[Elecraft] KAT 500 and open wire

[Bill Johnson]

You can buy spacers for #14 insulated house wire that would also work wonders and be a cheaper but best solution.

73,
Bill
K9YEQ

https://wrj-tech.com/

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Al Lorona
Sent: Friday, January 18, 2019 8:08 PM
To: Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KAT 500 and open wire

 G3TXQ's work here is awesome, as is N7WS's before him. I'm thinking two things:

Thing 1 is that, clearly, water really messes up window line's loss. However, I'm guessing that a/ in a place like southern California, where perpetual drought is the new normal; and b/ in an installation where the window line, rather than running perfectly horizontally so water can pool, has a slant, allowing it to shed water; a ham would probably be fine using it. All one would have to do to discourage pooling on a horizontal run is twist the line once every few meters.

Thing 2 is that G3TXQ shows matched loss at 6.72 MHz in heavy rainfall increasing from 0.2 to 1.1 dB per 100 feet, which seems totally acceptable for worst-case rainfall. In moderate rainfall the loss increased to only 0.34 dB/100 ft. That's lower than any coax out there.

I myself would never use it (for reasons other than water loss), but window line seems like an okay choice for those hams who can't or won't use coax.

Al  W6LX
 

Glossary:

"Window line" = Wireman 551 or 552 or equivalent



>>> http://www.karinya.net/g3txq/wet_ll/


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