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Tesla Coil Transformer Query




Hello,
My first post.

I'm currently building a coil around a transformer used, I think, for
boiler ignition purposes (I got it from a central heating equipment shop).
It is rated at 10kV 20mA but says on the case "For Intermittent Use Only"
and then "33% ED in 3min".
What does this mean and will the unit be okay for a TC?
I'm also going to use 5 X 0.001 uF mica caps rated at 20kV (ex admiralty)
with probably a static gap.
What sort of spark length can I expect with this coil assuming it is a
good one?

Many thanks in advance for any info

Neil
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From:    Neil E Pegg
email:   Neil.Pegg-at-src.bae.co.uk

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