[Boatanchors] Beam elements

[RAY FRIESS]

Thanks.

 

I am toying with a idea.  I have the traps that were made to add 40 meters to the driven element of my triband beam.

I never put the on because I thought it would be too unwieldly for my location, and I didnt want to add the extra guying that is usually added to the driven element.

 

I was looking at them the other day and thought using them to construct a rotatable dipole for 40 meters might be worth experimenting with.  That's why I wondered what the electrical wavelength of a triband beam element usually is.

 

I was thinking that since the next band down from 20 meters, as far as the driven element of a tribander is concerned, is 15 meters, that if I made a 20 meter half wave antenna out of tubing or wire, and used these traps that maybe I could get the homebrew antenna to resonate on 40 meters, as it would do if I put them on the driven element of the tribander like they would do if I added them to the beam.

 

If so, I could manage such a rotatable dipole, where it would be too unwieldly to add them to my tribander.

 

What do you antenna experts here think?

 

Ray  WA7ITZ


 
> From: k2gkk at hotmail.com
> To: rayfrijr at msn.com; boatanchors at mailman.qth.net; flboatanchors at yahoogroups.com; glowbugs at piobaire.mines.uidaho.edu
> Date: Tue, 12 May 2009 19:50:11 -0500
> Subject: Re: [Boatanchors] Beam elements
> 
> 
> Half wave, but shortened a bit by the coils in the traps.
> 
> 
> 
> 73 - Mac, K2GKK/5
> 
> 
> 
> 
> 
> > From: rayfrijr at msn.com
> > To: boatanchors at mailman.qth.net; flboatanchors at yahoogroups.com; glowbugs at piobaire.mines.uidaho.edu
> > Date: Tue, 12 May 2009 18:48:43 -0600
> > Subject: [Boatanchors] Beam elements
> > 
> > 
> > 
> > 
> > I'm wondering if someone here can answer a question for me?
> > 
> > 
> > 
> > Tri-band beams ... are the elements usually electrically a quarter wave, half wave, or full wavelengths with the coils?
> > 
> > 
> > 
> > Ray WA7ITZ
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