Fw: Re: The use of a doublet

[WILLIS COOKE]

 I count three coils in the single
 coil Z Match.  Also there is a hard to find two section
 variable capacitor.  One of the coild has two
 taps.  This is probably the reason that it has not been
 used in commercial matching networks recently.
 
 Willis 'Cookie' Cooke
 K5EWJ
 
 

> --- On Wed, 7/15/09, [hidden email]
> <[hidden email]>
> wrote:
>
> > From: [hidden email]
> <[hidden email]>
> > Subject: Re: [Elecraft] The use of a doublet
> > To: "Ron D'Eau Claire" <[hidden email]>,
> "'Phil LaMarche'" <[hidden email]>,
> [hidden email],
> "'.hank.'" <[hidden email]>
> > Cc: "'Elecraft_List'" <[hidden email]>
> > Date: Wednesday, July 15, 2009, 7:17 AM
> > That should be VK5BR Lloyd Butler
> >
> > http://users.tpg.com.au/users/ldbutler/SingleCoilZMatch.htm
> >
> > David
> > G3UNA
> >
> > ---- [hidden email]
> > wrote:
> > > Can anyone point to why the single coil Z match
> wasn't
> > commercialised rather than the T match?  (Perhaps
> it's
> > a historical thing and manufacturers just copy each
> other,
> > notwithstanding the Johnson Matchbox of course, which
> is no
> > longer produced.)
> > >
> > > I'm in process of building one to cover 160 to 10
> from
> > VK2BR (?).  I'm hoping that the link coupling will
> help
> > with "balanced" feeders and antennas, though one side
> is
> > bound to have more capacitance to earth than the
> other, so
> > "balanced" is fairly relative.
> > >
> > > David
> > > G3UNA
> > >
> >
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