I don't think it's an issue that is worrisome with a large transmitting loop. The useful property of small loops is that they have a very clean pattern with very deep nulls. Any loop response to com
It's AC, so the rod thing is just to control the breakdown of the line-to-(lineman+helicopter) side of a capacitive voltage divider (the other side is helicopter-to-world capacitance) ... that thing
Could be something incidental to the repair, like a shield strand across the coax or water ingress? Was the feedline mechanically damaged? I wonder if a connector got pulled hard somewhere? I can sa
Where were you standing relative to the antenna when you tested it? Where does the coax run relative to the antenna? Anything that gets anywhere near the T-wires will have a major detuning effect. D
No kidding! I just looked it up on Matweb.com and the flexural yield strength is listed at 8100psi! The elastic modulus is about a thirtieth that of steel (1000ksi vs. 30,000ksi) , but the cross sec
Which is why any "weird" endeavor such as this should be approached from a sound, rational engineering perspective, informed, of course, by the voice of experience. I don't think that it's necessari
As an outside observer on this one: There haven't been any attacks on SteppIR antennas; there have been dissenting opinions that SteppIRs are perfect and attempts to convince the dissenters that the
Look, I like complexity. I use motorized switched matching networks on my antennas so I don't have to use a regular tuner... The issue that I would be considering with something like a SteppIR is mor
Because that will give people yet another thing to incorrectly blame a ham antenna for. When the market tanks, they'll just say "It's because of that eyesore" and demand their money. Someone on eHam
No, but a promise signed with money is not an acceptable solution for your word. Actual data on the subject is what Krish needed and there are several good posts in that vein, so I'm going to bow ou
Steve, thanks for chiming in... I hadn't thought about that, though it seems that Krish's HOA is considering allowing this installation even though they could likely outvote him and reject it out of
I've thought about this a bit for guy ropes for my 60 foot telescoping vertical... they always seem to get tangled if it's even a little windy when I take it down: I haven't tried it yet, but I was
This one would take some serious geometrical wrangling to get the whole thing right, but I think you could potentially use the spools I mentioned before at the top of the bottom section of your crank
For RF grounding, radials are always better than a ground rod, so just cut it off where it is and add a couple more radials than you would have otherwise, and you're good to go. Dan ________________
If you modeled this, did you include loads in the centers of the elements that go to other radios that model the effect of the feedlines terminated in the stubs and bandpass filters for the other rad
A little next-door to the topic at hand, but I'll use them in antennas if they're still good, I promise. I have a couple of Jensen 3kV vacuum variables that may have been shocked pretty hard by a fal
ground type Yes, it can. EZNEC+ allows more segments, and I think, circular polarization... but both EZNEC 4.0 and EZNEC+ 4.0 allow the Real, High Accuracy (also called, I think, Sommerfield-Norton)
Once your antennas are working as well as they can, how much of getting through the pileup or winning the contest is the confidence you get from feeling good about them ? ;-) Dan ___________________
On 40m, this antenna would need to be up at 40 feet and on 80m, 80 feet to get the same sort of interaction with the earth that that antenna had. That's not even considering the possibility of diffe
"This is a ridiculous claim. How can it be noticeably better than a 4el 10m yagi on a 16' boom or a 3 el 20m yagi (like a Hy-Gain 203BA) on a 16' boom?" Noticeably? I dunno. However, it could be bett