What we have is a transmission line that carries the signal from one direction. If the spacing between the wires varies, then the impedance does. In that case, the F/B ratio can suffer. The Z ratio o
I just got some panel-mount F receptacles from Pasternack. I don't know if they make F double-females that good, but they had the best contacts of any F females I've ever seen. Good tension, a radius
Oh really? What about CCS against gold with silicone dielectric compound to seal out moisture, Tom? I haven't used those gold-plated connectors yet. Maybe I should return them for a refund? 73, Mike
I, for one, am happy that Tom et al take it seriously, because that's how we learn things to improve our stations. 73, Mike www.w0btu.com _______________________________________________ Topband refle
It seems to me that a 1/2 wave monopole would need longer radials than a 1/4 wave vertical to help accomplish that. The point of current max on radials under a 1/2 wave ground-mounted vertical would
I bought some of these from this seller and this eBay listing number, and they arrived today. Just thought I'd mention that there are no O-ring seals. I didn't try them yet; I have to figure out the
Dave, I have a lot of faith in NEC and N6LF's work, also. But I think the testing is required partly because we cannot successfully model Guy's folded counterpoise in NEC to determine the changes in
Can anyone tell me how to prepare this RG-6 (F-6) for snap-n-seal connectors? Do I fold the braid back over the jacket? If so, how far? And is the same true for RG-11 (F-11)? The temp is going to dro
Thanks to everyone who replied to my question! I think we're good to go. 73, Mike www.w0btu.com _______________________________________________ Stew Perry Topband Distance Challenge coming on Decembe
The very act of laying an insulated conductor on the earth lowers its velocity factor. I forget how much, but the reduction in VF for a BOG is significant. This has been discussed at length here; you
This is also the impression that I have. I've read countless experiences over the years that indicated that trees were no worry on HF. But then this thread came along. I have no other antenna to comp
I wrap a few turns of the CAT 5 Ethernet cable coming into the back of my shack PC around a few stacked 2.4" diameter #31 ferrite cores. Works for me. 73, Mike www.w0btu.com _________________ Topband
Jim's suggestion worked beautifully here! 14 turns of CAT5 cable on a single 2.4" #31 core works much better than the old choke with 5 or 6 turns through four stacked 2.4" #31 cores. It eliminated th
Yes! What in the heck was that? He sounded like a UFO from Mars or something. I heard him many times (never did copy his call) and never figured out what was causing that odd noise on his signal. Tha
Milt, This was posted March 1, 2012 by N4ZR. Hope it helps. :-) I have one, too. I never used it. 73, Mike www.w0btu.com ... I [apparently N4ZR] wrote it after a little reverse-engineering. *Programm
I'm glad you enjoyed it. I don't know exactly how to explain this, but I listened to the contest a few times and was kind of disappointed. I never felt compelled to participate and so I didn't. I did
Pete, You're correct on the turns ratio: the impedance ratio is the square of the turns ratio. I'm wondering whether you are considering that one turn on a binocular core is actually one pass through
How about folding the shields back a little? I think that's a superior way of doing it as opposed to cutting them all flush with the jacket. I asked a question here some months ago about whether or n
The Collins 312B-4 speaker console with wattmeter (the only wattmeter I own) is rated 2 to 30 MHz. Has anyone found any issues with it at the legal limit on 160m? Into a low SWR (like my 50 ohm Heath
I can't believe this. More fishnet beacons intruding on 160! I heard this one way before sunset. Call Freq NR3E 1.868 ADU1 1.910 Somebody please remind me where the page listing of 160 fishnet beacon