Re: Topband: Beverage feedline suggestion

[Paul Higginson <paul@greenrover.demon.co.uk>]

In message <4046B81C.3020004@buffalo.edu>, David J Rodman MD 
<rodman@buffalo.edu> writes
> My beverage antenna to Europe was cut down by new property owner. The 
> best replacement configuration on my OWN property is 580' at 40 
> degrees.  The only problem is the coax feed line is approx 600' from my 
> beverage coax switch and another 200' to the station.  If the antenna 
> is to be used on 160 and 80m, what feedline is suggested to maximize 
> signal and minimize cost.  Right now the antenna is fed with "mini" 
> RG59 and the antenna is at least 1 S unit less noise than my other two 
> antennas.  I presume the quietness is loss of signal from the feed line 
> length.  I haven't matched the antenna to the feed transformer yet, but 
> it is hard to imagine that would be 6-10dB loss.  Thanks for opinions. Dave.

RG59 has an attenuation of just less than 1.1db per 100m at 1 Mhz and 
this rises to about 3.5db per 100m at 10Mhz.

If correctly matched your  250m of feeder on top band is only 
attenuating the signal by a few db.

The loss rises dramatically when you mismatch  thin coax, I'm not a 
betting man but I would guess that would be a good place to start 
investigation.

HTH

Regards
--
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com

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