Re: MMC Design UK Bulk Order

• To: tesla-at-pupman-dot-com
• Subject: Re: MMC Design UK Bulk Order
• From: wwl-at-netcomuk.co.uk (Mike Harrison) (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 01 Jul 1999 11:37:24 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

On Wed, 30 Jun 1999 04:22:19 -0600, you wrote:

>Original Poster: Alan Sharp <AlanSharp-at-compuserve-dot-com> 
>
>Dave,
>>11 x 1600V 47nF caps in series
>>with 4 strings in parelel.  10Mohm resistors across each cap for safety.
>
>11 in series for 10kV AC should be fairly bullet proof
>
>>I intend to use Philips 378 or 376 series caps, from farnell.<
>
>I've been doing some tests with the Axial 47nF, 1500V from LCR
>from Farnell its 5+ 46p, 25+ 0.40p 100+ 0.35p
>dv/dt 2000V/uS. A string of 4 alongside my 0.067uF cap withstood
>8kV AC.
>
>The philips 376 would be ideal - dv/dt 10000 V/uS
>but the value we want isn't there - closest is 47nF at 1000V 54p 100+

>philips 378 series 47nF 1600V        dV/dt 900 V/uS
>100+ 53p,
>I would go for the 22nF 1600V  dV/dt 1600 V/uS that dV/dt has to
>be doubled in comparison to the 47nF (twice as many strings)
>100+ 33p
.. sorry, what value isn't there.  Remember that Farnell don't carry
all the Philips range. 
My 1996 Philips passives catalogue shows 376 in the following (all in
E12 increments) : 
1kv 4n7-180n, 1600v 1n8-56n, 2KV 1n-33n (but all these 'non-preferred'
whatever that means)
and 378 in : 
1KV 3n3-220n, 1.6KV 5n6-100n, 2KV 3n3-47n, and 2.5KV 2n2-27n (only the
2.5KV are 'non-preferred')

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