Laszlo, As I understand, you are mounting this on the roof of your building, so the ground system has to stay within the 20x26m roof area. From my model in EZNEC, it looks like it would be better to
As Guy, K2AV, noted, this antenna may be somewhat lossy, especially if the ground conductivity is poorer than average. One thing that is suspicious is the "good" SWR. My EZNEC model shows a feed impe
Rick, This works in theory, but the REALLY hard part would be getting the current phase and amplitude correct for the two sources. When I modeled this, the drive impedances at the two source location
Bob, Sounds like you should have a killer array on 160m with ground conductivity that is probably the next best thing to sea water! The input inpedance of each of the of the open-circuited 1/4 wavele
Base loading coils for short verticals can have a very high RF voltage across them (and also the base insulator). If he's running high power, there's a chance there is some arcing going on. Maybe he'
This link worked for me: http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
George, There is a modest amount of activity on WSPR (another K1JT mode) at a USB dial frequency of 1.8366 (with modulated tones between 1400 and 1600 Hz above this). Of course, WSPR is primarily a
73, Mike www.w0btu.com 1820 kHz is also 4 times the common 455 kHz IF. You could be hearing your own receiver(s). As a teenager, I used to listen to a 910 kHz AM station in Portland, OR, and some of
On 2012-11-03 8:25 PM, WO0W wrote: Perhaps you can take a portable transmitter and manual tuner to the site. At the point where you wish to place an L network, attach the manual tuner and transmitter
On 2012-12-25 7:40 PM, Jim in Waco WB5OXQ wrote: I meant a full wave loop If I can support a wire antenna at 50' or maybe more in tall pine trees and have 1.9 acres of space to use which would work b
On 2012-12-31 8:46 AM, Tom W8JI wrote: Years ago, when some fellow proposed that trees would radiate because they were fractals, I measured the RF resistivity of freshly-cut pine trees. I firmly atta
Top hats could be skirts if you feed the antenna through them. This design looks a lot like a conical monopole. Is there a distinction? Terry N6RY _________________ Searchable Archives: http://www.co