Here's an outline of my method. There's not much to it. First, my antenna is a doublet 30 meters (102 feet) long, like a G5RV. My tuners have been C-L-C "T" networks; these are high-pass filters. I s
By "Holy Grail" I mean a * no-tune, * all-HF-band, and * full-legal-power (incl. negligible-loss) antenna-feedline system. -W1HIS. Dennis, K7FL, wrote: See the response to Howard K2HK that I posted a
(1) Don't put a Radio Works "Line Isolator" in the output line from a legal-limit HF power amp. It's unsafe, as I shall explain below. Also: (2) The common-mode choking impedances of these products a
No question. Most of the time I transmit between 10 and 15 watts. Only when conditions require it (just twice in the last month -- I just reviewed my log.) do I QRO to 100 or 200 W. Only when conditi
You're right; I meant SF6. A close friend, also a ham, developed high-voltage (about 1 MV, IIRC), DC, gas-filled, underground power-transmission lines -- first in the HV lab at MIT, then at two big i
Ward Silver N0AX and others have reminded us that, whereas some antennas may _seem_ to be "low-noise" receiving antennas, often this is an illusion because the antenna has a great deal of _loss_. (Wh
If, as I suspect, the "EH" antenna of which you speak is the infamous crossed-field antenna, or "CFA", be warned that at best it's a big mistake, and at worst it's a hoax. The feedline to a CFA does
Years ago at another QTH I had a similar situation. I noticed that the city had poured tar along so many cracks in the street that (1) a few more tar-covered cracks would not be noticed; and (2) all
It worked like every other vertical: poorly in comparison with a horizontal antenna at the same height, except for local-area ground-wave propagation. I researched the topic of tree conductivity a fe
An 80-m dipole that close to ground is virtually omnidirectional, so don't worry about what direction it runs. Just install it as high as possible, with the centermost portion as high and straight as
The humidity of that air is probably not sufficiently low to prevent condensation within your feedline when the outside temperature is very low. You must reduce the "dew point" of that air safely bel
I have experimented with balloon-supported wire antennas for 40 meters, but I believe that my conclusions apply equally to a 160-m antenna: 1. Use _Litz_ wire rather than solid or stranded wire, to m
No; but, if I did, I would minimize the weight of the feedline by Zepp and/or Windom feeding. Zepp feed uses a two-parallel-wire feedline, one-quarter-wave long, with one wire connected to the end of
I agree. I agree again. That's an understatement. Don't trust a real estate agent _at_all_ about this. No matter how clearly and absolutely and unequivocably I state, orally *and* in writing, that I
At 8:30 AM -0500 4/5/03, a TowerTalker replied to me off-list: Please understand that my original comment and my forwarding of this one come not from a grudge against real-estate agents, but from a d
I'm sorry that I did not know what I should expect from Realtors, and that I relied on Realtors to tell me. I should have known not to listen to them. Thank you for confirming what I learned the hard
I was using three "buyer's" agents. In theory, they were working for me. However, because their compensation would be by commission, they were motivated to make a sale happen. A "buyer's" agent is al