[AMRadio]


Brett gazdzinski brett.gazdzinski at verizonbusiness.com
Thu Jan 25 22:10:37 EST 2007


We are talking about the same thing.
But the link that drives the coil that feeds the
open wire line has ground on one side, rf on the 
other side.
So one side of the coil to the open wire line would
get more RF, no?

Brett
 

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of A.R.S. - W5AMI
> Sent: Thursday, January 25, 2007 9:58 PM
> To: Discussion of AM Radio in the Amateur Service
> Subject: Re: [AMRadio]
> 
> Well, it is supposed to be a balanced to un-balanced match.  The open
> wire feeders are tapped on equal turns of the main coil as the
> balanced side and "converted" to unbalanced via the link coil.  Maybe
> we are talking about two different things Brett.  My old mind doesn't
> work like it used to...
> 
> 73
> Brian
> 
> 
> On 1/25/07, Brett gazdzinski 
> <brett.gazdzinski at verizonbusiness.com> wrote:
> > Yes, but you would think if you really wanted it
> > balanced, the rf would go to the center of the link,
> > then say 4 turns each side to ground.
> >
> > Almost all the tuners are built with one link,
> > and one side is ground, the other hot, and it works
> > it seems...
> >
> > Brett
> > N2DTS
> >
> >
> > > -----Original Message-----
> > > From: amradio-bounces at mailman.qth.net
> > > [mailto:amradio-bounces at mailman.qth.net] On Behalf Of 
> A.R.S. - W5AMI
> > > Sent: Thursday, January 25, 2007 9:20 PM
> > > To: Discussion of AM Radio in the Amateur Service
> > > Subject: Re: [AMRadio]
> > >
> > > On 1/25/07, Brett gazdzinski
> > > <brett.gazdzinski at verizonbusiness.com> wrote:
> > > >
> > > > Odd on these balanced tuners that some types have the link
> > > > unbalanced, that is, there is ground side and a hot side
> > > > in the center of the balanced coil, where you could make
> > > > 2 separate links in parallel or something, with the centers
> > > > to the rf and the outsides to ground.
> > >
> > > Brett,
> > >
> > > My homebrew balanced link tuner is this way.  The link 
> connects to the
> > > 50ohm coax.  One side goes to the shield and one to the 
> center (hot).
> > > Others use a variable cap with the link.  Mine rotates 
> within the main
> > > coil for loading.
> > >
> > > 73
> > > Brian / w5ami
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> 
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