Re: Off Shore MMC capacitor specimens (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Moderated and approved by: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Mon, 25 Dec 2006 11:04:10 -0700
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Off Shore MMC capacitor specimens (fwd)




The STKs do hold up well, even in commercial museum service.  I like the 
larger physical size of the Cornell Dubliers brand --- in most electronic 
applications more physical size equates to more surface area to help 
dissipate heat.  In capacitors it usually also implies better margins on the 
dielectric-foil edges where most failures tend to occur especially with RF 
duty.

I think another quarter or so buys good piece of mind.  It's worth it.

Dr. Resonance
>
> D. C. Cox used to sell STK Electronics MP89 double metallized 
> Polypropylene
> capacitors at prices cheaper than CDs.  He offered two values.  I think 
> one
> was 0.15 mF at 2 KV.  I bought some 0.1 mF 3 KV caps from him (more Joules
> per dollar) which I use in my MMC for coils that produce seven foot
> streamers. So far, they are holding up fine and stay cool to the touch.
>
> Perhaps he can let the list know if he still sells them.
>
> --Steve Young
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Saturday, December 23, 2006 9:05 PM
> To: tesla@xxxxxxxxxx
> Subject: Off Shore MMC capacitor specimens (fwd)
>
> Moderated and approved by: Gerry Reynolds <greynolds@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sat, 23 Dec 2006 17:11:44 -0800
> From: Jim Mora <jmora@xxxxxxxxxxx>
> To: 'Tesla list' <tesla@xxxxxxxxxx>
> Subject: Off Shore MMC capacitor specimens
>
> Hello All,
>
>
>
> I have received two different capacitors from off shore. They are both 
> .15uf
> and are meant to play the CD snubber role. I like the first specimen a bit
> more. I am looking for a volunteer to do testing and forensics on these. 
> The
> person should be well familiar with the CD caps and have test equipment to
> objectively test them to the point of failure. Then cut them open to see
> what gave out and construction techniques. I have specs for both types.
>
>
>
> It would be nice to have a suitable low cost alternative for the CD's
> perhaps for less than mission critical construction projects. They both 
> seem
> very well made with similar dimensions and mongo leads. The first batch is
> oval which would allow greater PCB density.
>
>
>
> Thanks Much,
>
> Jim Mora
>
>
>
>
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