[Elecraft] Elecraft Digest, Vol 213, Issue 6

[Bob McGraw]

Based on my measurements and method I used to measure 100 ft of window 
line, the loss in the line from dry to wet is frankly nil. However, the 
wet line does show a velocity factory change, in effect an electrical 
change in line length, and thus when connected to an antenna, will have 
a small effect on the impedance at the station end of the line.

I really think and believe many comments and opinions regarding window 
line, are more "old ham lore" not based on true and complete facts.

73

Bob, K4TAX


On 1/14/2022 12:26 PM, elecraft-request at mailman.qth.net wrote:
> Message: 17
> Date: Fri, 14 Jan 2022 11:26:13 -0700
> From:ho13dave at gmail.com
> To:elecraft at mailman.qth.net
> Subject: Re: [Elecraft] [OT] Loss in window line [OPINION] [LONG]
> Message-ID:<CA9FBF80-BA6D-4E4B-9AF8-15C2D5791B55 at gmail.com>
> Content-Type: text/plain;	charset=us-ascii
>
>
> I concur with the conclusion that water has little effect on window line. I base this on my own experience using window line for years. I always feed it into a tuner and, if water has any effect on the line, I have to adjust the settings of the tuner. It is only necessary to adjust the tuner under very heavy rain. Anything resembling a normal amount of water on the line has essentially no effect, even after years of dirt buildup.
>
> Years ago, when I had a swimming pool, I spanned the pool with a length of underwater ladder line and made some simple measurements that indicated only a nominal change. And pool water is purposely chlorinated, which increases the conductivity, although I don't know by how much.
>
> 73 de dave
> ab9ca