[Prev][Next][Index][Thread]

Re: Halloween night, CP cap {con,de}struction



It's strange about Condenser Products.  They have been friendly towards
the amateur coiler, but based on the results that I and others have had,
perhaps they should have done a bit more testing.  What is your break rate
that you fire at?  Do you use a rotary gap?  How much did you pay for
yours?  :-)

Chip

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 Chip Atkinson 
 http://www.pupman-dot-com 
 --- If I can't fix it, I can fix it so it can't be fixed --
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

On Mon, 2 Nov 1998, Tesla List wrote:

> Original Poster: "B**2" <bensonbd-at-erols-dot-com> 
> 
> Hi Chip,
>     A well designed RF capacitor should take hot spotting into the design
> consideration.  I am beginning to wonder about that company.  My capacitors
> are 0.01 uF at 30 kV DC, BD300-103B, made by Plastic Capacitors Inc.  I
> ordered these 20 years ago.  I asked for polypropylene in oil with extended
> foil construction.  The salesman suggested RF induction heater capacitors.
> He said that they run all day for an 8 hour shift at 300 kHz in induction
> heaters.  I have never run them above 10 kV.  In one run I ran for about
> 1/2 hour making 5 foot streamers until the 1/8 inch tungsten rods in the
> rotary burned down past the firing distance.  The capacitors were cold as
> ice water.  They are in a metal can with one insulated electrode coming
out.  
> 
> Barry
> 
> -----Original Message-----
> From: Tesla List +ADw-tesla+AEA-pupman-dot-com+AD4-
> To: tesla+AEA-pupman-dot-com +ADw-tesla+AEA-pupman-dot-com+AD4-
> Date: Sunday, November 01, 1998 7:51 PM
> Subject: Re: Halloween night, CP cap +AHs-con,de+AH0-struction
> 
> 
> Original Poster: Chip Atkinson +ADw-chip+AEA-pupman-dot-com+AD4- 
> 
> Barry,
> 
> The safety gap is set at about 1/2+ACI-,  1/32+ACI-.  I had the voltage
turned
> up just to where it wasn't firing at all, probably around 11KV.  
> 
> Personally I suspect that the problem was due to +ACI-hot spots+ACI-
> developing in
> the caps.  Once the cap shorts out, it's all over because there is very
> little room for expansion of the contents.
> 
> Chip
> 
> 
> On Sun, 1 Nov 1998, Tesla List wrote:
> 
> +AD4- Original Poster: +ACI-B+ACoAKg-2+ACI-
+ADw-bensonbd+AEA-erols-dot-com+AD4- 
> +AD4- 
> +AD4- Hi Chip,
> +AD4-     Sorry to hear about the demise of your capacitors.  Did the
> safety gap
> +AD4- across the capacitors ever fire during any of these runs?
> +AD4- 
> +AD4- Barry
> +AD4- 
> +AD4- -----Original Message-----
> +AD4- From: Tesla List +ADw-tesla+AEA-pupman-dot-com+AD4-
> +AD4- To: tesla+AEA-pupman-dot-com +ADw-tesla+AEA-pupman-dot-com+AD4-
> +AD4- Date: Sunday, November 01, 1998 1:29 AM
> +AD4- Subject: Halloween night, CP cap +AHs-con,de+AH0-struction
> +ADw-SNIP+AD4-
> 
> 
> 
>