From: phil_a@tpg.com.au   
      
   "Big Bad Boob"   
    Phil Allison so wittily quipped:   
   >> "Engineer"   
   >>>   
   >>> I had a physically large vintage 300-0-300 VAC Hammond power   
   >>> transformer, along with some other decent used "iron", that I wanted   
   >>> to use in my home-brew "Scratch 20" mono amplifier ("Scratch" means   
   >>> all out of the spares or scrap box, "20" is the targeted rms watts   
   >>> out.)  However, the B+ at about 320 VDC was too low for cathode biased   
   >>> 6L6 output tubes with a 5U4 rectifier. I did not want to use s/s B+   
   >>> rectification as I like to see the glowing tubes... why else build   
   >>> these things?!  I needed a cheap B+ boost rather than a new PT!   
   >>   
   >>   
   >> ** No 5AR4s in your junk box ??   
   >>   
   >>     Would get you another 40-50 volts DC.   
   >   
   > Quite possibly, yes.  But silicon rectifiers (1Kv rating should be enough)   
   > would give you even more.   
      
      
   ** Try reading the last two sentences in the OP's post.   
      
      
      
   ...  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)