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

[ZR]

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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