Topband: Two 2:1 transformers to choose from!!

[James Rodenkirch]

I am focused on 160 and 80, Carl - sounds like more turns might be the better one to try first....
 
> From: zr at jeremy.mv.com
> To: mikewate at gmail.com; rodenkirch_llc at msn.com; topband at contesting.com; charlie-cunningham at nc.rr.com; jim at audiosystemsgroup.com
> Subject: Re: Topband: Two 2:1 transformers to choose from!!
> Date: Thu, 22 Aug 2013 15:02:42 -0400
> 
> It pretty much boils down to what frequencies you want to cover. To cover 
> down to the 600M band and below use more turns and to go up to 30 or 20M the 
> 2-3T at 50-75 Ohms does well.
> 
> I use a VNA and 73-202 transformers to tweak what I want and the effect of 
> interwinding capacitance can also be seen.
> 
> Im also installing a few new reversibles for LF using more turns.
> 
> Carl
> KM1H
> 
> 
>  ----- Original Message ----- 
> From: "Mike Waters" <mikewate at gmail.com>
> To: "James Rodenkirch" <rodenkirch_llc at msn.com>; "topband" 
> <topband at contesting.com>
> Sent: Thursday, August 22, 2013 11:21 AM
> Subject: Re: Topband: Two 2:1 transformers to choose from!!
> 
> 
> > P. 7-69 of Low Band Dxing (5th ed.) by ON4UN says a maximum of 4 turns on
> > the low-Z primary for binocular cores. It might work, but there are other
> > turns ratios you might try.
> >
> > Here is a list of turns ratios for those cores I made:
> > http://www.w0btu.com/Binocular_core_turns_ratios.pdf
> > If you get a 500 Server Error message, contact me directly and I'll e-mail
> > it to you.
> >
> > 73, Mike
> > www.w0btu.com
> >
> > On Wed, Aug 21, 2013 at 3:49 PM, James Rodenkirch 
> > <rodenkirch_llc at msn.com>wrote:
> >
> >> I received enuff "info" and thoughts to know I'll utilize the 5:7 winding
> >> version.
> >>
> > _________________
> > Topband Reflector
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