[Antennas] Information Please?

Tue, 11 Mar 2003 17:14:57 +0000

Dan,
   Thanks for the reply! A little background might be in order here:
I built a double extended zep for 80-10 out of 450 ladder line and "foled" 
it by shorting the ends of the arms leaving the lower wire open at the 
center. I drooped the final 20 ft of each arm and achieved significantly 
lower radiation angles and better DX!  However the rainy climate here causes 
real problems with the ladder line.  I have solved this by constructing open 
wire feeder to replace the ladder line. Since
I will be constructing a balun for this setup, I figured that it was just as 
easy to go for a 9:1 "match" as the 4:1 "isolation." I am using a Kenwood 
830 modified for QRP and want to eventually get a 5B WAS on 5 watts or less! 
I alked to somebody with this antenna setup and they felt the small 
improvement in the 9:1 vs 4:1 wasnt worth the expense. I disagree, since 
"real dx begins at the noise floor, ANY improvement is worthwhile! HI HI  
Any and all comments are welcome!

  "Communications" is a People skill, the rest is technology.
             Durwydd MacTara

>From: Dan Richardson <[email protected]>
>To: "Durwydd MacTara" <[email protected]>
>Subject: Re: [Antennas] Information Please?
>Date: Tue, 11 Mar 2003 06:53:00 -0800
>
>At 10:10 AM 3/11/2003 +0000, you wrote:
>>I need to construct a 9:1 Balun and dont know how! I need to match the 
>>RG-213 from my shack and tuner to a 450 ohm Balanced load.  Where can I 
>>learn? Where do I find parts?
>>
>>  "Communications" is a People skill, the rest is technology.
>>             Durwydd MacTara
>
>Are you planing this for feeding a tuned fed dipole or do you truly have a 
>450-Ohm balance load? My reason for asking is that if it is the former then 
>you wouldn't be gaining anything be using a 9:1 balun. (I would be glad to 
>explain if you wish)
>
>That said you can find the best information in Jerry Sevick's (W2FMI) book 
>on baluns. My copy is titled "Transmission Line Transformers" and is a 
>wealth of information. It can be obtain at Amazon.com.
>
>73
>Danny, K6MHE
>

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