No, it won't. Model it and you will see why. The twenty meter elements are coupled when operating the ten meter beam. You get very interesting 10 meter current distributions and related detunings on
That's right, in the C3x series the intermix is solved by the closed cell for the driver, and the presence of the 20 reflector is solved by having the 10 ref in front of the 20. In W7WHY's case, thou
Claudio, I just saw this post. On CQ-Contest you talked about a KT34XA versus a C3. Here you talk about a KT34 versus a C3 A KT34XA and a KT34 are not the same antenna. The KT34XA is an eXtended KT34
I wouldn't worry about putting something up on a chromalloy mast, as long as you use a platform down 8 or 11 feet from the top for the rotator, and let the thrust bearing and the rotator handle the s
I think there is a large audience for answers to this question. My own 80 M plans revolve around the emergence of something of this nature. Please keep the discussion on the reflector. Thanks. 73, Gu
Second Tom's post, but methinks though gentlemanly, Tom's use of "pathological" is too kind. Snake oil has been around for a long time, AND has those who swear by it. Snake oil salesmen just don't ca
I modeled that with the following assumption: that I would ground the 20 meter ref and dir (only) to the boom which is grounded to the mast and then to the tower . This places the voltage peak out at
In the modeling for high band beams I have done with induced current on guy wires, the following combination methods seem to get the most bang for the buck, varying by what one has to pay for stuff,
guy Actually, NOT ok. The typical image we form in our mind of a beams pattern is a FAR FIELD pattern, that is to say when we are far enough away from the beam that the sum of the radiations from th
Ken blends a number of things together in his post. Let's separate them out: Proportions are at issue. Most of the time I have seen a tribander and a two meter 10 element or some such up together, th
Try feeding that 160 meter inverted el at the end (hi-Z) against ground on eighty meters. Avoids a lot of the 1/4 wave conundrums and has a pattern much like a hemisphere. I used up 63 feet and out 7
To the original poster, one of the ground-independent multiband verticals like the R8, etc, would be quite good above a tin roof. The difficulties with ground for a vertical are 1) insufficient radia
RF current causing TVI in tin roofs is particularly possible when the roof is used AS the current sink or is tightly coupled with high current radials immediately above it. The amount of current/volt
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This is a hash of my high school physics teacher's illustration on pulley mechanics. Stuck with me ever since. Something about a picture worth a 1000 words. Lightweight Larry weighs 100 pounds. Norma
The reduction mechanism of a ganged pulley system is in the number of feet of rope the worker pulls in as a ratio to the distance the load travels. In a two to one system the worker pulls 200 feet of
See other post on how advantage achieved. A gin pole is just a device to give an attachment opportunity high enough above already accomplished structure to allow fixing various lifting devices to con
In that case the already accomplished structure is the base structure, which could be just a hole in the ground, or a ring bracket on the deck of a ship. List Sponsor: Are you thinking about install
To: <towertalk@contesting.com> If you put a tension guage on the tie off line, you would find that the tension is essentially equal to the load divided by whatever advantage exists in the tackle sys
To: <towertalk@contesting.com> As I said before, modeled 'em, measured 'em, done all that, been there. I stand by my post, Ken. You're not the only one with a meter. List Sponsor: Are you thinking a