[Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ?

[Steve Thompson]

R.Measures wrote:
>> -----Original Message-----
>> From: Vic Rosenthal [mailto:vic at rakefet.com]
>> Sent: Sunday, December 28, 2003 10:19 PM
>> To: bill at wjschmidt.com
>> Cc: 'R. Measures'; frank_goenninger at t-online.de; 'AMPS'
>> Subject: Re: [Amps] 3.5 kV 2A REGULATED Power Supply: Schematic ?
>>
>> Dr. William J. Schmidt, II wrote:
>>>  So you mean I can just replace my bias supply with a charged
>>> capacitor.. .since you think the tube puts no current load on the
>>> bias supply?
>>
>> If it is pure AB1, never driven into grid current, and if the
>> capacitor and circuitry have zero leakage, then I don't see why not!
>>
> **  Because the tube needs to be biased to cutoff at turn-on or the
> tube will draw maximal anode current.  For example, with 0v on the
> grid, a 4cx1500A draws c. 3A at 4000V.
A capacitor might not be ideal, but a suitable voltage battery could be
used, and probably last most of its shelf life.

Steve