I have been using the method that Jim mentions and it works very well and I
can work almost the entire 80 meter band.
Bill W5VX
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
Brown
Sent: Monday, October 21, 2013 11:45 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 80M Inverted V - CW and SSB
On 10/21/2013 2:50 AM, Doug Scribner wrote:
> I'd like to find a quick way to switch between the CW and Phone portions
of the band.
There's an easy method to obtain a broadband match using transmission lines.
Carefully tune the antenna for 3675 kHz. Feed it with a half wave, or a full
wave, of 50 ohm line beginning at the antenna, then a quarter wave of 75 ohm
cable, then as much 50 ohm cable as you need to get to the shack. Measure
those lengths carefully as a stub at 3675 using something like a MFJ 259.
This will give you a match in the shack below 2:1 from 3500 to 3900. Make
that first 50 ohm length the least number of half waves that will still
reach the shack. This method is shown in detail in a presentation I did
last year at Pacificon.
http://k9yc.com/PacificonSmithChart.pdf
<http://audiosystemsgroup.com/PacificonSmithChart.pdf>
73, Jim K9YC
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