Re: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE DUST

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I have used 10 in series/parallel for over a decade in 25 kVA use on a 10" coil and they are still fine. I bought them in at least four different "buys", so who knows the abuse they suffered before me, but they have performed admirably, as long as you use two in series.

Adam

________________________________
 From: MICHAEL HARDY <mhardy4@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> 
Sent: Saturday, May 12, 2012 11:15 PM
Subject: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE DUST
 
When I first decided to build a pig powered coil (2004 ), I searched for pulse caps on the internet, and of course the infamous 37667's were everywhere. Bought 5 at $100 each. Then found out they weren't very good for TC's. I've since been running 3  TC rated Maxwell 0.2uF, 20 kV caps in series, for 0.066uF @ 60kV. This on a 14.4 kV Pt powered 6" coil system running around 4800 watts with no problem. I have recently completed a 15" coil running at about 15 kW. I used 2 banks (including the one above)  in parallel for 0.14 uF at 60 kV. I still am running the smaller coil routinely. Changing out one bank is a pain, so decided to try a pair of 37667's in parallel (0.06 uF @ 35kV). Ran good with only slight warmth to cases of caps. Short 30 sec runs with 3 minute pauses. After a half hour I saw steam from the cap bank. Checked, and one of them had split open. DON'T BUY 37667 MAXWELL'S FOR TC USE!
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla