[bars] Sat AM Zoom discussion of Off-Center-Fed Dipole (OCFD) and list of possible topics for other discussions or presentations

[Bob Ravenstein]

Jim

I found this OCFD presentation on Power point with notes from Mike

Bob
W1FDR

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: n1hts at comcast.net<mailto:n1hts at comcast.net>
Sent: Sunday, December 6, 2020 1:35 PM
To: Steven Schultz<mailto:steven.schultz.m at gmail.com>; w1hh<mailto:bars at w1hh.org>
Subject: Re: [bars] Sat AM Zoom discussion of Off-Center-Fed Dipole (OCFD) and list of possible topics for other discussions or presentations

Attached is N1IW's (SK) balun presentation he did at BARS.
I can't find his OCFD presentation so if someone has that
they can post it as well. We did a balun building BARS meeting
for the 4:1 current balun and folks put up their OCF dipoles.
Of course Mike's balun is for legal limit power. I believe N1ALO
built a smaller version for 100 watts and is using it.

All good info Steve.

jim

On 12/05/2020 9:53 PM Steven Schultz <steven.schultz.m at gmail.com> wrote:


Hello BARS,

The Sat AM Zoom meeting today got into a discussion about Off-Center-Fed Dipoles (OCFDs).  This topic raised my interest in discussing or presenting topics such as:

Transmission Line Transformers
Balun/Unun Construction
Modeling Dipoles and Off-Center-Fed Dipoles with 4nec2 or EZNEC
Off-Center-Fed Dipole Variations
Feeding Off-Center-Fed Dipoles
LTspice, a graphical SPICE tool from Linear Technology and Analog Devices

Both 4nec2 and LTspice are free.

I do not proclaim to be an expert on these topics, but over time, I have gained some worthwhile experience with them.

What follows here are my comments about one kind of feed point mechanism for a particular OCFD.  I then discuss some other feed point mechanisms for some other configurations of the OCFD.

Read on if you wish.  Feel free to pass along your comments to me about either this prelude or the discussion in the attached file.

73’s,
Steve Schultz
AC1EX
BARS, Philips ARC, and MGEF
steven.m.schultz at ieee.org<mailto:steven.m.schultz at ieee.org>


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