[Milsurplus] Triad Choke

[J. Forster]

Decades ago, I spent some time designing 400 Hz and inverter transformers.
One of the oddest things was a demagnetizer/bulk eraser for mag taper.

Best,

-John

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> John, OM:
> Yes indeed the results are not perfect, but very useful.
> Once-upon-a-time, a long time ago, (my first real job) I designed
> transformers, reactors, rectifier transformers, burdens, etc, and it was
> fun.  They were much larger than the ones we play with, but the
> principles are the same. I used bakelite spacers in the air gap for fear
> that the iron would crush paper as the magnetic circuit tried to
> close...
>
> I once tried a true rms reading meter with strange results.  The moral
> is trust your meter if you understand it...
>
> Richard, AA1P
>
> On Mon, 2010-12-27 at 11:05 -0800, J. Forster wrote:
>> Hi Richard,
>>
>> Swinging chokes are hard to design and do vary quite a bit due to air
>> gap
>> tolerances. One also has to take into account the compliance of the gap
>> spacer as the forces can be very large.
>>
>> On your previous post, it's a clever measurement technique. The results
>> are not perfect, but it should give good approximate results, especially
>> for unknown choke designs.
>>
>> Thanks,
>>
>> -John
>>
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