Re: [TCML] Secondary Coil Capacitating

[Gary Lau <glau1024@xxxxxxxxx>]

I think the key word responsible for this phenomenon is "coronal
rectification".  When a HV charge exists between two asymetrical "plates",
current tends to flow more in one direction than the other.  This deposits a
net DC charge on the insulated coating of the secondary.

Regards, Gary Lau
MA, USA

On Tue, Dec 7, 2010 at 4:39 AM, dave pierson <dave_p@xxxxxxxxxxx> wrote:

>
> > I was running my coil tonight, something happened underneath the coil
> > I wanted to check out, so I went to move the secondary,
>    I Assume it was turned off?
>
> > and it shocked me. Nothing brutal, just a carpet spark, but it had
> > been off for several minutes. Why (How?) is it storing electricity?
>    This is not uncommon.  Its been reported here before,
>    tho i can't be sure of an archive keyword.
>     shock
>    might be as good as any...
>
> > Is it between the topload and counterpoise?
>    Depending on coil detail circuit design, charge can
>    be stored various ways.  If the system design does not
>    provide a DC path the topload can store charge.  Less
>    obvious is storage in coil insulation (electrophorus
>    effect).  While the coil output is mostly AC, some
>    stray rectification can take place (point rectifier...)
>    and leave some 'DC' trapped.  Also, any internal cap can
>    end up with some charge, stored, until blead off.
>
>    best
>     dwp
>
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