Tubes Asylum

• Re: tube regulated power supplies - Jean 17:08:51 11/06/02 (0)
  In Reply to: tube regulated power supplies posted by Chris Spafford on November 04, 2002 at 23:51:31:

  Tubes régulateurs série : 4 Y 100 R Va 800V I 750mA, 6336 A Va 400V I 400mA
  
  

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• Re: tube regulated power supplies - j.l.guillebeau@att.net 08:42:15 11/05/02 (1)
  In Reply to: tube regulated power supplies posted by Chris Spafford on November 04, 2002 at 23:51:31:

  There was one for sale last week on ebay. Search Ampex (all categogy). He may list it again.http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1392717722 Also look under HP power supplys. Also RCA BX-21A (broadcast power supply). It would be easier for you to build one. Three tubes, 6AS7/6080, 12AX7, & OA2, a good transformer, and a choke. The best! James
  
  

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  • Re: tube regulated power supplies - Chris Spafford 09:28:51 11/05/02 (0)
    In Reply to: Re: tube regulated power supplies posted by j.l.guillebeau@att.net on November 05, 2002 at 08:42:15:

    Thanks, James. I may build one to save the enormous shipping charge for those dinosaurs! Chris
    
    

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• Re: tube regulated power supplies - Tiny Daddy 06:18:34 11/05/02 (3)
  In Reply to: tube regulated power supplies posted by Chris Spafford on November 04, 2002 at 23:51:31:

  Interested in building it yourself? Even so, it may be cheaper to buy a car and drive it. I have never found a source other than military surplus which dried up 30 years ago, or full custom designs. Also the military power supplies weighed hundreds of pounds.
  I suggest at these voltages/currents, tube regulation may be more robust than SS.
  
  

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  • Re: tube regulated power supplies - Chris Spafford 08:35:35 11/05/02 (2)
    In Reply to: Re: tube regulated power supplies posted by Tiny Daddy on November 05, 2002 at 06:18:34:

    Yes-- That's what I'm after. I have a lamda and a Sorensen Nobatron which both provide up to 800 ma of DC, but the voltage max is 450 on the Nobatron and 325 on the Lamda. They both weigh about 60 lbs each and burn 12 6L6GC at a time! I'm looking for a Kepco Labs or Hewlett-Packard lab supply with B+ and B- as well as filament on board. Chris
    
    

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    • Re: tube regulated power supplies - Ed Sawyer 19:08:42 11/05/02 (0)
      In Reply to: Re: tube regulated power supplies posted by Chris Spafford on November 05, 2002 at 08:35:35:

      Chris - check at any local Hamfests near you - I've seen big mutha tube PS's at hamfests on a regular basis. Every month in the summer at MIT they have a big flea market, all electronics - both modern computer stuff and old tube/military stuff. Saw many old powersupplies and such at those meets too. Good luck.

      thanks
      -Ed

      
      
      

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    • Re: tube regulated power supplies - Tiny Daddy 15:39:25 11/05/02 (0)
      In Reply to: Re: tube regulated power supplies posted by Chris Spafford on November 05, 2002 at 08:35:35:

      OK I have a Unitron that was rated at 300V, 300ma but will actually adjust to over 600V out! To supply 600V continuously I added some zeners and also some diodes to protect the op-amp inputs. Also replaced some caps with higher voltage rating. The voltage before regulation is 750V. The control circuitry is below ground so the supply is adjustable to 0V. There are no chokes.
      Perhaps you could modify your PS for more voltage. Schematics I traced out look like standard stuff and are posted:
      

      • http://www.geocities.com/tinydaddy2000/

      
      

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