[Boatanchors] Beam elements
Dave Reynolds
Dave at k6wrf.com
Wed May 13 01:35:08 EDT 2009
Hi ,
For what it's worth, if it were me I would buy or build a linear loaded
40m rotatable dipole. I have a Force-12 40m rotatable and I am perfectly
satisfied since I don't have room here for a 2 or 3 ele beam. The nice thing
about a linear loaded dipole is you can use a coupler "AKA" antenna tuner
and cover all of 40m. Good luck in your endever.
73
Dave K6WRF
----- Original Message -----
From: "RAY FRIESS" <rayfrijr at msn.com>
To: <k2gkk at hotmail.com>; "boatanchors" <boatanchors at mailman.qth.net>;
"FLBOATANCHORS" <flboatanchors at yahoogroups.com>; "glowbugs"
<glowbugs at piobaire.mines.uidaho.edu>
Sent: Tuesday, May 12, 2009 6:06 PM
Subject: Re: [Boatanchors] Beam elements
>
>
>
> 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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