[TowerTalk] Stub tuning

[paul@w8aef.com]

When I was cutting stubs for a DXpedition I concluded that the length 
included all wiring after the loading capacitor in my amplifier to the end 
of the stub.

They worked great on two DXpeditions but I never could get them to work at 
the home QTH.

de Paul, W8AEF

----- Original Message ----- 
From: "Tom Osborne" <w7why at verizon.net>
To: "Towertalk" <towertalk at contesting.com>
Sent: Monday, September 12, 2005 4:35 AM
Subject: [TowerTalk] Stub tuning


> 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