduce field gradient. One is
Excellent example! Now for a test, replace that round smooth ball with a same size sharp wire brush! 73, Tom W8JI w8ji.tom@MCIONE.com -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submi
To: <towertalk@contesting.com> Hi Chuck, Any noise that is not directly coupled to the antenna is "propagated noise". Unless your doorbell is mounted on your tower or installed on your antenna, the n
To: <towertalk@contesting.com> One explaination is the lack of a good ground, another are coaxial stubs used to multiband the antenna. There isn't much worse than a coaxial stub used as a trap. 73, T
To: <towertalk@contesting.com> Hi Dave , Reference paper? If you stand there you can hear the corona...if you look at night you can see it...if you turn on a receiver it covers ELF to light. An arc i
I bought an estate to get a bunch of new 45G tower, and also wound up with a partially assembled pro-96 that I'll never use. (My QTH is between Macon and Atlanta). $750 73, Tom W8JI w8ji.tom@MCIONE.c
To: <towertalk@contesting.com> This is getting off the subject of antennas, sorta. The force reduction is by square of the distance for a charge distant enough to look like every thing comes from a *
To: <towertalk@contesting.com> OK, I'll take the bait. I've seen that dc blocking stuff mentioned. Is it supposed to have something to do with lightning protection? 73, Tom W8JI w8ji.tom@MCIONE.com -
To: <towertalk@contesting.com> I got "roped into" measuring the resonant frequency of tree by some guy who thinks they make great antennas because they are shaped like (gag) fractals.. In order for a
To: <towertalk@contesting.com> Do they pay for equipment damage if the protection fails? By far most of the energy travels on the outside of the cables, and the bulk of energy INSIDE the cable is com
To: <towertalk@contesting.com> Four squares traditionally use less than optimum gain phasing systems. The excellent phasing system described by Roy Lewallen (no splitter) uses 90 degree / 180 degree
To: <towertalk@contesting.com> Hi Bob, Thanks. I'm trying to make sense of this stuff, but customary reliable sources have little data. I hope this is taken in the spirt that I write it, because I wo
To: <towertalk@contesting.com> Hi Don and all, I haven't read that area of the Handbook, but I hope it doesn't say exactly what was written. I try to avoid special jargon to describe simple effects,
To: <towertalk@contesting.com> Hi Bob, I appreciate your answer, but I never accept one source (especially without an explanation of how the information was gleaned) for critical data. Can you recall
To: <towertalk@contesting.com> Hi Ed, I'm sure N4KG Tom just misstated something he knows. He's in good company. The ARRL Antenna book had a similar miscommunication. They claimed decreased dipole ra
To: <towertalk@contesting.com> Hi Morel, No, they won't help even a tiny bit. The filters in you receiver already only pass a small slice of that noise, whatever is within the IF filter bandwidth. In
To: <towertalk@contesting.com> No, I didn't write this. The other Tom did........... What I said was feedpoint resistance and current in the system often tells us absolutely nothing about efficiency.
To: <towertalk@contesting.com> Hi Don, I re-read my post just to be sure. I was very clear in expressing frustration with common but very incorrect rumors that so-called "magnetic antennas" do anythi
To: <towertalk@contesting.com> Hi Ron, The loop simply splits the current into two areas of half the level, the sum of which is nearly identical to driven element current in a yagi of the same patter
To: <towertalk@contesting.com> Hi Ron, The loop simply splits the current into two areas of half the level, the sum of which is nearly identical to driven element current in a yagi of the same patter