[TowerTalk] Stub tuning

Tom Osborne w7why at verizon.net
Mon Sep 12 00:35:17 EDT 2005


HI TT'ians

I'm trying to get the stubs hooked up here.  I cut some and they are right 
where I want them to be, using the MFJ tuner option.

I cut the 20 meter one right at the meter and wanted to hook them up on the 
outside of my antenna switch.  Going from the rig, there is about a 3 foot 
cable to the MFJ tuner/swr bridge.  Going from there is about a 3 foot cable 
to the homebrew antenna switch.

Problem is, when I move the stub from the bridge to the output of the 
antenna switch, I would think it would be too long and would have to cut 
some off.  What is happening is that instead of the stub being on 14.100 
(where I want it), it moves up frequency to about 15.500 instead of going 
lower if frequency as they are now about 6' longer.  Can't figure what is 
going on.  There is no dip down below 14.100.  Any ideas?  73

Tom W7WHY 



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