There is more to the end-fed wire: I'm personally talking about a 133' wire, that goes up 60-70 feet, and then out for the rest. On 160 you feed it direct. As many radials as you can get away with. (
Definitely one of those things you model to see what it does. Guarantee that there will be at least one non-intuitive outcome of what you proprose. 73, Guy == 73 & GL -- Guy Olinger, K2AV k2av@contes
In marginal conditions, such as daytime on the lower bands, or at the edges of a skip zone, etc, where the signal is at or in the noise, adding 2 db to your signal is helpful. For certain digital mod
The definition of db is 10 log (powerA/powerB) and has NOTHING TO DO with human perception. (Where DID that old wive's tale come from...) The landmark Bell Laboratories study on how well average peop
Maybe another way to put that: in a 48 hour contest, you can bet some significant number of contacts will individually qualify as marginal conditions (as in QRP & indoor antennas), and the 2 db will
Removing the inner traps removes the 10 meter functionality as a driven element. After that the element inside the remaining traps would have to be extended until 15 meters was resonant again. What t
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
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
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
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
For a LONG run to a tower (like my almost 300') I will bury a length of UG 10/2 w/g (in the same trench) out to the tower. I will terminate it out there in a box with a ground fault socket/breaker, b
Perhaps you've never received a nasty email accusing you of getting paid by a manufacturer for your recommendations. Disclaimers don't bother me. Disclaim away. Everyone has a delete key, and they ha
I'm not at all sure that Cos Theta is a proper formula for the diminishment of drag as the shapes are turned away from full head on. It does describe the diminishment of viewed area from a point dist
I hope readers understand in my prior post that I'm not real happy with 16 amps or 800 volts (rms) on an N connector. In my mind I'm considering how legal 60 Hz connectors look for those kinds of num
The interaction mentioned affects ANY 15 meter beam, be it monobander, tribander, 5-bander, Force 12, Cushcraft, whatever brand.. The problem relates to whether or not the 40 meter beam has secondary
The biggest risk to that repaired tower in my mind is not the neighbor's kid, but the increased chance of collapse in a windstorm (and loosing use of antenna and possibly part of house until all is f