It is true that in the absence of other factors, maximum gain is a function of boom length. However, in a multi-band antenna, secondary factors strongly affect how much gain can actually be realized
In terms of raw forward gain, true, but short-boom antennas can be designed to manage the bedeviling secondary factors in ways that make them better antennas than poorly implemented long-boom antenn
A slight clarification on the exact problem with the KT34XA... When we started presenting data, as Steve said, several other XA owners came up and said, "Mine acts JUST LIKE THAT and nobody has ever
less I just got out and whomp 'em to death with a plastic owl. You might also consult Hunter Thompson's essays for a number of innovative, yet amusing, solutions. 73, Ward N0AX _____________________
feet of antenna with ice and 110 mph wind...you can put 500 pounds at the top... It will do all of that. Just not at the same time. 73, Ward N0AX _______________________________________________ See:
This was extensively investigated in the 1930's through the 1950's. I believe the BBC and British Defense engineering staffs did a lot of the work since they of farflung empire "over which the F-lay
For a look at a simple gamma match technique - find a copy of A. Alvareztorres, AA1DO, "Two On Ten," QST, April 1999, pp. 67-69. Al (now an SK) uses a tubular matching capacitor that is much easier t
Marlon, The number one reason that the amateur service exists is stated in the FCC's Basis and Purpose of the Amateur Radio Service, rule 97.1(a) - "Recognition of amateur radio's exceptional capabil
I replied to an earlier message in one of many Towertalk digests I was slogging through after being gone for a few days. I suppose I should go through these things backwards. Sorry for the redundedun
use, they collapse down to 3 feet (each side) or whatever. This would reduce the 2 be a big advantage for restricted QTH's. Here's an even better idea for a low-profile antenna. Figure out how to dr
The antenna has achieved a mechanical soundness rating of 1.0 on the Leeson Scale - that's equivalent to the number of winters the antenna has survived the W6NL mountaintop and come out intact. That
Tradition has it that you put in one card from each of the continents (don't forget Antartica!) and it has to be a real card, not a made up one. It helps if you arrange them in the appropriate direc
Hi all, As you may have heard, John N7TT is the proud new owner of the W7RM QTH in southwestern WA. John has a bit of a project on his hands, to say the least, as he restores the "infrastructure". In
give the dirt away. Spoken like a True Ham! :-) 73, Ward N0AX _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations"
Anybody have a schematic for the R-7000 Matching Network? (aka - MN7000) I'm re-creating an R-7000 that is missing the matchbox. Already tried the usual Googling, but there are no links to active Web
Thanks for all the quick responses to my request for help. By far the most useful reference I received was... http://www.iol.ie/~bravo/r7_vertical.htm EI7BA's page was very helpful and had info on th
Another good example is the small receiving loops with a sharp null broadside to the plane of the loop. As far as gain goes, they are pitiful - at least 20 dB below even a mediocre vertical. But ste
I'll bet it only had one nut in the shell... Hmmm...would that make it "a salt weapon?" 73, Ward N0AX circuitry. _______________________________________________ See: http://www.mscomputer.com for "Se
One thing has been overlooked in the discussion of grounding with respect to lightning and ac safety. I don't disagree with anything W3LPL had to say, but I would like to point out that it is importa
The old-fashioned way was to use rules of thumb and excessive safety margins because the mechanics of the material were not sufficiently well understood to support less rigid designs. It's the same