41f9ad39   
   From: eikelan@gmx.net   
      
   jlgotham@gmail.com wrote:   
   >  I have a transformer with 5V 4A winding, does it adequate for   
   >  2 x 5R4 since each 5R4 is 5V 2A?   
   >   
   >  thanks!   
      
   The question is not so much if the amperage is OK but if the   
   transformer's isolation is good enough to stand the high voltage of the   
   B+ present on the rectifier's filament (direct heating). Ordinary   
   transformers for low voltage are not designed for this application. If,   
   however your transformer was meant to supply the heaters of rectifier   
   tubes, than you can assume that 300-400V are OK. Well - "assume" does   
   not mean that you can be sure.   
      
   Kind regards, Eike   
   --   
   "Discipline may only mean a hundred men making the same mistake   
    at the same minute"                  - G. K. Chesterton (1908)   
      
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