[Elecraft] OT Wet 450 ohm ladder line

w2bvh w2bvh at comcast.net
Tue Mar 17 10:59:12 EDT 2009


I find the antenna system loses a *lot* of its effectiveness when the 
ladder line is wet. As a guess I'd say a half or more of the received 
signal strength is lost (and , I suppose, similarly for transmit) when 
the line is wet..

When not wet its a very effective component in my antenna system. I've 
been using a 131' center fed Zepp with ladder line and Cecil Moore's 
(W5DXP) "non-tuner" for about 10 years and am very pleased with the 
results. See http://www.w5dxp.com/notuner.htm for details.

73,
Lenny W2BVH


Geoffrey Mackenzie-Kennedy wrote:
> Sorry for an off-topic question. Does anyone have any information about the 
> dry vs wet characteristics of "450 ohm" ladder line? I have never used this 
> type of line, but I might have to use it for "mechanical" reasons to feed 
> another antenna now being built. I am told that its characteristics change 
> when wet from rain, but which characteristics change and by how much at HF. 
> A remote ATU to compensate is not to be used with this particular antenna / 
> feeder.
>
> Any comment would be appreciated.
>
> 73,
>
> Geoff
> GM4ESD 
>
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