Re: High Voltage Transformer

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: NuclearFirestorm@xxxxxxx 

I'll be discharging into an electromagnetic railgun.

Thanks,
Matt

In a message dated 3/3/2005 6:47:05 PM Eastern Standard Time, "Tesla list" 
<tesla@xxxxxxxxxx> writes:

>Original poster: BunnyKiller <bunikllr@xxxxxxx>
>
>Okay...   thats more like it...
>
>a 10KVAC trannie will work well since you are rectifying the output. In
>fact you maynot have to go above 125VAC input into the trannie.
>
>If you use a 12KV 30mA neon sign trannie you wont need the 5Kohm resistor
>since the trannie is current limited ( it can take the so called short
>circuit current draw at initial charge of the empty cap)
>
>altho if a 12KV unit is used, DC output will be around 16KVDC  you may want
>to keep that variac below 90% output
>Ebay normally has several 12KV units available for around 20 - 50 $
>depending on whos selling ...
>
>A lighting supplier would carry them too but new prices are around 60 - 90
>$ depending on maker.    Check the phone book for Neon Sign makers/
>installer, they normally have a stash of used , broken, old trannies
>sitting in the back or somewhere....   talk to them with an intellegent
>mannerism and let them know of your experience and desire with Hi Volt
>usage...   you may get lucky and be given several units for free...
>
>BTW  what are you discharging the cap into?  flashlamp ? coil? H2O bomb?...
>
>
>Scot   D
>
>
>
>Tesla list wrote:
>
>>Original poster: NuclearFirestorm@xxxxxxx
>>The cap I'm charging is a 225 uF 15kV cap.  It will have a 5 MOhm energy
>>dissipation resistor, 500W 5 kOhm current limiting resistor, and a string
>>of balanced diodes to perform half-wave rectification.
>>The input power will come from a 110 input 0 to 130 Volt out variable
>>transformer.  The variable transformer is to be raised at a certain rate
>>to keep the power from being initially too high.   The circuit has been
>>designed and simulated in pSpice.  I believe the charge time was 20 or 30
>>seconds, I forgot the exact number.  The only missing part was a 
transformer.
>>
>>Thanks.
>
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