es should help you a LOT! Have fun and have a Merry Christmas!
73,
Charlie, K4OTV
-Original Message-
From: Larry K4AB [mailto:larry.k...@gmail.com]
Sent: Wednesday, December 10, 2014 8:23 PM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: 160 Shunt-Fed Tower Readin
gt; BTW - I AM an RF engineer and I have spent q lot of my career designing and
> measuring antennas
>
> 73,
> Charlie, K4OTV
>
>
>
> -Original Message-----
> From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Larry
> K4AB
> Sent: Wednesday, December
e: Topband: 160 Shunt-Fed Tower Readings
>I would like to know how you can get 15893pf from a 1000pf capacitor. That
>has to be a mis-read value there...gary maybe rounded off to 159pf??
That's a great question. Where is the analyzer actually getting that
reading?
73,
Larry K4
sting.com] On Behalf Of Larry
K4AB
Sent: Wednesday, December 10, 2014 6:14 PM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: 160 Shunt-Fed Tower Readings
" line
>Why do you feel a need to improve it?
Thanks for the response, Charlie!
I'm concerned about a fe
>I would like to know how you can get 15893pf from a 1000pf capacitor. That
>has to be a mis-read value there...gary maybe rounded off to 159pf??
That's a great question. Where is the analyzer actually getting that reading?
73,
Larry K4AB
On 12/10/14, Tom W8JI wrote:
>> I'm concerned about
I'm concerned about a few things:
1) I'm thinking the antenna is electrically too short. After all, the
Yagi at the top really isn't adding too much top loading. And I'm
thinking
adding a couple of top loading wires connected to the tower
might be beneficial.
If you run any power, you will
>Why do you feel a need to improve it?
Thanks for the response, Charlie!
I'm concerned about a few things:
1) I'm thinking the antenna is electrically too short. After all, the
Yagi at the top really isn't adding too much top loading. And I'm thinking
adding a couple of top loading wires conne
>From your description and your measured data, Larry, I don't see how you
could improve the antenna noticeably! Why do you feel a need to improve it?
I appears to be resonant, well-matched and it appears to have an excellent
ground image system! I think you might be kidding yourself if you chang
You may be able to improve the antennas performance by taking the out
side insulated elements at the center to the boom with hand wound
chokes that pass only below 5 Mhz or lower to provide some top loading
without impacting the Force 12 performance. You may also be able to get
a better feed
