[TowerTalk] Multiband antenna with non-resonant trap

[James Duffey]

That should be trap resonant frequency = SQRT(flow*fhigh), not trap = sort(floe*fhigh). I didn't check the autocorrect. Sorry - Duffey KK6MC

--
KK6MC
James Duffey
Cedar Crest NM





On May 26, 2013, at 2:37 PM, James Duffey <JamesDuffey at comcast.net> wrote:

> 
> Hans - Try:
> 
> "Designing Trap Antennas: A New Approach"  by Yardley Beers W0JF  Ham Radio August 1987"
> 
> He also had a couple of articles in QEX. A search on the ARRL periodical index should lead you to them.
> 
> You don't need the article though. The trap should be resonant at the geometric mean of the higher and lower frequency, . The antenna length should be what a dipole is at this geometric mean frequency and the traps should be in the center of each leg.
> 
> There are other variations where the trap is not in the center of each leg. I think the QEX articles discuss them. - Duffey  KK6MC  
> --
> KK6MC
> James Duffey
> Cedar Crest NM
> 
>> 
>