[TowerTalk] Chokes and ground mounted verticals
Jim Lux
jimlux at earthlink.net
Sun May 27 13:53:20 PDT 2012
I'm fooling with a new vertical installation.. (happens to be a trapped
BTV6, but that's probably not relevant). Base of the vertical is about
4' off the ground and I've got half a dozen radials strung along fence
lines, ground, etc. essentially random lengths, but that's why...
there's an autotuner at the base.. as long as the impedance is
moderately within range, it will tune.
Several of the ground radials run along the path of the coax back to the
shack..
So, I'm planning on a choke on the coax at the tuner (and where it goes
into the nouse)..
And, I need a choke on the power to the tuner (and various other stuff
at the base, eventually).
the burning question..
Can I run power and coax through the same stack of cores? Or should I
choke them separately.
Do I even need to choke the coax at the tuner.. who cares if the outside
of the feedline acts as another radial.. maybe it will even work better.
It's not like I'm looking for a perfect match at the feedpoint (that's
what the tuner is for).
I need to choke the power (because RF on the power will almost certainly
confuse the processor in the tuner) (or maybe not.. maybe SGC designs
them with enough filtering?)
Maybe I should just choke where it comes into the house?
(distance from antenna to house is about 25-30 feet..
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