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Does a capacitor charges smooth, or in stairs?
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jmelson:

--- Quote from: RoGeorge on June 07, 2020, 06:09:47 pm ---
--- Quote from: jmelson on June 07, 2020, 05:56:39 pm ---It had a bunch of He-3 detectors...

--- End quote ---

Did you say Helium 3?!   :o

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Yes, indeed.  And, right after the Pons/Fleishman disclosure, it was VERY hard to get He 3 detectors, the only company in the US that made them had a huge backlog.  My boss had to pull some strings to get a few.

Jon
jmelson:

--- Quote from: Nominal Animal on June 07, 2020, 06:38:02 pm ---

--- Quote from: jmelson on June 07, 2020, 05:56:39 pm ---I've also seen "capacitor quakes".
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What I'd like to know, is how long did it take to discover the culprit!

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Well, embarrassingly long, I'm afraid.  We were in a hurry to get some measurements, and just hooked it up and started counting.  But, we also hooked the signals up to a scope.  We expected to see signals all of about the same energy, but they were all over the place.  That should have been the clue.
Anyway, eventually, I had to go back and be methodical.  So, we hooked up the bias supply, WITHOUT the detectors.  All should be quiet, right?
But, no, we got the same pattern of pulses.  Then, we saw that they decreased in frequency, as time since bias was turned on increased.  Well, all we had in the circuit was a known clean bias supply, series resistors and coupling capacitors.  A quick look in the literature showed that pulses from high voltage ceramic capacitors was a fairly well-known phenomenon.  But, where are you going to get a .01 uF 3000 V cap EXCEPT ceramic?

Jon
EEEnthusiast:
Yes indeed it follows steps, when you measure it using any digital equipment. The voltage and currents are quantized by these measuring instruments.
When you use math,  an analog scope or analog meter, they follow an exponential decay.
T3sl4co1l:
Hah... I'd have gladly given you this one, if I had salvaged it about three decades earlier?... :-DD



Tim
Labrat101:

--- Quote from: StillTrying on June 07, 2020, 10:38:16 pm ---
--- Quote from: Labrat101 on June 07, 2020, 09:35:10 pm ---I am not knocking your work or the scope picture it was good .  :-+
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Knock all you like, it was just a 5 min. experiment. :)

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First you miss read   I said I was "NOT KNOCKING"

I spent 5 hours late at night running Tests to simulate theory .
I got a lot of interesting results . But when I have finished I will show the screen shots .
But at the moment my results are not showing what Prof said . I have got dam close.
 But I am not going to do the tests @ 200v so it has to be scaled down to give the same results.
our Prof in the video also mentioned the reflections .
  ('house insurance does not cover Against... 'Mad Scientists' )    >:D
      I have a good stock of Caps & Cables etc

Its been a many years  since I worked on transmission lines . so I want to see if this experiment
can be setup  as per his drawings . With different caps .

   
If one of you guys are Radio hams . You will be better equipped with transmission  :-+



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