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Unread 30-12-2006, 01:21
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Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
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Re: What to do with big capacitors?

Doug,
The gell used with defib actually decreases the localized current peaks to prevent burning by insuring that the current is spread out over the entire area of the paddle for much the same reason we are talking about. The skin resistance varies drastically over different areas and under different conditions. I am not sure what you are referring to with the "skin effect" vs. frequency. High frequency currents tend to move on the "skin" of a conductor but this has little to do with the effect on a body coming in contact with a high frequency voltage. RF burns are real and occur at relatively low voltages. I have some scars to prove that.
The big cap you have likely came from a high voltage power supply. I have seen these in old industrial strength microwave ovens, TWT amplifiers, transmitter power supplies and old style TV projection devices. Handle this one with care as it is oil filled and likely contains PCB if it was manufactured in the 60's or 70's.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.