Re: [TCML] RSG disks - who can make them ?

["Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>]

Hi Chris,

It doesn't take a storage scope, but that would be ideal. Even a basic 
oscilloscope can be used to see the waveforms just hanging a small wire 
in the scope probe about twice the arc length ability. Locking on can be 
difficult if the scope is old. It helps to start at very low power and 
if you can get it locked on, then spend some time deciphering what it is 
your seeing. You'll pick up the secondary as well, but that's no 
problem. If all goes well, you can then increase power. You'll find that 
as power increases, it may quench sooner, but that depends on the gaps 
ability at the new power level. If it gets worse, you know the gap is 
having a problem.

Take care,
Bart

Chris Swinson wrote:
> John,
>
> > Chris,
> >
> > The best way is by using an RF current transformer connected to a  
> > storage
> > scope.
> > This is to look at the primary tank currents.  Many folks have  done 
> > this.
> > Terry F.
> > probably has some stuff written up about it.  Some folks have also  
> > used an
> > antenna at a distance from the coil to pick up the RF and look at it 
> > on the
> > scope, but sometimes it's hard to get a clean signal of the primary. 
> > Instead
> > the secondary and primary signal may be seen overlapped which makes  the
> > display look confused on the scope.  Using a sync rotary, the 
> > waveform can
> > be seen without a storage scope.  Using async gaps, it's hard to see 
> > anything
> > clearly without a storage scope because the signal can't be synch'ed 
> > easily.
> > The modern digital scopes can easily deal with these signals and  issue.
> >
> > John
>
>
> Might be a bit of a problem with me then as I do not have a storage 
> scope :-(  In anycase, I will be using a sync rotor so hopefully This 
> will work. Though as this is a new area of physical testing I have no 
> idea on how to hook it up... Where is Terry when'ya need him :P
>
> Chris
>
>
>
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