Re: Another first coil story

Subject:     Re: Another first coil story
      Date:  Fri, 06 Jun 1997 08:26:02 EDT
      From:  wb8jkr-at-juno-dot-com (Mark S Graalman)
        To:  tesla-at-pupman-dot-com
References:  1

   Matt, right off the bat I would suggest doubling the number of .020"
spark gaps.


Mark Graalman
Toledo, Ohio
Callsign: WB8JKR
Member: Society of Telecomunications Engineers
TCBA member # 1399

On Thu, 05 Jun 1997 22:18:01 -0500 Tesla List <tesla-at-pupman-dot-com> writes:
>Subject:  Another first coil story
>  Date:   Wed, 4 Jun 1997 22:02:55, -0500
>  From:   RSNV02D-at-prodigy-dot-com ( MATT MCARTHUR)
>    To:   tesla-at-pupman-dot-com
>Hello All,
>I have been silently watching this list for a month or so now and I
>just completed my first coil.  I am having a few problems with it 
>though.  The main thing is that I am only getting a weak little 
>6" (thats inch) spark, if that.  As far as I can tell I have achieved 
>I think, since I only get the 6" spark when the primary is in the 
>perfect spot (tuned).
>  The setup I have is a 10KV 23mA OBIT tranny, 5  1.2nF salt water
>beer bottle caps ( I built a plate glass cap but roasted it due to 
>design) 2 series gaps with .020 inches gap each.  My primary is made 
>out of 1/4 inch copper tubing, 7" diameter, 5" tall. The secondary is 
>3 1/2" PVC pipe, approx 12 1/4" long with about 500 windings of .025" 
>enameled wire. The output terminal is pretty cheap, it is a 60 watt 
>light bulb (5" in diameter) covered with aluminum foil.
>  The best guess I have to the wimpy sparks is bad coupling. The 
>secondary sits about one inch from the BOTTOM of the primary.  I had 
>just read a post that said something about the secondary for lower 
>coils being 1 1/2" ABOVE the primary to enhance the coupling.
>  Could somebody please put me back on track!?!?!?
>   Thanks,
>         --Matt