RadioBanter - View Single Post - Semi-related: FM Dipole Total Length

George Cornelius · March 29th 17, 02:26 PM posted to rec.radio.shortwave

In article , writes:
George Cornelius wrote: "Note that the feed line is _not_ part of the antenna. "

That's what I always thought, so I
figured it's length(height) did not
matter. I think I'm just wayyyy
over-complicating this matter, and
should go with a simple zip-cord
dipole. Like I said, the old one
worked great, even with one half
broken off and tied around the
feed line. It was even pulling in
stations when it was detached from
the stereo receiver and sitting
in a pile in the corner!

Actually, any metal nearby will affect reception,
so that isn't such an odd statement as it sounds.

But, anyway, thanks for sending me a jpeg. I had it
all wrong in my head about how you were set up, and,
yes, with your F-connector to screw terminal balun
plugged directly onto the connector at the back of
the set you would have a pure vanilla installation
for twinlead and, if a-d is right, with about 1/2
wavelength - say five feet - of parallel feedline,
300 ohm or not, to the antenna, then we may be
able to rule out feed line as an issue and that
leaves the antenna. Shortest path between two
points: put another balun at the far end, tie it
to two 2.5" lengths of ordinary wire, and use
five feet of the speaker wire feed line between
them. You can always figure out how to drop the
baluns and use coax later on. Or to beg borrow
or steal five feet of twinlead from someone.

As I mentioned privately, I have the following old
commercially made FM dipole and am willing to ship it
to you:

64" end-to-end
70" feed line
1.75 oz weight by my little handheld postal scale balance

George