[Amps] (no subject)

[jeremy-ca]

Ive used similar sized caps at about 1/2 to 2/3 of their voltage in generic 
FW and also doubler supplies with no sign of heating. These were fairly 
popular 10-20 years ago for home brew and reports were that they invariably 
failed when pushed much higher.

I wasnt about to doubt the reports and generate an explosion to verify.

Carl
KM1H

----- Original Message ----- 
From: "Dan Hearn" <dhearn at air-pipe.com>
To: "amps" <amps at contesting.com>; "Colin Lamb" <k7fm at teleport.com>
Sent: Tuesday, February 19, 2008 1:40 PM
Subject: Re: [Amps] (no subject)


>I should have given the physical size of the caps. They are 4 x 4 1/2 x 9 
>inches. They are much larger than the de-fib caps shown on the Aerovox 
>page. I think they came from some university lab surplus. Pulse Laser 
>maybe? I will probably have some of them at Puyallup hamfest.
>
> -----Original Message-----
> From: Colin Lamb [mailto:k7fm at teleport.com]
> Sent: Tuesday, February 19, 2008 9:50 AM
> To: Dan Hearn
> Subject: Re: [Amps] (no subject)
>
>
> Hi Dan:
>
> They are defib caps.  At least one manufacturer said they should not be 
> used at more than 2/3 of the rated voltage for continuous use.  Hams 
> regularly use them with those ratings.  I use a pair decades ago in a 
> voltage doubling circuit.  The voltage was 4 KV, divided among the two 
> caps.  The amp is still running flawlessly.
>
> 73,  Colin  K7FM
>
>
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