[VHFcontesting] Portable 50 MHz beam antennas

[Zack Widup]

I got a design from VE3BFM for a four-element 6m beam on a 13 foot boom.
It's a great performer. Since I operate portable 95% of the time, I built a
version I could quickly assemble and disassemble at a portable site. The
boom and each element is in two pieces. I never formally wrote up an
article about how to build it, but I did talk about it at the VHF forum at
Dayton a couple years ago. Maybe I should write it up.

I have similar portable Yagis for 144 through 432 MHz. I can assemble and
disassemble them pretty quickly. My 144 MHz Yagi has six elements
wide-spaced on a 12 foot boom. I believe the gain predicted by Yagi
Optimizer is about 12 dBd. I haven't measured it yet.

73, Zack W9SZ


On Thu, Feb 15, 2018 at 8:23 AM, jon jones <n0jk at hotmail.com> wrote:

> Mark:
>
>
> Another idea is to build your own portable 6 meter beam. I have found a 2
> element yagi is easy to build, break down and re-assemble quickly. A 2
> element yagi offers about 3 - 4 dB gain over a dipole. It is easier to put
> up and take down than a 3 el.
>
>
> I use one for my VHF contest and portable operations. A picture of it is
> in the NCJ March/April 2016 pp. 32. It works... have WAC with it on 6 with
> 100 W from KS on ssb/cw.
>
>
> A plan for one is here:  http://www.qsl.net/k7yo/6m2Yagi.htm
>
>
>
>  - Jon N0JK
>
>
>
>
>
> ________________________________
>
> Hi:
>
> I finally took delivery of a suitable LiPo battery to facilitate "back
> pack portable" operation at the 50 to 100 watt level.   If any of my
> Canadian colleagues are interested I can provide the contact details for a
> Canadian distributor.
>
> At this point I'm planning on simply taking my 50 MHz three element beam
> apart and re assembling it on site.   In my view the beam I have isn't
> really intended for that type of use and I'm curious if anyone knows of any
> suppliers for small 50 MHz beams that break down and re assemble quickly
> and easily.   Google searching on my part didn't turn up anything that is
> currently in production.
>
> I'm hoping to shift my focus a bit this year and actually reach the true
> summit of at least one local mountain (vs simply driving most of the way up
> via logging roads.)  Having this ability would also have been useful
> earlier this year when I had to abort my CO81 visit during the sept
> contest.   In hindsight I suspect I could have activated the grid for a few
> hours on foot.
>
> 73
>
> Mark S
>
> Aligned Solutions Co.
> mark at alignedsolutions.com
> 604 762 4099
>
> ------------------------------
>
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