Topband: T vert feed

[Charles Moizeau]

Nope.

With 100 Ohms per radial and 60 of them all the same and in parallel with each other, one gets 1.66666 Ohms; close enough.

73,

Charles, W2SH  

> From: royanjoy at ncn.net
> To: topband at contesting.com
> Date: Mon, 30 Jan 2012 12:15:10 -0600
> Subject: Re: Topband: T vert feed
> 
> 'Twas stated:
> 
> "Feedline coax shield 1.7 ohms.
> 
> The single 1.7 ohms lowers the voltage and even in this case of what
> appears to be an excellent ground radials system, the coax will carry HALF
> the counterpoise current and waste most of that power, besides being a 
> link...(etc.)"
> 
> 
> Whaaat???
> 
> Where did that 1.7 ohm figure come from....space?
> 
> The size (gauge) of radial wires has very little effect on their 
> effectiveness as radials, according everything I've ever read. Also, 
> effective resistance to ground, due to such intimate coupling to earth when 
> radials are at the surface or buried, evens out their equivalent resistances 
> and reactances, rendering them "un-tuned." Not comparable to elevated 
> radials at all. Voltage and current nodes on surface or  buried radials are 
> smoothed and averaged out rendering them un-problematic.
> 
> If no balun, including a choke-type, is used at the feedpoint of a vertical 
> then the coax braid simply counts as another radial, averaged in with the 
> many. Ferrites at the shack end can attenuate any residual RF on the braid 
> if it is troublesome there (unlikely).
> 
> 73,   Roy           K6XK            Iowa
> 
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