DIY scope

[Rene Schmitz]

Hi all!

Recently I acquired two 30mm oscilloscope tubes. 
(Made in GDR, 1971, the warranty card was still in the box ;-)

Now here is the synth content:
I toy with the idea makeing a small display for waveforms.  
I think I don't need a timebase, X-Y operation will 
suffice, maybe a luminance input. 
I figured out the pinout and heater voltage, and I've been able to get an
unfocussed spot on the screen. 

Now my questions are:
 
How do I best get the required voltages? (The tube has cathode, 
luminance electrode (g1), a focussing electrode (g3) and the anode. 
Two deflection caps.)  
A small switcher perhaps? Can I get away with a single supply of 
say 800V and make a tap for the focussing electrode? How much current 
will the anode and the focussing electrode draw? Do I have to ground the 
anode, or the cathode?  

Oh, and if somebody has any informations about a B4S2 crt, let me know.
 
Bye
 René

opinionsexpressedher   | uzs159 at uni-bonn.de
einarethatofmyemploy   | http://www.uni-bonn.de/~uzs159
erandnotofmyself....   | http://members.xoom.com/Rene_Schmitz