[Elecraft] Off topic feedline question

[David Kuechenmeister]

I didn't study this site too deeply, but KP4MD has the most appropriate characteristics on her page, here, http://www.qsl.net/kp4md/zipcord.htm.
You might also look at Owen Duffy's pages. His transmission line calculator is great. I think the last entry for zip 105 is zip cord, but you should email him and ask. The page is at http://owenduffy.net/calc/tl/tllc.php
vy 73,Dave N4KD 

    On Tuesday, November 7, 2017 9:12 AM, Michael Blake <k9jri at mac.com> wrote:
 

 My 80M antenna is a low, loaded dipole fed with balanced window line.  As the center impedance is  low the high impedance window line tries to invert the impedance to a much higher value.  The feedline is only 25' long and terminates in a 1:1 balun which is then connected to a remote autotuner via 24 inches of 9913F.

The question is:

Has anyone run any RF loss tests on the commonly available 12 gauge clear PVC insulated "speaker" wire.  The impedance would be quite low, probably in the 90 ohm range, and world certainly handle the applied power (500 watts) but I have not been able find any information regarding RF loss.

Michael Blake
k9jri at mac.com
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