I just pulled the info from the web for that calculation which didn't mention mast weight. I went back to the Yaesu manual, and yes that is what it says, it includes the mast weight in the calculatio
There is a ton of information in the archives of this reflector. http://lists.contesting.com/archives//html/Towertalk/ Just pick a subject and do a search. If the search engine is uncooperative, try
I recently got some real dimensions and rebuilt my model for this antenna. This antenna is supposed to cover 40 meters thru 10 meters by selecting taps on the coils. Radiation resistance of the anten
While I was waiting for my tower to be finished, my XM240 was sitting out in the back yard on concrete blocks for about a month. When I removed the end caps, a whole bunch of water flowed out. Draw y
You have two responses so far, one from either camp, and you can believe both of them. This antenna is very unpredictable, it works fine for some and lousy for others depending on the exact configura
A Zero Five should work OK on 40, 30, and 20, and better if you have a remote tuner located at the base of the antenna. With a remote tuner operation on 80 may also be acceptable. Feedline loss witho
I don't understand the reasoning for using double bazookas on 40 and 80. The only thing that a bazooka provides is wider bandwidth, and that increase is so miniscule that it doesn't seem to be worth
You have it correct. It's just a 43 ft aluminum pole. Run that thru EZNEC and you can see what happens to the radiated pattern on the high bands, and notice the impedance on different bands. Yes the
Here is an EZNEC simulation of the gain of a Zero Five using 32, 100 ft radials, average ground, and 100 ft of RG213, also including a 4 to 1 balun at the feedpoint as recommended by Zero Five and as
There are a few details missing that may affect the answer. Is the noise atmospheric noise or man made. "S9 hiss" doesn't sound like a description of atmospheric noise. Are you measuring signal-to-no
I guess you weren't paying attention. I just answered that question 5 days ago. http://lists.contesting.com/archives//html/Towertalk/2008-05/msg00115.html ____________________________________________
Daniel, the balun on the Zero Five is used to reduce the loss incurred by the coax feedline because of the very high SWR of the antenna. It does reduce it some but not nearly enough. A balun is not n
Mal, a balun can have more than one purpose, most commonly they are used as you said to transform balanced to unbalanced or visa versa. They are also used to transform impedances. These baluns can be
..."There's more than one way to skin a cat but I think this one gets used less frequently than is justified, given how darn cheap and easy it is."..... Maybe it's because of one of the disadvantages
The thread isn't the only thing that has gotten convoluted. I didn't write that, N3OX did. Jerry, K4SAV _______________________________________________ _______________________________________________
It was slot at 700 MHz where TV channels 51 thru 69 used to be. The auction netted $19.6 billion. CQ June 2008, page 68. _______________________________________________ ______________________________
That was an interesting story Dick. Thanks. K8RI suggested maybe induced currents from the strike, but it seems to me that you had more damage than what usually happens from that. Here is one more po
Makes sense that a large rotator will not fit in that tower. It's only rated for 10.3 sq ft at 70 mph. The antennas you listed will be much more than that. I have the same antennas (4 el SteppIR + XM
I'm curious why you would ask such a question. 1. Maybe you are trying to determine if NEC models predict real world experimental data. If so, you aren't going to get that from an "I built one and it
Jim, I wrote you a list of items and started to send it, then noticed that K3WA had already sent you almost exactly the same thing I wrote, so I erased it all. So I will just add, after you do the th