Re: High Voltage Pulse Capacitor
Posted by Bert Hickman on 7/10/2011, 7:59 pm, in reply to "High Voltage Pulse Capacitor"
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: I have 4 High Voltage Pulse Capacitors.
: I have no knowledge of these types of things!!!
: I am moving and found them in my garage...I am trying to get rid of them.
: How much are they worth?
: They have never been used.
: Still have plastic around the "Coil" on the top.
: Writing on them says:
: TKB 165
: .15 MFD
: 120 KVDC
: 50° cmax operating
: Any help would be appreciated!!!
The information I have suggests that these capacitors were originally made for the US government as part of the Distant Early Warning (DEW line) radar system in the latter half of the 1950's. The main contractor was Western Electric (part of AT&T), and these particular capacitors were likely manufactured by Cornell-Dubilier (now CDE, Inc.). See http://en.wikipedia.org/wiki/Distant_Early_Warning_Line for more information about the DEW line.
The original DEW line equipment was dismantled in the 1990's and some of the items and spares appeared on the surplus market. That may be where yours originally came from. Anyway, based on their age, these caps most likely use an oil-paper dielectric system. They would work as high voltage DC filter capacitors and in low duty cycle pulsed applications, such as DC X-ray power supplies, Marx generators, HV voltage multipliers, and in pulse forming networks (PFN's). They would not be suitable for direct radio frequency (i.e., Tesla Coil tank circuit) applications.
Unfortunately, it's also quite likely that each capacitor uses PCB's as a dielectric fluid. PCB's were banned in new electrical equipment (including capacitors) in the late 1970's since they were found to be a long-lasting environmental hazard. It might be possible to locate a high voltage enthusiast who might be willing to take these off your hands. If not, you will need to locate a licensed disposal firm to safely dispose of these for you. I might be able to put you in contact with someone in your area - in what part of the US are you located?
Good luck and best wishes,