BC COMPONENTS/VISHAY pulse caps was :microwave oven caps

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi Sebastiaan,

Looks like 1USD/.034J or 29USD/J.
For a given bang size, three times the price of geek caps!!!
So they look like an expensive option.

Don't know if you could push the operating voltage more than the geek types
or if they have a higher rms current rating.
I would expect the later to be true if their smaller than geek caps but
similar construction.
What are their dimensions?

Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, June 15, 2005 12:27 AM
Subject: Re[2]: Microwave capacitors


Original poster: Illicium Verum <sebas@xxxxxxxxxxxxxxxx>

Hello Bob,
The capacitors I'm working with are;

_____________________________________________________________________

Brand: BC COMPONENTS/VISHAY
Type: AC and pulse metallized polypropylene film capacitors
Model: KP/MKP 2222 375
Applications: Where high currents and steep pulses occur.
Material: Radial Epoxy Lacquered Type
Dielectric: Polypropylene film
Electrodes: Metallized film and aluminum foil
Coating: Flame retardant epoxy material (UL-class 94 V-0)
Performance Grade: Grade 1 (long life)
Stabillity Grade: Grade 2
Climatic Category: 55/105/56
Operating Temperature: From -40°C to +85°C
Maximum application temperature: 105 °C
Capacitance tolerance: 5%
Rated voltage: 450AC or 1000DC
Rated value: 68nF
Voltage rise/fall time: 3300Vµs
Tangent of loss angle: At 10 kHz  =  <6 × 10-4
Tangent of loss angle: At 100 kHz = <15 × 10-4
R between leads: At 500 V, 1 minute >100000 MOhm
R between interconnected leads and case: 500 V, 1 minute >100000 MOhm
Ionization (AC) voltage: (typical value) at 50 pC peak discharge >500 V
Withstanding (DC) voltage: (cut off current 10 mA), rise time 100 V/s:
1200 V, 1 minute
Withstanding (DC) voltage between leads and case: 2840 V, 1 minute
Pitch = 27.5 mm
_____________________________________________________________________

The price I paid for 275 capacitors was;
Euro 222,75
USD  264

Quantity        List Price
1 - 49          Euro 1,10    USD 1,30
50 - 99         Euro 0,99    USD 1,17
100 - 499       Euro 0,81    USD 0,96
500 - 999       Euro 0,64    USD 0,76
1,000 - 2,999   Euro 0,57    USD 0,67
3,000 and above Euro 0,43    USD 0,51

All prices before tax!

I placed 5 strings of 55 capacitors 400 VAC in series.
Each string is 22000 Volt AC and 1.236 nF
5 strings in parallel givs a 6.18 nF, 181500 Vµs Primary capacitor.

They can be both at http://www.farnell.com an international
organisation who delivers allmost anywhere on the world.

It toulk me some time to copy and paste and convert curencies etc etc,
but.... I hope this will cover all the information you need ;)
Feel free to ask for more details :D

Best regards,
Sebastiaan


Wednesday, June 15, 2005, 10:52:47 AM, you wrote:

 > Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

 > Hi,

 > I am curious about your caps as they have a similar dV/dt rating to geek
 > caps (from memory)
 > They cost about 10USD/Joule though apparently you can push them to
 > 5USD/Joule.

 > What's the cap value, cost and rms current rating of your pulse caps?

 > Robert (R. A.) Jones
 > A1 Accounting, Inc., Fl
 > 407 649 6400
 > ----- Original Message -----
 > From: "Tesla list" <tesla@xxxxxxxxxx>
 > To: <tesla@xxxxxxxxxx>
 > Sent: Tuesday, June 14, 2005 5:45 PM
 > Subject: Microwave capacitors


 > Original poster: Illicium Verum <sebas@xxxxxxxxxxxxxxxx>

 > Hello Chris,
 > 200 dollars is a lot, if you would have asked on the list.... I can
 > buy them here in Thailand for 1,82 USD each, buying ten plus shipping
 > would have saved you some money. You can use them for a power factor
 > corection, but as a primary capacitor they won't do well. I use high
 > speed 450VAC pulse capacitors with a speed of 3300 Vµs. The speed
 > 3300 Vµs does not mean that the capacitor is made to handle 3300 Volt.
 > It only indicates how fast a capacitor can be charged and discharged.
 > In this case the capacitor is rated at 1000 Volt DC and can charge and
 > discharge itself 3.3 times in 1 µs. The speed of the capacitor is
 > related to the time it takes the Tesla coil to produce a spark and
 > should therefore be as high as possible.





--
Best regards,
Sebastiaan