> He said to start with a 10 inch inside diameter single coax coil then
> wrap 10 turns around, like you would if you were coiling a water hose
> on the ground or for you Navy vets, a properly coiled of rope on the
> deck. This sounds like it would end up being 15 inches or more in
> total diameter, a bit big for an RF choke isn't it? Then hang the
> whole thing perpendicular to the boom. I even called their tech help
> line back later to be sure I had the directions correct and the same
> person said the coil would make an RF choke, not an "inductor", his
> terminology.
An RF choke and an inductor are the same thing. In this
application you create a reactance and that reactance is in series
with the OUTSIDE of the shield.
That is true if you use a solenoid or a pancake coil. Either would
function exactly the same in the system, the only major difference
is mechanical. A solenoid would actually be the preferred shape for
mechanical reasons, that is why you see very few pancake coils in
this application.
> I've seen photos of and several Mosley beams in person, but none had
> an RF choke like this one.
Few people like to do something that is more difficult to handle
mechanically, when there is no electrical advantage.
73, Tom W8JI
W8JI@contesting.com
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
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