Short Version: [snip] [snip] G'day! Thank you Steve for posting your results. In the Long Version: 1) A NEC4 evaluation of Steve's old "Marconi T", supporting Steve's magnitude of change. 2) Let's go
When I first installed my 3/8 over FCP here, it was PRE isolation transformer. Given the unfortunate 424' length of elevated Wireman #554 "450" ohm window line back to the tractor shack for conversio
I'll wait to comment until I've had a chance to read the book and see what's really in it, what kind of built and tried in contest experience, etc, and how it applies. 20 bux from ARRL plus shipping.
That part where you say "keep a low profile" is the real issue. Since trees routinely get to 100, and even up to 150 feet, objects of that size unless close and directly in line with runways are not
Hi Carl, Short version: The problem was never the wire in the air. Problem was the counterpoise. We'll see what Grant has to offer. Long version: I've ordered the book. I'm sure that the OT's got on
I've not had much of a chance to work on what you are talking about. But I've looked at it and tried to balance it out in models. Not much luck. Very tedious model construction, and issues with break
The other day I got my copy of Grant Bingeman's (KM5KG) ARRL published book "Short Antennas for 160 Meter Radio". Short version: As the title states, it's about short antennas, focuses on wires in th
BOGs can be as short as 195 feet for 160. They do NOT work the same way as beverages because the velocity factor laying against ground, or in it, is so low. VF on BOGs has been measured as low as 45%
??? BL&E was published in the June 1937 issue of "Proceedings of the Institute of Radio Engineers" Vol 15, No 6, p 753. More commonly known today as IEEE. Available through the IEEE from their online
Hi, Richard. Can you pass along your source of information that BL&E was done over 4 mS/m soil, as that is a matter of dispute among some of us and it would be excellent to have something authoritati
Perhaps that RCA material would have some additional data that did not pertain to the direct purpose of the study, or some other stuff, like where exactly were the measurements done, all the stuff th
If you can map your entire noise horizon, and point to a single major noise source where Xing that out is the issue, then what you are after is a NULL not a gain node. Two elements, with the NULL pre
Not that it was a surprise. Says it in the beginning and spends the last three pages on it. Was a focused commercial enterprise. 73, Guy. _______________________________________________ UR RST IS ...
It is precisely the high measured levels with merely 2 radials that gives me pause. After publishing the FCP I get new stories almost on a daily basis. It's very common for two elevated radials to pe
For a nasty application like that, look at Wireman #531 and Wireman other wires. If you use these wires you MUST prevent water ingress at the ends, or using them across constant abrasion points. If y
Wireman #531 or #547 both are black PE sheathed. #531 is stranded copperweld. #547 is fine stranded copper. 73, Guy. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw
When you do problems like this with modeling, be careful. While the wire moments are specifically calculated segment by segment, what gets calculated around ground is not literal calculation like the
Hi Richard, On your referenced fields graph you caption "Measured vs. Calculated" intensity, but the traces are not differentiated. Which traces on the graph are measured and which are calculated? 73
Disappears during daytime in Raleigh. S9, S9+5 here at night. Very steady level. No fades. High angle, louder on TX antenna. 73, Guy. _______________________________________________ UR RST IS ... ...
Figure out how to do that for a small lot backyard in an old European village with 900 year old homes. 73, Guy. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK