Topband: 160 meter 1/4 vertical

[Charles Moizeau]

My earlier message should properly have read, "The free-space pattern of current in a HALF WAVELENGTH vertical (and also horizontal) antenna..."



From: Charles Moizeau <w2sh at msn.com>
Sent: Monday, July 3, 2017 6:09 PM
To: Herbert Schoenbohm; TopBand List
Subject: Re: Topband: 160 meter 1/4 vertical


>>The free-space pattern of current in a vertical (and also  horizontal) antenna...<<


Charles, W2SH



________________________________
From: Topband <topband-bounces at contesting.com> on behalf of Herbert Schoenbohm <herbert.schoenbohm at gmail.com>
Sent: Monday, July 3, 2017 4:46 PM
To: Jos Mols; TopBand List
Subject: Re: Topband: 160 meter 1/4 vertical

Forget about the high impedance issues on 40 and also 80.  IMHO the best
and easiest solution for you is to make some simple wire decoupling sleeves
or wire cage for the higher bands and they could be current fed like 160
meters and much less complicated to feed without extensive matching.  Also
1/.2 wave vertical are notorious for not working well with some obnoxious
lobes.  The only full wave verticals that I know to work are of the
Franklyn antenna design and require a decoupling at the 1/2 part with the
other 1/2 wave above it.  This is said to produce some low angle gain and
essentially double the radiated signal without the wasteful lobes at much
higher angles.

On Mon, Jul 3, 2017 at 3:53 PM, Jos Mols <jos.mols2 at gmail.com> wrote:

> Hi guys, currently working on getting a radial net worked into my garden &
> pavement. Appr 40 radials ranging from 10 to 40+ meters.
> I can raise vertical to appr 37 meters. main interest is 160 meters.
> I would liketo use this vertical for 80, 60 and 40 meters. Considering
> end-fed configuration for 80/40 so making hi impedance match. Wondering if
>  anyone has expereince with different options to achieve the same?
> Thanks in advance for your response.
> Jos PA0LSB
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