Re: OT Wet 450 ohm ladder line

Posted by w2bvh on Mar 17, 2009; 2:59pm
URL: http://elecraft.85.s1.nabble.com/OT-Wet-450-ohm-ladder-line-tp2491549p2491843.html

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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