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

[Jim Idelson]

Here's an original OCFD presentation from Mike N1IW.

73 Jim K1IR

On Sun, Dec 6, 2020 at 2:17 PM Bob Ravenstein <bobrav at msn.com> wrote:

> 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
> *Sent: *Sunday, December 6, 2020 1:35 PM
> *To: *Steven Schultz <steven.schultz.m at gmail.com>; w1hh <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
>
>
>
>
>
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