Topband: best core material?

[James Rodenkirch]

 Sorry - didn't make it crystal clear that this is a Delta shaped variant of a EWE antenna!!!!
 
My bad for not utilizing all of the necessary verbiage to make that clear....you see it in ON4UN's latest book on page 7-104.
 



> From: magoo at isp.ca
> To: rodenkirch_llc at msn.com
> Subject: Re: Topband: best core material?
> Date: Mon, 5 Aug 2013 14:00:48 -0400
> 
> A full-wave delta loop would have the transformation done with a 1/4 wave 
> line of 75 ohm cable. This must be something other than a full-wave loop?
> 
> Bill VE3NH
> ----- Original Message ----- 
> From: "James Rodenkirch" <rodenkirch_llc at msn.com>
> To: <topband at contesting.com>
> Sent: Monday, August 05, 2013 1:33 PM
> Subject: Topband: best core material?
> 
> 
> >
> > I have a schematic for a delta shaped loop that shows I'll need an 18:1 
> > transformer to transform the 950 ohms of the antenna to 50 ohms (feeding 
> > it with 50 ohm coax).
> >
> > One transformer diagram shows an FT-140-43 core being used.
> >
> > BUT, looking over some of Tom's, W8JI, write-ups, I see where he uses 73 
> > material instead.
> >
> > I see where 77 material replaced 73 material so -- is an FT-140-77 the mo 
> > betta way to go?
> >
> >
> > Thanks, in advance, for any advice/info.  Jim Rodenkirch K9JWV
> >
> >
> >
> > _________________
> > Topband Reflector
> >
> >
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> 
> 
> 
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