Re: Beginner's Tesla coil -First Light!

• To: tesla-at-pupman-dot-com
• Subject: Re: Beginner's Tesla coil -First Light!
• From: "L. Robertson" <LWRobertson-at-email.msn-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Thu, 19 Nov 1998 19:53:53 -0700
• Approved: terryf-at-verinet-dot-com

Hi ...

Before starting on Tesla coils I also used two ignition coils wired
antiparallel driven by a SCR from a 2 uF high voltage cap. I didn't
use any triggering, just let the voltage build up until the SCR fired.

I could get 5" sparks regularly, but much beyond that the coils would
self destruct after a while.

I found the coils I was using resonated at 4 kHz, and if I got them
firing at that rate they would produce a fat green arc, at least until
they started swelling from internal pressure.

LR
> I am able to get 5"+ sparks from two coils (in oil) hooked in series
>(low end of secondaries connected together and to the AC line through
>600V MOV varistors in parallel with 4700 uufd 7 kV bypass capacitors.
>Primary is driven by a quadrac working from a voltage-doubling DC supply
>directly connected to the line, and using resonant charging to get about
>600 volts across the capacitor.  This is the same driver I have posted
>here from time to time.
>
>Ed
>
>
>

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