[TowerTalk] coax stubs

[David Hachadorian]

----- Original Message ----- 
From: "Gregg Seidl" <K9KL at centurytel.net>
To: <TowerTalk at contesting.com>
Sent: Wednesday, June 14, 2006 3:07 AM
Subject: [TowerTalk] coax stubs


> Can someone please refesh my memory.You make a shorted 1/4 
> wave for 20 meters and it blocks what?I only have to do 
> this once a year for FD so I tend to forget!!??We are 
> planning on running 20M,40M and 75/80M plus 6M.20 will 
> switch to 80 when the sun goes down.40 will stay on all 
> the time unless 6 opens up.Thanks   Gregg  K9KL
---------------------------------

Well, a shorted .25 stub for 20 passes 20 and rejects 10,
not very valuable.

Here is a better trick to remember:
40m .25 stub (23' @ vf=.66)
shorted, passes 40/15, rejects 20/10
open, passes 20/10, rejects 40/15
Make one stub, use a switch to open/short the tail.

Dave Hachadorian, K6LL
Yuma, AZ