Iain
I made a fast visit to the YU7EF and yes is not the step by step site to build
your first yagi, but for people with the idea
how the antenna can be build,
I can say the web page put you the facts and what you need, the design is
50 or very close to 50 ohms no need or any other device
to adjust, ask for a insulated elements above or below the boom , maybe F12
style with PVC or Stauff clamps
for me is very clear how to use his designs and make it easy to replicate his
antennas even using imperial size tubing
and for support I follow the photos of the others what made it before.
give a try why not
J.Hector Garcia XE2K / AD6D
Mexicali B.C DM22fp / El Centro
P.O.Box 73
El Centro CA 92244-0073
http://xe2k.net
Tweeter @XE2K
________________________________
From: iain macdonnell - N6ML <ar@dseven.org>
To: "Joe Subich, W4TV" <lists@subich.com>
Cc: towertalk@contesting.com
Sent: Thursday, August 8, 2013 10:54 AM
Subject: Re: [TowerTalk] hairpin matches
Speaking of YU7EF; I've been to his site several times in the last
couple of months, and I always fail to find any description of his
construction methods. I find tables with element spacing numbers,
plots and photos, but no construction details. I must be missing an
obvious link somewhere.... ??
73,
~iain / N6ML
On Thu, Aug 8, 2013 at 10:44 AM, Joe Subich, W4TV <lists@subich.com> wrote:
>
> The Hy-Gain "clamshell" element mounting is very difficult to use on
> six meters as the feedpoint connection fans out by at least 4".
>
> I agree with Hector ... scrap the Hy-Gain boom to element mounts and
> start with a clean design based on insulated elements above or below
> the boom. In addition to G0KSC's designs, those by Pop, YU7EF are
> well recommended, have been built by many and are solid performers.
> See: http://www.yu7ef.com/ - the EF606 would work very well on the
> Hy-Gain 24' boom and offers a direct 50 Ohm feed.
>
> 73,
>
> ... Joe, W4TV
>
>
>
> On 8/8/2013 1:10 PM, Hector Garcia XE2K wrote:
>>
>> Robert
>> Will recommend if you go for other design that have no need for a matching
>> device like the gamma, beta , delta, testa or the Hair pin
>>
>> I got excellent results compared to commercial in production antennas
>> making my own 6m and 10m yagis with GØKSC designs
>> Will say that several model of LFA can fit in your boom , OWL or a OWA,
>> direct feed to 50 ohms and low noise antennas
>>
>> Check the page and get a new proved design and not one made with a
>> calculator and with uncertain gain and performance
>> Give a try
>>
>> http://www.g0ksc.co.uk/
>>
>>
>> Just one happy "Customer" of Justin's work to the hams
>>
>> J.Hector Garcia XE2K / AD6D
>> Mexicali B.C DM22fp / El Centro
>> P.O.Box 73
>> El Centro CA 92244-0073
>> http://xe2k.net
>> Tweeter @XE2K
>>
>>
>>
>>
>> ________________________________
>> From: r miles <greenacres113@charter.net>
>> To: 6m <50mhz@mailman.qth.net>; antennas <antennas@mailman.qth.net>;
>> towertalk <towertalk@contesting.com>
>> Sent: Thursday, August 8, 2013 9:41 AM
>> Subject: [TowerTalk] hairpin matches
>>
>>
>>
>> I recently acquired a 5 el HyGain 10m monobander on a 24' boom. The yagi
>> uses a hairpin match. The plan is to convert it to 6m. Either a WVO special
>> on 19' of boom or use the full 24'. Since it's already in place we are
>> considering using the hairpin. Obvoiusly shorter as the freq is nearly
>> double 10m. My friend W4HLR will be actually doing the construction.
>> We would like to hear your experiences with HyGain hairpin matches on
>> monobanders. Or any monobander. Is there an advantage using a hairpin
>> rather than gamma or other methods. DX-Eng sells hairpins & say they are
>> better than gamma, etc.
>> We're hoping to end up with a heavy duty yagi as the boom & element
>> sizes of this yagi are bigger & heavier than most 6m yagis.
>> It will be for next seasons 6m Es. If there is one. Hi! Really was poor
>> this Summer in NW Tn.
>>
>> Tnx K9IL
>> _______________________________________________
>>
>>
>>
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