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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
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
>resonance,
>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
>poor
>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
>deco
>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
>powered
>coils being 1 1/2" ABOVE the primary to enhance the coupling.
>
> Could somebody please put me back on track!?!?!?
>
> Thanks,
>
> --Matt
>
>