VDG (fwd)

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Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Fri, 25 Feb 2005 14:27:44 -0000
From: Gordon Forrest <gmforrest@xxxxxxxxxxxxx>
To: hvlist@xxxxxxxxxx
Subject: VDG

Hello all,
 
            I recently bought a 400kV VDG and have a few questions. 
 
First of all, the only reason I bought a complete one was the 
difficulty/expence of a sphere in the UK and the good exchange rate £ to
$
at the time.
 
I want to run it with a –ve charge. The problem is that the bottom
roller is
plastic and the top is metal. Do I need to change them round or can I
just
use a –ve spray charge on the bottom? Would a 5kV for a laser do?
 
Also is it possible to remove the top sphere ( 14” ) and connect it with
some
½” copper pipe to the upper collector point?
 
                                                      Gordon