From: Julian Green [SMTP:julian-at-kbss.bt.co.uk]
Sent: Thursday, June 18, 1998 4:22 AM
Subject: Re: Strike Rail
> The strike rail is not a complete turn with about 2" gap to avoid shorted
> turn problems.
> I changed it from the picture. This time my plumbing came up to the rail
> via a nice curve then fitted into a right angle joint (running
> horizontally). I concluded it could only be due to this. So instead of the
> right angle pipe joint I curved it with a radius of about 3". Now the
> problem has gone away.
> The reason for passing on this info is that I know some people have suffered
> from breakout in the middle of the secondary but I do not recall any mention
> of strike rail geometry's as possible problems.
> Viv Watts UK.
I have had a similar problem and found that any objects comming near to the
secondary can cause corona discharge. This discharge seems to act like a
rectifier and will charge anything up. On my coil the insulating varnish
was charged and I was getting 6" sparks up the sides of the secondary during
and after I ran the coil. I also got nasty zaps when handling the secondary
afterwards. Run your coil in a dark room to see the corona clouds.