Re: BC COMPONENTS/VISHAY pulse caps

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Illicium Verum <sebas@xxxxxxxxxxxxxxxx>

Hi Bob,
Yeah... Farnell is not the cheapest and to be honest I never heard of
the Geek caps before, is that a brand? But puls capacitors in
Thailand is a bit of a problem to get (my language skills are not that
perfect) ;)   Farnell delivered the next day, and I just have a small
NST 15KV 30mA, so for me its ok. NST's are cheap I paid for mine 38,85
USD. So on some things you safe money and others pay a littlebit more.
But compared to Sweden I safed a lot of money (more than half). The
dimensions of the capacitor are: Lenght 29mm, height 15mm (without legs),
thickness 6mm.

Best regards Sebas.

Thursday, June 16, 2005, 12:08:36 AM, you wrote:

> 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