Hi folks,
  I'm trying to design a HV power supply to drive a DG7-32 CRT tube. I need the following outputs:
    +6V AC/DC - heater supply. Isolated from everything else. 300mA minimum.
    +400V DC  - deflection amplifiers
    +300V DC  - CRT anode
    -300V DC  - brightness and focus control
    -200V DC  - cathode

  Basically, what I want is something like the power supply circuit at <http://www.webx.dk/oz2cpu/clock-scope/scope.htm> but without the huge mains transformer. Ideally I want to run it off a 12V (or thereabouts) supply - i.e. a rechargeable battery pack (probably NiMH but equally likely a 14.4V 2AH Li-ion).

  Does anyone have any suggestions? I was thinking of using a switchmode supply for the HV, but I haven't heard of any decent books or webpages that cover HV switcher design. Current requirements for the HVs are pretty meagre - less than 10mA total. The big problem is the 6V heater supply that needs to be isolated from (at the very least) the HVs.

('scuse the "posted by Oakmailer" tag; I'm sending this through webmail and Oakmailer insists on tagging outbound mail)

Thanks,
Phil.

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