[Milsurplus] "Across The Pacific" PBS Documentary Premiers tonight! (North Carolina)

Kenneth G. Gordon kgordon2006 at frontier.com
Tue Jun 9 00:54:25 EDT 2020


On 8 Jun 2020 at 14:38, MICHAEL BITTNER wrote:

> Regarding the loop antenna, I see now that it amounts to a big, rectangular toroid. Theoretically,  it 
> should not be able to pickup or transmit anything as its magnetic field is confined within its 
> windings, In this case the wooden frame of the loop.  So, I'm still baffled as to how it worked.  What 
> am I missing?

Well, possibly, because the inherent inter-winding capacitance is being left out of the 
"equation". There was a very short statement within the documentary wherein the maker 
mentioned winding the loop such that it would be resonant at the frequency of interest.

Anyway, it, apparently, worked when he used it.

There is also the possibility that the movie-makers misunderstood what he was doing and 
THOUGHT he was winding all that wire around the arms of the loop, when, instead, he was 
winding it all around the periphery of the loop.

I would like to see his notes on it before I make any judgement.

BTW, I really thoroughly enjoyed the two hours of the documentary I watched today.

I can hardly wait to see the third hour.

Ken W7EKB


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