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From: collie@ubvmsd.cc.buffalo.edu (collie)
Newsgroups: sci.electronics
Subject: Re: Spark Coils
Summary: good luck
Keywords: HV
Message-ID: <30119@eerie.acsu.Buffalo.EDU>
Date: 7 Jul 90 04:24:40 GMT
References: <9007032018.AA27882@ucbvax.Berkeley.EDU>
Sender: news@acsu.Buffalo.EDU
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In article <2082@electro.com>, eric@electro.com (Eric) writes...

>Oil furnace transformers can apparently give 50kv sparks and up
>while car ignition types give 35kv.  To get some real sparks you
>need a Tesla coil.  To do this you need to make your own transformer
>on a carboard form with some hi-V insulation and an oscillator
>driving a high V high I primary winding with a very fast slope on
>the rising and falling edges.                       ^^^^^^^^^^ 
                ^^^^^^^^^^^^^

         Eric,is this a saw tooth oscillator ? I'm deeply intrested
 in HV power supply,and I have heard about those oil burner transformers
 from a friend.He said once a peepingtom used to bother his sister-in-law 
 so she told one of her other sister's husband about the problem,as 
 she was really afraid to go back to her house alone.

	The crazy (EE) nut took one of those transformer and wired it to the
 tom's favorite window,he took the secondary and attached it to a stake in the 
 ground under the window,soaking under the window well with water with the 
 other side attached to the screen.Then he sat in the dark with a big switch
 to send power to the primary (on command),while his sister-in-law is in the 
 house.
	The tom appeared on'que'at the window,and again trying too remove the
 screen,all of a sudden the brother-in-law throw the switch.The arc jumped
 across about sixteen inches,and hit the tom throwing him about ten feet from
 the window.Then he thought the tom was dead,since he layed there for a few
 good seconds without moving,but the good lord was with him.So he got and 
 staggered away never to return.

         People do some crazy things without thinking sometimes,he was lucky 
  the tom didn't die other wise big problems,but I guess he felt something
  had to be done as the cops did nothing.

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                                collie
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