[Amps] What am I missing....balun

John G3UUT amps at grebe.plus.com
Fri Feb 17 10:51:33 EST 2017


Oops! A clear case of engage brain before opening mouth, I'd forgotten 
about the square of the number of turns.

John G3UUT

On 17/02/2017 14:48, Joe Subich, W4TV wrote:
>
> Your numbers don't add up.  Impedance increases by the square of
> the number of turns but only linearly by the number of cores:
> 14^2 (196) >> 2^2*6 (24)
>
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 2/17/2017 9:35 AM, John G3UUT wrote:
>> Hang on a minute, lets think about this. I built a balun using one of
>> these cores or similar and needed 14 turns to get sufficient loss on 1.8
>> MHz.  This one has 2 turns but has 6 cores so it may not be far off.
>>
>> 73 John G3UUT
>>
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