[VHFcontesting] Portable 50 MHz beam antennas

[Bob K0NR - email list]

Zack,

I'd be interested in the 144 MHz yagi design for backpack portable 
operating.
Its got to be compact and easy to assemble, otherwise it tends to get 
left at home.
For me, compact is nothing longer than 40 inches.
(I'm actually thinking SOTA more than VHF contesting but I sometimes 
combine the two.)

73, Bob K0NR

On 15-Feb-18 7:57 AM, Zack Widup wrote:
> 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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-- 

--
Bob Witte K0NR
bob at k0nr.com