Re: dipole antenna efficiency

Posted by Kurt Pawlikowski on Jan 06, 2008; 2:32am
URL: http://elecraft.85.s1.nabble.com/dipole-antenna-efficiency-tp458071p458099.html

David,

    Actually, if you follow some of the other related articles Lloyd
wrote, the effect of this design seems to approximate a full wave dipole
with a device about 2% of a wave length. That is, a 40 meter antenna
about 3 feel long. He also purports a kind of "folded" antenna for 80
meters at about the same length. Wow. The possibility of a 6 foot long
160 meter antenna that works. I am definitely intrigued!

    Regards,

    kurtt

    Kurt Pawlikowski, AKA WB9FMC
    The Pinrod Corporation
    [hidden email]
    [phone]
    http://pinrod.com

David Cutter wrote:

> Ooops.  I must apologise for my mistake:  I've read the article in
> more detail and Lloyd is not feeding a small antenna, he is using the
> "feeder" as the antenna by deliberately unbalancing it with a terminal
> unit to obtain maximum current at the far end of the feeder.  
> Presumably this would then be elevated to a convenient point for
> maximum effect.
>
> David
> G3UNA
>
>> Here is an interesting antenna made by Lloyd Butler VK5BR.  It uses
>> open wire feeder to a VERY small antenna.
>>
>> http://users.tpg.com.au/users/ldbutler/ReverseFeedTopLoading.htm
>>
>> David
>> G3UNA
>>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com