Just thinking about this question says one of three answers might work here:
1> add top loading and be ready to adjust for your favorite frequency.
2> measure the R +j of the existing shunt feed and build up a matching
network for each frequency of interest. The usual shunt feed matching network
will
likely provide much of the matching capability needed.
3> a combination of both 1 and 2 to allow improved/optimized bandwidth.
73,
Gerald K5GW
In a message dated 9/18/2006 9:46:21 A.M. Central Daylight Time,
n3ox@n3ox.net writes:
I don't know much about shunt feeding towers, but more top loading is
an efficient way to go. Sounds like you wouldn't need a whole ton of
it to get down to resonance on 160, but I guess you already have a big
beam on top if a 68' tower is resonant just above 160
I'm sure there's a base matching method you could use as well, but I
don't know it.
Dan
> What is the next step here? Do I need to work on adding more top loading
to the tower to make the electrical length longer?
>
> John
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