[Elecraft] 75 ohm coax

[tony.kaz at verizon.net]

I have been using Commscope F660BEF for years for both receive lines and
transmit coax for my 80M 4-sq using F-connectors. The other year I had a
100' piece of RG6 that had a solid copper center conductor and a copper
braid. Compared that to the F660BEF on 1.8 and 3.5 for loss at 100'. I did
not see any difference in power loss. I guess the F660BEF has enough copper
plate to keep losses low on the low bands. Or maybe I just had a bad piece
of copper RG6?
N2TK, Tony

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Frederick Dwight
Sent: Friday, April 3, 2020 2:09 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] 75 ohm coax

If your 75 ohm coax has a steel/copper coated center conductor, be sure to
test it for loss on the lowest frequency band you will use.  I experimented
with a steel core 160 meter antenna and found it had some additional loss
and probably due to the inductance it could be shorter for resonance (10 %
perhaps ??) so I abandoned the idea.  Never noticed the effect on higher
frequencies. 

Sent from Mail for Windows 10

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