[Lowfer] FW: 600MRG> Helically wound vertical on a city lot>NO WAY!!!

Fri, 22 Mar 2002 21:39:24 -0600

Wouldn't there be a huge AC and DC resistance in all the wire??? That is
what I was thinking. I believe that it takes close to 1/2 wavelength of wire
to wind a helical 1/4 wave vertical. That would be about 2811' of wire. I
suggested the typical 50' Lowfer vertical and got clobbered for saying so.
I'll stick to the Ashlock loop I know it will work. If I had a treeless lot,
I would go with a Les style vertical, as I know it works for that
application. But then again, maybe two wood masts with an Ashlock loop
between them... Hmmm. I think I'll keep my opinions to myself for now on, as
there seems to be some irate people on the lists lately. Not you by any
means. I just got back from the Depot and picked up what I needed for my
improved powerline style insulators. I'll get you pictures tomorrow at the
latest and will create a new page on my web page for all to see what I have
been up to lately. People keep asking me where is it, well I will get it
there this weekend. I received my Terman book today; it is in perfect
condition. Thanks to Andre' for the suggestions on that book and others.
C-YA-Later,
Mike>WE0H
http://www.geocities.com/we0h/index.html

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Bill Ashlock
Sent: Friday, March 22, 2002 8:36 PM
To: [email protected]
Subject: Re: [Lowfer] FW: 600MRG> Helically wound vertical on a city lot>NO
WAY!!!

Mike,

>Here goes a good argument if anyone wants to take it on. This is all >about
>some other guy wanting to build a helical wound vertical for >166.5kc. I
>told him that it wouldn't work.

Why wouldn't it work? A helical wound vertical is just a stretched out
loading coil that uses the capacity of the upper portion to form a resonant
circuit. Trouble is - the Q of the system is not up to par with typical top
loaded verticals since the ideal 2.5 diameter/length ratio for an inductor
is violated to a big degree. Therefore the all- important antenna current is
inferior to a typical vertical.

Bill A

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