Re: [TCML] Maxwell #31915 colossal pulse caps

[FIFTYGUY@xxxxxxx]

In a message dated 8/14/08 6:13:48 P.M. Eastern Daylight Time,  
drieben@xxxxxxxxxxx writes:

>I am now the proud papa of 3 newly acquired Maxwell  #31915

>100 kV, .44 uF (that's right --  440 nF!) pulse caps with  one

>more on the way ;^)). 


    I wondered who was doing all the bidding on these!  Glad I didn't bid 
against you. I figured whoever was trying to get these was  looking for cheap 
replacements for some existing equipment.
    I tried looking up the specs as well, and couldn't  find any for this 
exact cap. So I took some very careful measurements on the  auction pic, and 
compared the ratios of the dimensions to the known height of  the standard 
terminal insulating assembly. I calculated the volume of the  things, and decided 
they had to be low-rep caps. 
    The price was good, but I need another big cap like  I need a hole in my 
head! :) Anyhow, I speculated that they *might* work OK as  TC primary caps, 
since they'd be running at a fifth of their rated voltage. But  another thing 
that bugged me was the low lifetime number of pulses - no telling  how much 
these puppies have seen, or how long they'd hold up at reduced  voltage but more 
severe-duty primary tank use. So I passed.
    One thing I thought they might be fun for would be  the "discharge a big 
cap through a streamer off a TC" trick. I believe they will  operate in the 
horizontal position, so they should be easy to charge at the base  of the 
secondary. 
    Glad they went to a good home, and glad to know  they went to a fellow 
TCML member. Sorta like "keeping them in the family". If  you ever want to get 
rid of one, lemme know!
 
-Phil LaBudde
Center for the Advanced Study of Ballistic  Improbabilities




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