Re: [Bulk] Re: [TCML] Found a cap on ebay

[jhowson4@xxxxxxxxxxx]

Indeed you are correct, 

If you provide a few more parameters about your coil (primary inductance, frequency etc) I can plug it into my excel sheet and tell you exactly how much a MMC cap would cost. But aside from that I almost guarantee a rather large number. 
I have been stuck at the capacitor stage for months now, I eventually decided to remake my secondary coil which changed the frequency so I could use smaller caps, which would allow me to make my own using poly sheeting. Now I just need to actually get around to it. lol 



Thanks, 
John "Jay" Howson IV 


"Why thank you, I will be happy to take those electrons off your hands." 

----- Original Message -----
From: "drieben" <drieben@xxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Sunday, May 13, 2012 10:18:40 AM 
Subject: Re: [Bulk] Re: [TCML] Found a cap on ebay 

Hi Matthew, Michael, 

Although the CDE 942 series are GREAT for 
reasonably sized MMC banks for small to medium 
SG coil systems, their practicality really begins to wain 
for use in very large SG driven Tesla coil systems. 
IIRC, Michael is looking for around 140 nFd (.14 uFd) 
worth of pulse cap for his large 15 kVA pole pig driven 
coil. To obtain this total C while maintaining a safe 
ceiling voltage rating for a large 14.4 kV pig driven sys- 
tem would literally require multiple hundreds of these 
units, not to mention the time and labor involved in 
soldering and assembling them. At this level, it is 
typically more practical and economical to just use 
one (or a small number of) commercial pulse cap units. 

David Rieben 





----- Original Message ----- 
From: "Matthew Edwards" <matthew.n.edwards@xxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Sunday, May 13, 2012 1:03 AM 
Subject: [Bulk] Re: [TCML] Found a cap on ebay 


Go with the recommended CDE capacitors. You will not regret it. 

Matthew Edwards 

On May 12, 2012, at 9:25 PM, "MICHAEL HARDY" <mhardy4@xxxxxxxxx> wrote: 

> 0,15 µF/65 kV, MAXWELL HIGH VOLTAGE, PULSE CAPACITOR,cat. # 31435. He 
> wants $220 for it. Does anyone have info on this unit. Seems physically 
> small for this rating. May not hold up well? . Found some posts on pupman 
> that say 'size matters' 
> Re: Maxwell capacitor question 
> 
> Also maybe some useful spreadsheets. I know someone on the list once had a 
> maxwell spreadsheet listing many caps, this maybe it; 
> 
> Maxwell Capacitor Catalog pages 
> _______________________________________________ 
> Tesla mailing list 
> Tesla@xxxxxxxxxx 
> http://www.pupman.com/mailman/listinfo/tesla 
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