Any series resistance or inductance will slow the incoming wave down and
increase the tilt and the length where it reverses direction can be
calculated since a 50% VF is the crossover point. A Beverage by definition
is a slow wave antenna.
I use 2 types of military telephone wire for 5 reversible 2 wire Beverages.
One is a copper/cadmium alloy and the other Im not sure but its the common
WD-11A that many use. At 500-900' they seem to be no different than
predicted.
I find 60dB nulls a bit of a stretch on a regular basis on any sky wave
signal. Some here may have hit 40 on a fluke but 20-25dB seems average and
with some a bit worse.
Carl
KM1H
----- Original Message -----
From: "Bruce" <k1fz@myfairpoint.net>
To: <topband@contesting.com>
Sent: Thursday, December 29, 2011 6:23 PM
Subject: Topband: Galvanized Beverage antenna wire inquiry
> Early in 2007 I took a survey about Beverage antennas on this reflector.
> /archives//html/Topband/2007-02/msg00062.html
>
> Earl K6SE (sk) was the one making exact termination test on his 7' above
> the ground Beverages. He was using AWG 17 galvanized steel electric fence
> wire, the longest (1100 FT.) achieving 60 db front-to-back and 60-db
> front-to-side. He replaced the galvanized wire with copper wire, but did
> not achieve near the same results, so went back to galvanized. In
> additional emails, Earl believed that it was the resistance of galvanized
> wire, making unwanted signals travel twice the resistive distance.
>
> Has anyone else done Beverage wire comparisons, and what results?
>
> 73
> Bruce-K1FZ
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
>
> -----
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_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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