[TowerTalk] Fwd: Coax loss. Has anybody measured it ?

[Hans Hammarquist via TowerTalk]

Dan,


Not that is should matter that much (as a few % extra losses doesn't really affect the S reading) but do you see and decay due to corrosion of the surface of the wires? 


I know that Al wires are less affected as AlO2 is non-conductive contra to CuO that is a semiconductor. Needless to say Fe wires show higher losses as steel is a bad conductor in it self and corrode heavily. I believe zink (as in galvanized steel wires) is a lousy conductor too. Useful in Beverage antennas though.


I, myself, am using insulated #14 OWL for my feed to an OCF dipole. As I have my shack next to the tower I only have ~ 4 feet of horizontal runs.


73 de,


Hans - N2JFS



-----Original Message-----
From: Donald Chester <k4kyv at hotmail.com>
To: towertalk <towertalk at contesting.com>
Sent: Mon, Nov 24, 2014 11:53 pm
Subject: Re: [TowerTalk] Coax loss. Has anybody measured it ?


-:-

I doubt  that the increase in efficiency of OWL over coax makes any perceptible 
difference in signal strength at the other end of the QSO, but I still find 
satisfaction in knowing I am not wasting that additional 5% of my RF power in 
the transmission line, given that there must already be measurable losses in the 
transmitter tank circuit as well as in the ATU at the base of the tower. But the 
main advantage is knowing I won't have to replace the OWL every few years after 
transmission line losses gradually creep up.


Don k4kyv
 		 	   		  
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