I use a variable phasing network for my 2 4BTV verticals that I use on 40 and
20 meters. The phasing unit consists of a roller inductor in series with one
antenna and a 500pf variable in series with the other antenna. The outputs of
those 2 components are joined and feed an antenna tuner connected to the rig.
I have a DPDT toggle switch so I can switch the 2 components to the opposite
antenna to change directions. The antennas are 17' apart and have a cardioid
pattern on both bands with at least 20 to 30 db front to back. I just wish
there was some way I could measure the forward gain. It is within 1 s- unit of
my 2 element yagi on 40 to VK and ZL.
WY3D
----- Original Message -----
From: Jan Erik Holm
Cc: 'towertalk'
Sent: Thursday, November 18, 2004 7:24 AM
Subject: Re: [TowerTalk] 80m 4Square Comtek box
People who likes to spend money buys Comtek boxes.
People who doesn´t makes a W7EL phaseing unit by
themself, not only will they save money but at the
same time they will get a better working 4 square
vertical array.
Also they might learn something technical in the
process.
73 Jim SM2EKM
-------------------------------------------------
Yo3ctk wrote:
> Tom,
>
> I read from your comments that the Comtek box doesn't work and cannot
> work. Is my reading correct?
>
> sheesh, I just bought one, based on favorable comments read on the net....
>
> 73 de Mike, YO3CTK
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
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