[TowerTalk] [50mhz] hairpin matches

[Carl]

But the feed line system is pretty sloppy when it comes to keeping water out 
of the balun and feedline.

Elements are also flimsy. Using the 10M material would be much stronger and 
it can all be modeled, including the clamps, by various programs.

I dont know how the element dimensions/spacing compare to the older 66DX 
which had pretty poor F/B. Adding another element on the same 24' boom made 
a big improvement, I stacked a pair decades ago using the YO program.
But Mother Nature destroyed the elements after a few years.

Carl
KM1H



----- Original Message ----- 
From: "Steven Katz" <stevek at jmr.com>
To: "r miles" <greenacres113 at charter.net>; "6m" <50mhz at mailman.qth.net>; 
"antennas" <antennas at mailman.qth.net>; "towertalk" 
<towertalk at contesting.com>
Sent: Thursday, August 08, 2013 12:53 PM
Subject: Re: [50mhz] [TowerTalk] hairpin matches


> Why not just convert it to a VB-66DX (Hy-Gain's model for 6L 6m beam, 24' 
> boom)?
>
> It uses a "beta" match, which is a "T" match, plus a balun, and works very 
> well.  Essentially the same thing Telrex used several decades ago.
>
> Details are: http://www.hy-gain.com/pdffiles/VB-66DX.pdf
>
> WB2WIK
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of r 
> miles
> Sent: Thursday, August 08, 2013 9:42 AM
> To: 6m; antennas; towertalk
> 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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