[TCML] 4 MOT stack and balasting

["andrew" <andrew@xxxxxxxxxxxxxxxxxxxxx>]

Hi
Thanks for all the informative reples to "Advice on MMC" which have led to
some interesting side paths!!

Iv'e been in the garage tryin your suggestions ..

I have used ballast so I would not trip all the house breakers. As sugested
I ground off the welds on a spare MOT, shorted it's secondary and connected
it in series with the primary of my 4 mot transformer and varied the gap
between the I and E sections.  
With the I section completely removed I measured 17.3 Amps through the
primary of my transformer and ballast with my spark gap operating. (no Tank
primary circuit connected.)

I conquered my fears and used my Fluke digital meter to measure the short
circuit current of my 4 MOT transfomrer. 
With the balast the same as above I measured the short circuit current in
the secondary as 600 mA.

There was 86v measured accross the choke which means there would be 148 v
accross the primary of the transformer.

How should I apply these values to Javatc? It seems to be telling me that I
need a big .5 uF or larger cap and
a tiny little primary. As MMC caps are expensive, I was thinking of maybe 33
to 47nF perhaps with an 11 turn primary
is this not going to work?

Pondering Kiwi
Andrew

 
> Question:
> I assume when you say "My transformer is  4x MOT." you mean a stack of 
> 4 MOTs in series to output approximately 9kV open circuit?
> Another Question:
> Are you using, or planning to use, any external ballasting for the MOTs?
> And yet Another Question:
> Are you using, or planning to use, a Variac, or other variable 
> autotransformer to adjust the input voltage to the MOT stack?
>
> What you need to know:
> Open circuit voltage (measured is best) Short circuit current 
> (measured is best) If using external ballast measurements are made 
> with ballast in place Input that data into the boxes marked "Rated V 
> out" and "Rated mA"
> in the transformer design section of JavaTC
>
> Know that the MOT is not linear, and the impedance will change 
> depending on the applied voltage, so the result you get will only be 
> valid for the conditions you have used for inputs. If you are not 
> planning to use a Variac, it should be close enough. If you *are* 
> going to vary the input voltage you might want to measure your open 
> circuit voltage and short circuit current at different input levels 
> and recalculate to see if there are any gross anomalies that might 
> change the value you choose for a MMC capacitor.
>> When I know that, I can order my caps for the MMC.
> Yep
>>
>> Many thanks
>> Andrew Buxton
>> Newbie Kiwi Coiler
>>
>>
> later
> deano
 

__________ Information from ESET NOD32 Antivirus, version of virus signature
database 4752 (20100107) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com
 

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla