Small tesla coil (1sq ft) findings

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Small tesla coil (1sq ft) findings
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Wed, 24 Jun 1998 00:31:55 -0500
• Approved: tesla-at-stic-dot-net

----------
From:  Jim Lux [SMTP:James.P.Lux-at-jpl.nasa.gov]
Sent:  Tuesday, June 23, 1998 11:06 AM
To:  Tesla List
Subject:  Re: Small tesla coil (1sq ft) findings

Tesla List wrote:
> 
> ----------
> From:  Jeff Corr [SMTP:corr-at-enid-dot-com]
> Sent:  Monday, June 22, 1998 1:13 AM
> To:  Tesla List
> Subject:  Re: Small tesla coil (1sq ft) findings
> 
> Just for a small assumption...  how many watts is a battery capable of
> supplying...  say a 9 volt battery.  Perhaps 4 double "A" batteries...
> I'm just wondering on the ability to produce a coil from a few small
> batteries and a flyback transformer.  Anyone ever tried this?  A small
> handheld coil would be neat.

here are some typical alkaline battery capacities:

D - 13000 mA hr
C -  7000 mA hr
AA - 2450 mA hr
9V -  565 mA hr

NiCd's are about 1/3 the capacity, that is a D NiCd is 4300 mA hr.

You can pull C/4 from a battery safely for a long period. That is, the D
cell can supply about 3 Amps until it goes dead. NiCd's can supply much
higher peak currents ( to the point where they are a fire hazard when
shorted).

BTW, "dead" for a standard battery is 0.9V/cell out of a nominal
1.5V/cell.  NiCd's, of course, are different.

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