Re: Pulse Cap: Suitability for Tank Circuit?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com> 

Hi Matthew,

At 300pps, they should be able to handle a syncronous breakrate of 120pps
with no problem.  If they're holding charge they should be good.  If they
were used for radar, then the dielectric should be a good low loss one.  I
would put a safety gap across them due to the low voltage.  Be careful, they
might be PCB filled.

David E Weiss

 > Original poster: Matthew Smith <matt-at-kbc-dot-net.au>
 >
 > Hi All
 >
 > After trawling the archives here [this list] and general Googlin', I have
 > drawn a blank on my investigations into some capacitors that I have.
 >
 > The capacitors are ex-military (new old stock) Corsons, 2 x 1.5nF (series)
 > per can.  They are rated to 300pps.
 >
 > As these are only rated to 15kV, I thought it prudent to use each can with
 > the two capacitors in series to give me 30kV working.  Since I have a few,
 > I can parallel up to eight such arrays.
 >
 > The cans are of welded steel and I have absolutely no idea as to the
 > internal construction.
 >
 > 1) Does anyone know what type this may be and whether it can withstand the
 > voltage reversals of TC operation?  I realise that I have to keep below
300bps.
 > 2) These may be quite old, although they have never been used. (Spares for
 > radar installation?)  Other than checking the capacitance on my trusty
 > Wavetek and bringing them up to 15kV and seeing if they hold the charge
for
 > a reasonable time (electrostatic voltmeter for low loss), is there any way
 > that I can check that they're OK?
 >
 > Cheers
 >
 > M
 >
 > --
 > Matthew Smith
 > Kadina Business Consultancy
 > South Australia
 > http://www.kbc-dot-net.au
 >
 >
 >