anyone I don't know what program you used, but I ran a bunch of simulations on NEC3-GS. The results are fairly discouraging. With 10 WL long radials, you need thousands to be effective. And even then
In explanation of my bare white PVC antenna parts: I wanted to try out the antenna first before going to the trouble of painting or taping the PVC. If you want to put up an antenna for years without
shows anyone We're confusing two different issues. One is the ground radials as counterpoise, the other is ground radials to enhance low angle radiation. A half wave vertical requires virtually no ra
Two of my neighbors within a mile were selling the stuff. They were so glad to get rid of it, I paid something like 15 cents a foot, less than the scrap metal value. One guy threw in a 30 foot traile
I noticed in Chapter 8 of W2PV's Yagi book, he shows that for a 20 meter Yagi on a 54 foot boom, there is little difference in gain whether you use 4, 5, or 6 elements. What I don't understand is why
Tom brings up some valid points. I have been using a 90 foot vertical with a top hat for several years. It has latching vacuum relays at the 30 and 60 foot levels, so that I can make it look like a 3
I learned about this knot several years ago (I think it was here on TT). I was never much good with knots before, but this knot is extremely easy to tie; you virtually can't goof it up. It is now the
Also, does anyone have I have done extensive A/B comparisons between inverted vees at various heights and verticals on 40 meters. For DX signals, such as foreign broadcasters, inverted vee height has
You see a lot of books talking about characterizing the antennas and then designing a network for them. I have found that is is much easier to just use an adjustable phasing network and tune it unti
Receive only arrays can be fed differently. Last spring I put up an array of 1/8 wave spaced (32 ft) verticals for 80 meters aimed at Europe. The verticals were 30 feet high and fed through 1:1 isol
correction to my previous posting: should say "back" vertical Should have been 960 kHz. _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "
I believe the web page is out of date. They told me they changed to a tapered boom. My 4 element SteppIR arrives today if UPS is on time. Rick N6RK _______________________________________________ See
On my city lot in Silicon Valley, I compared an 80 meter dipole at 55 feet to a quarter wave vertical with 2 elevated radials. On DX, I couldn't tell the difference. For working up and down the west
I did this with a Tristao MA-40 with a TH-3jr on top. It worked perfectly. I mounted the house bracket for the tower on the side of the house next to a second story window so I could unbolt it easil
I just put up an Alfa Spid to turn my 4 element SteppIR (32 ft boom, 85 lbs). It's wonderful. It does everything they say it does on the web site. My favorite features: 1. No kerchunking noise from
It depends on how close it is to ground. You have to estimate the characteristic impedance of the strap as if it were a microstrip-type transmission line, ignoring any dielectric material. Then the
Having just put up a Steppir and run it thru CQWW and SS, I would never go back to a conventional antenna. One feature alone makes it worthwhile. I can reverse direction 180 degrees in a few seconds
For a 40/30 beam, you could make the elements 1/2 wave on 30 and use switched in loading coils for 40. The switches could select taps for phone or CW on 40. Rick N6RK ________________________________
There is a plastic "bullet" at the end of the tape that keeps it from hanging up. Rick N6RK _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers"
No. A properly designed lumped inductance is better than linear loading. That's why many 80 meter Yagi owners have upgraded to W6ANR's aftermarket loading inductors, replacing the original linear lo