[TowerTalk] [Bulk] Re: antenna choices for K4XS

[Bry Carling AF4K]

Very good point. I do not know whether these deep scientific studies were done at NEAR 
FIELD to the antennas or at distances of hundreds of miles away.

The articles / books claim that these yagoi beams have virtually no gain at all. I wonder 
whhow NEC would stack up against their measurements? It's in a boob, or article so it MUST 
be true. I am just left pondering the same as you - trying to decide where ALL that extra 
power is disappearing to...

On 13 Apr 2015 at 7:40, Markku Oksanen wrote:

> On "Low Performance Trap Antennas" :  Is it really known what is the cause for the apparently very large difference between a correctly designed trap beam, say a TH6DXX or similar and one of the not so good performers?  Trap loss can't be a big part because even relatively low power loss at a given trap, say 50 W, will burn the thing very quickly.  Assume 3 elements, 6 traps that get exposed on a given band and -3dB gain compared to better beam, this would be some 1500/2/6 watts, a lot of watts per trap.  Even it not this much just loss, there would be ample power to melt the insides of the trap.
> MarkkuOH2RA/WW1C 		 	   		  
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