Re: Addendum-DC Tesla

[snip from Ed Phillips post]

> Sure it's rectification due to dissimilar electrodes.  You can
> charge a capacitor with DC from a spark coil if you use such
> electodes, for example a disk and a needle, and play with spark
> length.

[snip from Richard Hull's reply]

>I really doubt if dissimilar metal make a difference.  My experiments all 
>use aluminum-aluminum!  I have nevr used dissimilar metals in my DC work 
>to avoid just such a suggestion.


Are you talking about dissimilar metals, or dissimilar electrode shapes as in
the disk and needle?  

Charles Brush
(finding this whole rectification discussion quite interesting!)