"Chuck Olson" wrote in message
...
Today I clipped out the connection I had made at the bottom of the
radiator,
and the SWR bandwidth remained 2MHz as is was with the connection. The
group
of SWR measurements moved up an average of 150 KHz from my readings with
the
connection, but otherwise the performance of the "Slim Jim" configuration
is
identical. The length of the gap may now serve as a tuning mechanism,
which
wasn't a feature with the bottom connection, and the archives show some
builders made good use of that facility. Thanks for spotting the
similarity,
Jeff. My 6M antenna will no doubt be better for it.
73, Chuck


Chuck,
I searched on Slim-Jim. Let me see if I understand correctly.
Slim-Jim is a twin-lead or ladder-line type J antenna with the *top* of the
half-wave 9dual conductor) radiator ends connected.
Yours has the bottom of the 1/2 wave ends connected.
Am I to understand that the Slim-Jim configuration and yours have very
similar SWR BW?
This is good to know.

Then I'd like clarification on your comment:
"... If you analyze the operation of the very successful "Open Stub
J-Pole" that Arrow makes, you will find they use the 0.95 FV for both the
radiator and the stub,..."

Can you be more specific about this. What is the electrical length of the
stub for said analysis? I like that design, though there is controversy
about it.

73, Steve, K9DCi