Re: [TCML] Minimum number of MMC strings?

[Adam Karvonen <adam.karvonen@xxxxxxxxx>]

In order to keep costs down, I decided to use
these<http://www.digikey.com/product-detail/en/B32023A3154M/495-3802-ND/1648119>capacitors
instead. Will one string of these capacitors be able to handle
the current in a tesla coil with a 270 watt NST?


On Sun, Aug 11, 2013 at 12:49 PM, <zimtesla@xxxxxxxxxxx> wrote:

> My experience with a TC running a 30mA NST is that one string of CDC 942C
> caps giving 0.009 uF works well and allows me to get 30" sparks from time
> to time.
>
> The discussion about multiple strings had to do with higher power coils.
> Jim Zimmerschied
>
> snip
>
> I am in the process of designing my first tesla coil. It uses a 9 kv 30 ma
> NST, which gives a LTR cap size of about 0.0133 uf tank cap. While
> designing the MMC, I have come across conflicting advice on MMC design. On
> this
> tesla coil design
>
> guide<http://www.tiagoespinha.**net/wp-content/uploads/2009/**
> 07/259168-Tesla-Coil-**Construction-Plans.pdf<http://www.tiagoespinha.net/wp-content/uploads/2009/07/259168-Tesla-Coil-Construction-Plans.pdf>
>  >,
> the author writes that  "You should always have at least 5 strings in
> parallel (increase string length if necessary),
> because each string has to deliver huge currents. If you have multiple
> strings in series,
> each string will have to contribute less current and it will last longer
> than if you have just
> one string (which would blast in an instant.)"
>
> However, I have seen plenty of MMCs with just 1 or 2 strings. For example,
> there is this <http://www.tb3.com/tesla/**capacitors/capacitors.html<http://www.tb3.com/tesla/capacitors/capacitors.html>
>  >,
> this<http://www.halice.com/**physics/4coil.html<http://www.halice.com/physics/4coil.html>
>  >and
> this <http://www.derivedlogic.com/**TeslaCoil/TeslaCoil.html<http://www.derivedlogic.com/TeslaCoil/TeslaCoil.html> >.
> How many MMC
> strings would I need for my 270 watt transformer? I would prefer to use
> fewer strings to save money.
> ______________________________**_________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/**listinfo/tesla<http://www.pupman.com/mailman/listinfo/tesla>
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla