[Boatanchors] Good (And Bad) Lengths For End-Fed And Dipole Antennas

[Mark K3MSB]

 I think the confusing part was  " "random-wire" end-fed antennas ";   what
was meant is random length end-fed (or center fed) antennas.

Don, thanks for posting those links.    The one I've used is
http://ocarc.us/docs/antennas/MultibandCenterfedZepp.pdf.

73 Mark K3MSB

On Tue, Nov 24, 2020 at 7:18 AM D C _Mac_ Macdonald <k2gkk at hotmail.com>
wrote:

> NO problem if you are talking about a single band 1/2 wave dipole.
>
> This all about building an ALL-BAND antenna, either end-fed or fed
> at center with parallel line (ladder/window/open wire).
>
> Sorry if that was not obvious.
>
> An E.F. Johnson matchbox may very well match just about any load,
> regardless of impedance and wild reactance.
>
> 73 - Mac, K2GKK/5
> Since 30 Nov 1953
> Oklahoma City, OK
> USAF (Retired) 61-81
> FAA (Retired) 94-10
>
> ________________________________
> From: Rob Atkinson <ranchorobbo at gmail.com>
> Sent: Tuesday, November 24, 2020 05:15
> To: D C _Mac_ Macdonald <k2gkk at hotmail.com>
> Cc: boatanchors at mailman.qth.net <boatanchors at mailman.qth.net>
> Subject: Re: [Boatanchors] Good (And Bad) Lengths For End-Fed And Dipole
> Antennas
>
> Thanks for taking the time to post this data.
>
> >BAD:  16  19  22  26  32  33  38  44  46  48  52  64  65 66  76  78
> >80  88  92  95  96  99  104  110  112  114  123  128  130 132
> >133  138  144  152  154  156  160  165  171  176  182  184
>
> I guess I don't understand what this means.  If I am correct it tells
> me that a 80 m. half wave dipole fed in the center with each side 65
> feet long is "bad."   That's a 1/2 wave dipole 130 feet long which
> according to the ancient formula is cut for 3600 kc.   That's exactly
> what I have, fed with ladder line and a KW Matchbox and it works FB.
>  The numbers list says 130, 128 and 132 feet are bad.  Does this mean
> 131 feet is okay?  That seems ridiculous.  So I must not understand
> this.
>
> 73
>
> Rob
> K5UJ
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