[pure-silver] Re: Speedotron 2401A

Frank Filippone wrote: 
Are you sure the capacitors you learned about in 1955 were electrolytics and 
not Leyden jar devices?  It was early in EE education
and training, after all.

For those NOT EE's......

http://www.alaska.net/~natnkell/leyden.htm


Frank Filippone
red735i@xxxxxxxxxxxxx 



Leyden jars can be pretty dangerous if you don't know what they are.

I used to be into ham radio and built a power supply for a linear amplifier. The transformer and filter cap came from a TV broadcast studio and the cap was an oil filled cap, about 20 microfarads and rated to about 10 kv. It powered a set of four 813 tubes and I estimate it gave about 4 or 5 Kw input to the plates. The plates in an 813 were made of graphite and sometimes glowed red. I never used the four tubes but removed two of the tubes.

When I first built it I did not put in a bleeder resistor and when I turned it off the first time I did not use it for about a week. When I came back there was a very substantial charge left on the cap. Oil filled caps don't leak worth a darn.

Don't fool around with capacitors. They can be lethal.

Bert
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