[CQ-Contest] SO2R stubs.

[David Robbins]

246*V/F is the formula for length in feet.  check out my web page at
http://www.k1ttt.net/technote/k2trstub.html for the common lengths and
combinations and how to calculate.  the other links at
http://www.k1ttt.net/technote/techref.html#filters show analysis of pairs of
stubs and other stuff.

it doesn't hurt to cut long and trim down with an analyzer or by sweeping them
with swr meter and dummy load as velocity factors can vary quite a bit from the
catalog values.

Tom Osborne wrote:
> 
> 
> I've been compiling some data to build the stubs here and was
> wondering, what is the formula for determining the stub length.
> Is it just cut and try or what.
> I tried 234/F and for 40 meters came up with 21.75 feet.  Most of
> the posts say 23 feet open or shorted work best.  Where did the
> 23 foot figure come from.  I have a bunch of RG-6 CTV coax here
> that I'd like to use, but it has foam instead of plastic
> dielectric.  How to figure the length of stubs using the foam
> instead of plastic?  Thanks
> Tom W7WHY
> 
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-- 
David Robbins K1TTT
e-mail: mailto://k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net


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