[Amps] how to wind an HF broadband 10:1 transformer

[Dan Sawyer]

Thanks for the reply,

I am experimenting reworking a Heathkit 104 (not A) front end. That 
front end had a reputation for being deaf. I believe it was due in large 
part to a gross impedance mismatch between the filters and the dual gate 
mosfet.

How does this relate to 'red' or 'yellow' and 47 or 61? I have red and 
yellow toroids. Experimenting with red seems to work on 40 meters, 
however it did not work well on higher frequencies. I do not have data 
handy for these materials.

I was pleased that the experiment worked well on 40.

Dan

jeremy-ca wrote:
> Iron powder #2 mix is most commonly used in broadband baluns between 
> an antenna tuner and open wire line.
>
> Carl
> KM1H
>
>
>
>
> ----- Original Message ----- From: "Dan Sawyer" <dansawyer at earthlink.net>
> To: "Amps" <Amps at contesting.com>
> Sent: Sunday, February 24, 2008 2:48 PM
> Subject: [Amps] how to wind an HF broadband 10:1 transformer
>
>
>> All,
>>
>> I would like to wind a broad band HF, 160 to 10, transformer.
>>
>> What core material is best for this range?
>>
>> Is the way to wind this a trifler winding (9:1) in an autotransformer
>> configuration?
>>
>> Thanks,
>>
>> Dan kb0qil
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>