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Re: OT Wet 450 ohm ladder line

Posted by Bob Cunnings NW8L on Mar 17, 2009; 2:35pm
URL: http://elecraft.85.s1.nabble.com/OT-Wet-450-ohm-ladder-line-tp2491549p2491725.html

N7WS took a look at precisely this subject:

http://users.triconet.org/wesandlinda/ladder_line.pdf

BTW I use 450 ohm ladder line here to feed a c.f. vertical wire
doublet for multi-band operation using a balanced tuner - at least
when dry, it's the best option to keep loss low and for mechanical
reasons too.

Bob NW8L



On Tue, Mar 17, 2009 at 8:04 AM, Geoffrey Mackenzie-Kennedy
<[hidden email]> 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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