Originally posted by sido
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Pulse Induction History and Theory
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I thought I had posted this yesterday - did anybody see it? Can't find it today so here goes again.
This is the coil and sled made for the High Power Aquapulse. ABS pipe filled with special epoxy so that it is not bouyant. Nylon runners as wear surfaces. Demountable 42in coil. Planing device on cable ahead of the sled (not shown) which drives the cable down when towing so that the sled stays on the bottom.
Eric.
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This is the stage where a wire breaks off when you are not looking, and you can't see where it came from. Refurb on High Power PI going well and main pulse driver and sample generators functioning properly. TX pulse is 2mS wide. Delay adjustable between 150uS and 500uS as it is for large objects only. Seems strange to be resoldering joints that I last made in 1982.
Eric.
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Originally posted by Ferric Toes View PostThis is the stage where a wire breaks off when you are not looking, and you can't see where it came from. Refurb on High Power PI going well and main pulse driver and sample generators functioning properly. TX pulse is 2mS wide. Delay adjustable between 150uS and 500uS as it is for large objects only. Seems strange to be resoldering joints that I last made in 1982.
Eric.
[ATTACH]24992[/ATTACH]
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Originally posted by Baterista View PostIf it were possible, someday, make a reverse engineering of this device would be fantastic. I'm just dreaming a bit.
Eric.
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Originally posted by Ferric Toes View PostI would forward engineer it, as I already know how and why it works. A modern version using the latest devices and circuit techniques would be quite straightforward and be at least half the size and weight. You would still struggle with the power supply though; 40 - 50V at 5A. OK on a boat with marine batteries, although you do need a dedicated set to avoid alternator noise.
Eric.
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Originally posted by Ferric Toes View PostI thought I had posted this yesterday - did anybody see it? Can't find it today so here goes again.
This is the coil and sled made for the High Power Aquapulse. ABS pipe filled with special epoxy so that it is not bouyant. Nylon runners as wear surfaces. Demountable 42in coil. Planing device on cable ahead of the sled (not shown) which drives the cable down when towing so that the sled stays on the bottom.
Eric.
[ATTACH]24689[/ATTACH]
Hello, Eric, you have more information about this "monster coil". Inductance? maybe resistance?
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I stumbled upon a piece of history.
There was a brilliant fellow Klaus Fuchs that was deeply involved in development of nuclear bombs at a time, but he also published a paper: "The Conductivity of Thin Metal Films According to the Electron Theory of Metals," Proc. Camb. Phil. Soc. 34, 100 (January 1938 ) that I miss.
His formula was also reproduced in April 1938 issue of Wireless World, which I also don't have.
The formula is supposed to be something like this:
Where:
is the conductivity of the bulk material,
is the mean free path in the bulk
t is the film thickness
p is a specularity parameter
He was a very colourful person, and he is most famous for other activities. It is known that he:
- spied on British for Soviets
- spied on the US for British
- spied on US for Soviets
- was convicted of espionage in Great Britain in 1950
- was given maximum sentence of 14 years
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Никитин Н "В.К. Аркадьев Электромагнитные процессы в металлах, часть I-II, Электромагнитное поле" (1935-1937)
Nikitin of N "V.K. Arkadyev Electromagnetic processes in metals, Part I-II, the Electromagnetic field" (1935-1937)
Том 1.-2.
https://ufn.ru/ru/articles/1935/8/g/
https://ufn.ru/ru/articles/1937/1/e
https://www.translate.ru
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