To: <towertalk@contesting.com> Hi Ernesto, I certainly don't know why it would not be a good idea Ernesto. I'd try it anyway. I've used them. They are frequency and dimension sensitive because the ou
To: <towertalk@contesting.com> <snip> Hi Jim, One thing to keep in mind is that with small radial systems, ESPECIALLY including elevated systems, you can have a bunch of common mode current on the fe
To: <towertalk@contesting.com> I used to do something similar. I have two boxes with 48 volt 2 amp transformers with SO-239's and F connectors on the 48 volt side. I step the line voltage down (and m
To: <towertalk@contesting.com> Another very good antenna book is by John Kuecken (Antennas and Transmission Lines). It went out of print years ago, but MFJ is re-printing the original version. More t
To: <towertalk@contesting.com> It is possible to design a single phasing system that functions correctly over octave bandwidths, but there are problems. Here's how you do it... You simply invert the
To: <towertalk@contesting.com> Hi Pete, I live on a 300 acre farm way out on a dirt road in the boonies of GA and have a gaggle of 500 ft Beverages a thousand feet or more back from the house. My fou
To: <towertalk@contesting.com> Hi JP, I've been keeping a running total of mornings my Beverages are better than my 160 4 sq. The Beverages are better about 1/3 the time during darkness, and nearly 1
To: <towertalk@contesting.com> Hi Tod, My answer to all three is bare tinned copper buss wire. It's easy to solder, cheap, and rugged. Size, at least according to real-world field strength measuremen
To: <towertalk@contesting.com> Hi JP Even if the guy line is "non-resonant", you can still get into a mess. Conductors do not have to be resonant to re-radiate. They only appear EM transparent when t
To: <towertalk@contesting.com> Hi Lee, No secret, they all work well if you don't stick them in a mess of other wires..I find they work well even when in droopy V fashion. (An Inverted V is really a
To: <towertalk@contesting.com> That's true. If there is *no* current there is no radiation. But keep in mind *small* radiation effects can, under the right conditions, add up to a large combined effe
To: <towertalk@contesting.com> Hi John, There seems to be some assumption on this reflector that all "utility grade hardware is bad". The grips I buy are HG-207-1/4. The rating is 6650 lbs, the same
To: <towertalk@contesting.com> Hi Ward, That's the idea. I had two at WXEZ FM on 160 meters, with a 350 ft high apex. These antennas are not the same as the "toys" sold by B&W and others. Long wire a
Hi Roger, Your tounge-in-cheek post is important, because it points out there really is no such thing as an "in the ground antenna image". The mental or paper picture an "image antenna" paints is a v
To: <towertalk@contesting.com> Hey now, I've yet to see a rig that is 6 dB an S unit: Look at the R4C, the scale is 5 dB. Same for the Collins gear. The scale is drawn and clearly marked at 5 dB per
To: <towertalk@contesting.com> Like Tom, I seriously doubt it makes a bit of difference. I'm certainly open to any explainations why a dc ground has anything to do with RF noise, unless the antenna i
Hi Jim, I wouldn't give up on yagi's for that reason, especially if there isn't something making noise right below the antenna. Perhaps your yagi had a defect in element balance, allowing the tower a
To: <towertalk@contesting.com> Hi Jim, I'm as puzzled as others (like Cedric?) about all this stuff, and have been for years and years. There are a few things that are very well established... 1.) A
To: <towertalk@contesting.com> Hi All, The single largest problem with T network tuner power handling and efficiency on 160 and 80 is most tuners have FAR too much Q. In other words they lack enough
To: <towertalk@contesting.com> Grounding doesn't seem a logical choice at all Dick. Grounding the antennas provides no improvement in lightning protection when using that particular switch box. The r