-> For a really big power amp, why not direct rectify the 13.8 kV lines? -> 
It's possibly to make some several hundred kW amps with just pairs of -> 
tubes as finals using those voltages.  
 DH> I never thought of that!  What the heck would you use for power lines
 DH> though?  The same ones that are strung along the road?  Of course, we
Yes.  Without two extra intermediate transformers, transient current delivery 
should be enhanced.   
 DH> are talking about just a *LITTLE* overkill here.  It's not like any
 DH> speaker could handle that power.  In fact, I try and stay well away from
Of course, but Eimac makes tubes where two pairs could be used to build a 
stereo 2 MW per channel amp.  They can build speakers to match, can't they?  
  
 DH> that much power!  It's quite lethal if handled inappropriately.  Of
 DH> course, so is 120v & 100A, but it's just not in the same class as 13.8kV
 DH> & thousands of amps.
600 A 3 phase should do it at that voltage, for one stereo amp.  
Terry
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