Before tackling the last question, it needs to be pointed out that 60 evenly spaced 1/4 wave radials on the ground, and many (most) antenna wags would say that placing chicken wire should not make an
The problem would be that you need to trap out the BC signals BEFORE they reach the tuning diodes. In the good ole days with signals that were no more powerful than now, a small antenna, a coil, capa
It's baaaaccckkkk.... Band is back in NC. Worked Don, G3JMJ through the QRN at 0450Z. 449 and buried under QRN peaks 9+20. Base noise only S5 at 150 Hz bandwidth. Listened later, signal getting loude
This is an answer to an off reflector conversation, relating to a "too long" electrical length over radials reducing performance. I am writing to the list since the subject and it's objection occur i
This is a lot mushier for buried radials, but the simple case for elevated radials is that the standing waves are set by the distance of the end of the radials from the radial feed, just like it is o
I share the frustration over the very minimal amount of data out there. However... Erection of a 260 foot vertical in a testing environment fairly well requires the facilities of a large antenna rang
See http://www.fybush.com/sites/2005/site-051028.html For 1530 kHz, that's a PAIR of two vertical halfwaves in phase. 50 kW gives 3545.89 mV/m. Note the relative lack of neighbors, and therefore lack
Apologize for earlier half-done post. Spastic hit on send key. See http://www.fybush.com/sites/2005/site-051028.html for a Franklin and a nice article. For 1530 kHz, that's a *pair* of two vertical h
I don't really know for sure. But from modeling it and the article, I suspect not. He only talks about lack of 50 kW capable low Z strapping down to a radial field. He doesn't specifically say *no* g
Using an accumulation of remote beacon network measurements is probably the most reliable, and the only sky-wave measurement available to us for real, unbiased measurements for ham testing of this so
EZNEC's "fresh water" selection shows a conductivity of .001 (very unconductive). So it's talking about Great Lakes fresh water away from urban polution. Question would be how conductive the swamp wa
Particularly for the very minimal radial systems some are forced to live with, not having high angle radiation may actually be a considerable advantage. If one does not have "dense" and uniform radia
Sorry, have a misconstrued topic sentence below, probably from not finishing an edit of the sentence from a double negative. You can see that the topic sentence is at odds with the details. Thanks to
An alternate procedure to the cut and prune to 1140 kHz method, if one does not have an analyzer that goes down there, is to lay down a measured 151 ft (46m) as a DOG. This will usually measure somew
Part of the discombobbled nature of this RG6 discourse might have to do with a lack of detail on failure modes, dissipation, etc. With a long run, say 200 feet, running 1.5 K, and let's say dissipati
Too simple a formulation of issues. The loss is ground induction, by *whatever* means. You appear to be thinking that the radials are the only source of induced current loss in the ground. The vertic
This IS true for some hams, because their counterpoise situation is quite lossy. It would definitely not be true over a commercial dense radial system that was in good repair. It's very easy to measu
Among the possibilities, and the first you should rule out, is that since his improvement may have really improved his signal strength at your place, and since coils are not at all a common culprit f
Part of the mechanical problem of this is that two back guys to the top of the vertical, and then the wire pulling away horizontal, exert a downward compression force on the vertical, to the tune of
The Short Version. I'm not sure there are any list moderators that would tolerate the long version. It's a book. If you already have a dense, uniform 160m radial system, you know what you have. If yo