Sal M. Onella wrote:

Bryan wrote:
Jim exclaimed:
Bull----. It is NOT a bazooka, it is a simple ground plane with bent
over
rods.

STOP TRYING TO CONFUSE THE GUY. It is a simple ground plane with
removable
radials. STOP POSTING ABOUT THE STUPID BAZOOKA.

Jim

Alright, it's not a bazooka; it's a decoupling sleeve (thank you for the
enlightenment). Semantics aside, it will do what the OP wishes it to,
and
in a physical representation that will work within his constraints.

Regards,
Bryan


Either way, do we know the impedance? That is an "easy build" and I want
to
try some single-band, no-tuner HF antennas. I cut one for 350 MHz
receive-only some years back (for the Blue Angels' radios at an air show)
and it worked fine.

One more thing: Assuming a nominal 50 ohm match can usually be made, is
there any drawback to tuning the thing by making the braid a little longer
than calculated, moving the end of the braid up and down to find the best
match and then securing the end? I mean, if you don't mind a somewhat
lumpy-looking sleeve. (I'm a bit lumpy-looking, myself.) The decoupling
capacitance would be reduced by both the decrease in length and the
increase
in spacing, but the changed value would be, in effect, part of the tuning.

"Sal"

It's a dipole, so it should look like 50-75 ohms to the feedline. I'm not
sure I follow your line of thinking in regard to moving the shield up/down.
Bryan