Topband: Changes To My Shunt Fed Tower

[Howard K2HK]

Sounds like both of your ideas are good ones to try first. One other suggestion is to change from a gamma to an omega match. You're pretty close now so if the snow and cold doesn't impede your trips to the tower you ought to make that amp happy w/o too much problem

Howard..K2HK



> From: rgarrett5 at comcast.net
> To: j_fitton at yahoo.com; topband at contesting.com
> Date: Sun, 11 Dec 2011 12:21:56 -0500
> Subject: Topband:  Changes To My Shunt Fed Tower
> 
>
> 
> My match on the tower went from 1.0 x 1. To 1.9 x 1 after I installed the
> new antenna.  In terms of loss, this isn't a huge change but my amplifier
> doesn't like the change.  Before I spend a lot of time running back and
> forth to the tower making random changes, any thoughts as to what I can do
> to improve the match.  I'm currently using one series capacitor 1000PF for
> the matching network.  I have attempted to adjust this capacitor but it
> looks like the 1.9 x 1 is the low point.  Perhaps some thoughts - increase
> or decrease the spacing of the shunt wire?  Move the connection up or down
> on the tower?  
> 
> Before I get to crazy, just wanted to look to the base of knowledge on this
> reflector for your input.
> 
> 73 and tnx in advance.
> 
> Bob K3UL
> 
> 
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