Scope pics...

[Bruce Plecan]

The output side of transfomer is A/C.
It's just that simple.
You can argrue and dance around things all you want.
Biased high or low, it's A/C  might be riding on an dc bias,
A DC spark is lightning.
If the plug was firing a DC voltage just one side would erode.

If it looks like a duck, yada yada
Bruce




----- Original Message -----
From: <don.broadus at exeloncorp.com>
To: <gmecm at diy-efi.org>
Sent: Monday, November 13, 2000 8:55 AM
Subject: RE: Scope pics...


> Obewahn : I feel a tremor in the list Bruce
> Bruce:    There is a lot of stubbornness in this one Gerald
>               Obewahn
>
> > -----Original Message-----
> > From: Gerald Pelnar [SMTP:wd0fyf at mpks.net]
> > Sent: Saturday, November 11, 2000 1:01 AM
> > To: gmecm at diy-efi.org
> > Cc: DIY-EFI
> > Subject: Re: Scope pics...
> >
> > Hey Bruce--
> >
> > I thought this was on DIY instead of GMECM.
> >
> > Anyway, you have put forth a very good explanation. The only
> > problem I see, which may be a sticking point, is your use of A/C
> > rather than a more accurate discription of varying DC. AC
> > implies the current alternates (changes direction) which it doesn't,
> > except for some of the ocillations after the spark extinguishes, where
> > the voltage may drop below zero.
> >
> > Gerald Pelnar
> > wd0fyf at mpks.net
> > http://www.mpks.net/homepage/wd0fyf/
> > McPherson, KS
> >
> >
> > ----- Original Message -----
> > From: Bruce Plecan <nacelp at bright.net>
> > To: <gmecm at diy-efi.org>
> > Sent: Friday, November 10, 2000 10:38 PM
> > Subject: Fw: Scope pics...
> >
> >
> > >
> > >
> > > Thanks Shannen
> > > If ya all (who are still interested), look at this, maybe we can get
> > > somewhere.
> > >
> > >  http://www.aeswave.com/framedcatalog/product_0112sec.htm#accessories
> > >
> > > Starting at the left edge:
> > >
> > > Is a *12* volt signal,  then we have the points close signal (note
there
> > are
> > > coil condenser oscillations {ie A/C}), As the coil saturates you see
the
> > > voltage build, then the point open signal a huge vertical spike, note
> > that
> > > the are some *notches* *steps* as the voltage is at or near the max
> > voltage,
> > > these are the coil oscillations of the *ringing of the collapsing*
> > fields,
> > > *typically* this spike is around 25Kv, and is when the ionization is
> > forming
> > > between the electrodes, finally there is an arc over, and the *firing
> > line*
> > > reflects that with a horizontial segment (again typ. 12 Kv), that can
> > vary
> > > (at idle) from .7 to 1.8 msec. that is the time where there is an
> > > established arc.  Once there is no longer enough *ions* between the
> > > electrodes, the voltage is no longer high enough to maintain an arc
and
> > the
> > > arc stops, and there is the large drop to 0 and even slightly less.
> > But,
> > > there is the current that was shut off still ringing in the system
> > remember
> > > the points are still open so there is still energy to disipate,  we
ran
> > out
> > > of ions for a 12Kv path so we have 11.5Kv (about) that will have to
> > > disipate, and then we have the large coil condneser oscillations.
Then
> > we
> > > go off screen, and would again begin at the l/h border, and begin the
> > cycle
> > > all over again.
> > >    Other then at the + side of the coil everything else is voltages
from
> > the
> > > collapsing fields weither charging or discharging,  the coil, A/C
> > >
> > > Take a transformer,
> > >    Put a meter across  the secondary posts,
> > >    Apply power to the primary,  secondary pegs for an instant, then
goes
> > 0,
> > > with the primary is still on, remove primary voltage another spike,
> > again
> > > output goes to 0.   Transformers don't work on a strickly DC
component,
> > > That's the best I can do.
> > > Slice it anyway you want but that is the only circumstance that
explains
> > all
> > > the conditions for a Waste spark.   IE one plug, can fire reguardless
of
> > the
> > > is going on with the other.
> > >
> > > Take a convention autotransformer with a point open signal the one
side
> > of
> > > the secondary is only to 12+ thru the primary.   Since one side of the
> > > secondary is open to ground I guess the plug never fires.
> > >
> > > You check for spark with a grounded tester so that there is some
control
> > of
> > > spark energy.
> > > Opening both sides of a secondary side of ignition coil will force
then
> > > spark energy to disipate somewhere, and that is what ever is the path
of
> > > least resistance.   If the points are open the A/C will just ride
along
> > the
> > > 12+ supply side just fine.   Well til the capacidance (?) of the
battery
> > > *absorbs* it...
> > >
> > > HTH
> > > Bruce
> > >
> > >
> > >
>
> --------------------------------------------------------------------------
> > --
> > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the
quotes)
> > > in the body of a message (not the subject) to
> > majordomo at lists.diy-efi.org
> > >
> > >
> >
>
> --------------------------------------------------------------------------
> > --
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo at lists.diy-efi.org
>
>
>
****************************************************************************
*****
> This E-mail and any of its attachments may contain Exelon Corp.
proprietary
> information, which is privileged, confidential, or subject to copyright
> belonging to the Exelon Corp. family of Companies.  This E-mail is
intended
> solely for the use of the individual or entity to which it is addressed.
If
> you are not the intended recipient of this E-mail, you are hereby notified
> that any dissemination, distribution, copying, or action taken in relation
> to the contents of and attachments to this E-mail is strictly prohibited
> and may be unlawful.  If you have received this E-mail in error, please
> notify the sender immediately and permanently delete the original and
> any copy of this E-mail and any printout.  Thank You.
>
****************************************************************************
*****
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org