[TowerTalk] TowerTalk Digest, Vol 225, Issue 32

[ve3yv at pathcom.com]

Please post to list.  I also use the K9YC designed balun on my C3S.  Always
interested in improvements.  TNX!

73,  George VE3YV / K8HI
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Message: 1
Date: Sat, 25 Sep 2021 15:05:25 +0000
From: David Aslin G3WGN <david at aslinvc.com>
To: Eric Rosenberg <ericrosenberg.dc at gmail.com>
Cc: "towertalk at contesting.com" <towertalk at contesting.com>
Subject: Re: [TowerTalk] Old Force 12 C3-SS info needed
Message-ID:
	
<LOYP265MB239865078CA82B3052E08E80A7A59 at LOYP265MB2398.GBRP265.PROD.OUTLOOK.C
OM>
	
Content-Type: text/plain; charset="utf-8"

Eric,
Stan has provided some good suggestions.  I too have an old C3SS but with a
modern balun (K9YC design); it served me well for some years when I lived in
W6-land and now I'm back in UK it's planned as a fixed antenna as part of a
multi-beaming scheme.
If you decide to change dimensions (based on JK redesign, modelling or other
input) would you mind letting me know what those are?
73, David G3WGN M6O

-----Original Message-----
From: Stan Stockton [mailto:wa5rtg at gmail.com]
Sent: 23 September 2021 09:15
To: Eric Rosenberg <ericrosenberg.dc at gmail.com>
Cc: towertalk at contesting.com
Subject: Re: [TowerTalk] Old Force 12 C3-SS info needed

Eric,

I think at minimum I would replace whatever you are using for a balun with
something new and up to date from an engineering standpoint.  There aren?t
any 20 year old balun designs, whether a coil of coax or something using
ferrite,  you would want to use on a new antenna going up today.  

JK antennas has taken this antenna design and made changes to improve the
performance using computer modeling which is better than whatever method was
used to design the original antenna.  There would be no question in my mind
about which design would provide better results, particularly SWR curves.  I
would find out exactly what modifications are needed to duplicate the JK
antenna design.

Here is what you should expect with those changes.

https://jkantennas.com/c3s-jk.html

73? Stan, K5GO (ZF9CW)