Tom: There is a very complete set of measurements which will answer all
of your questions at
http://www.berkshire.net/~robbins/technote/airbalun.html
73, Dan, N5AR
Tom Martin wrote:
>
> I have read so many posts about baluns and SWR that I am thoroughly
> confused! I am going to be erecting a 96 foot tower with a 5 element
> Telex 20 meter monobander and a 2 element S-402 by Mosley and a 3
> element Telex 10 meter monobander. I want to avoid the ferrite core
> balun and use a coax balun. I can get no consensus about how many
> windings, how many inches for the form, etc. The manuals, antenna
> books, and TowerTalk members suggest 12 turns, 6 turns, 8 turns, 4-6
> turns, all on either a 4 inch form, or a 6 inch form, or air wound and
> taped. The list of suggested turns and methods of windings goes on and
> on, not to mention what type of coax to use: 213, 58, 8U, 8X, teflon,
> etc. The Mosley instructions don't mention a balun at all which I didn't
> use at a previous QTH. I didn't notice any problems with front to back,
> gain, or TVI/RFI without a balun on the 402.
>
> So, what's a fellow to do???
>
> Also, I agree that trying to get the perfect match 1:1 SWR is an
> obsession with a lot of hams. Of course, the use of solid state rigs
> has fostered this mania. My 830 will get out fine with a 5-1 SWR.
> However, it is a bit disconcerting to see the reflected meter pegging
> the post on voice peaks when using the amp. 73 to all. Tom
>
> List Sponsor: Champion Radio Products - We'll be at the Dayton Hamvention
> with all of our safety equipment and other products. Stop by booth #559 and
> say hi.
> <A HREF="http://www.championradio.com";>www.ChampionRadio.com</A>
>
> -----
> FAQ on WWW: http://www.contesting.com/FAQ/towertalk
> Submissions: towertalk@contesting.com
> Administrative requests: towertalk-REQUEST@contesting.com
> Problems: owner-towertalk@contesting.com
List Sponsor: Champion Radio Products - We'll be at the Dayton Hamvention
with all of our safety equipment and other products. Stop by booth #559 and
say hi.
<A HREF="http://www.championradio.com";>www.ChampionRadio.com</A>
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|