Exactly Jim...that is what I want to do. Except I was going to make the
20-meter elements shorter for 18Mhz and the 10 meter element longer for 24
while leaving the 15 meter element the same. This would give me a slightly
smaller and lighter antenna for 24 15 and 18.....although I really don't
need 15.
Herb, KV4FZ
On Fri, Nov 29, 2019 at 1:41 PM Jim Thomson <jim.thom@telus.net> wrote:
> Date: Thu, 28 Nov 2019 13:58:27 -0400
> From: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
> To: towertalk@contesting.com
> Subject: [TowerTalk] JK C3S WARC Modifications
>
> <I have a C3S tribander which I seldom use except when on WARC bands. It
> is
> <useable there but not as good as I think it would be modifying it for 24
> <and 18Mhz. I wonder if anyone has tried that? I don't care about 10 and
> <15. I think by just changing the dimension, i.e making the 10-meter
> <elements longer for 24Mhz and the 15-meter element shorter to cover 18
> <Mhz, would possibly work. Is there anyone who has done this successfully?
>
> <Herb, KV4FZ
>
> ## contact Ken at JK ants. No need to buy a megabuck new
> yagi....then ship it to KV4 Land.
> The issue with the F12 els is.... the brackets for ele to boom are
> fixed In place. The saving grace is the
> 18 + 24 mhz bands are only 100 kz wide.
>
> ## BTW, ur 15M eles would have to be made LONGER, not shorter. I
> would shorten the 20M
> eles..and relocate them to where the 15 els currently reside on
> the boom.
>
> ## what u propose is easily doable..at zero expense.
>
> ## Then u end up with a 18 + 24 mhz duobander...with flat swr
> + good gain + good FB.
>
> Jim VE7RF
>
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