Fwd: Re: [Antennas] Fwd: [Johnson] I'm not an antenna expert

[Ed Tanton]

I forwarded your email to the [Antennas] Reflector John... and 
included a request that any answers go to you personally, since I 
figured you weren't a member-else you'd have posted it there 
(too)-and this was one reply (which did not seem to go to the right 
place judging by the addressing.)

>X-Original-To: antennas at mailman.qth.net
>Delivered-To: antennas at mailman.qth.net
>Date: Wed, 11 Jan 2006 14:52:21 -0500
>From: C Whitaker <whitaker at pa.net>

///snip: of most header info


>de WB2CPN                   2006.01.04
>
>Try adding OR removing a few feet of the ladder line where it
>connects to the balun.  I hope you are using a 1:1 balun to connect
>the tuner to the ladder line, and place it not more than 6 inches
>from the tuner.  Then collect more SWR data, and go from there.
>Let us know how it works out.
>
>The reason for changing the length of the ladder line is that the
>impedance and reactance characteristics continually change all
>along the ladder line, and that depends on the frequency (bands).
>What you're trying to do is find a spot where all the bands will be
>fairly happy.  Worse case, when the system has a high "Q", is to
>wire the ladder line through a knife switch that will remove a
>few feet of line.  I really doubt you'll need to go that far.
>
>73  Clete
>
>
>
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72/73 Ed Tanton N4XY <n4xy at earthlink.net>
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