[Elecraft] Loss in window line

Paul Gordon N6LL n6ll at pacbell.net
Fri Jan 14 17:07:54 EST 2022


Waxing about old ham lore, a "Strays" item on page 132 of the December 
1946 QST has W6KA repeating advice from W3LPY and W1MJH that 
"Simonizing" 300 ohm line (or using floor wax) will "eliminate the 
impedance change during rainy weather."

Paul, N6LL - current Trustee of W6KA

p.s.- That would be the impedance presented to the transmitter which 
changes, not the characteristic impedance of the line.

On 1/14/2022 1:22 PM, elecraft-request at mailman.qth.net wrote:
>
> 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


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