[Amps] HV lytic max V ratings..some notes

[Carl]

What is the date on that?  It sounds ancient and harking back to the days of 
65* C caps as the norm.

Carl
KM1H


----- Original Message ----- 
From: "David Cutter" <d.cutter at ntlworld.com>
To: "Jim Thomson" <Jim.thom at telus.net>; <amps at contesting.com>
Sent: Monday, April 12, 2010 7:09 PM
Subject: Re: [Amps] HV lytic max V ratings..some notes


> Download yourself a copy of MIL HDBK 217F and look at the section on
> aluminium electrolytic capacitors.  There's a nice calculation for MTBF 
> and
> it is influenced by, amongst other things, voltage and temperature.
> Anything above about 60% rated voltage and 40C ambient will begin to
> seriously reduce the life expectancy.  I don't have it in front of me, but
> you can pick any component you like to do the sums.
>
> The M stands for mean, it's not an absolute, it's a statistical 
> prediction.
> It has been said that most aircraft probably shouldn't get off the ground,
> but then neither should the bumble bee.
>
> David
> G3UNA
>
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