RL> That's about the limit for either tube.  The difference is that the 
L34,
 RL> with it's higher plate capacity, is more of a hi-fidelity tube.  It is
 RL> very common to see plate voltages in the 700 to 1000 volt range in hi-fi
 RL> gear producing surprisingly low wattages.  If the 5150 is pushing a
 RL> quartet of 6L6s to 120 watts, I would expect output distortion to be
 RL> somewhere in the range of a late silverface Fender Twin Reverb, which 
as
 RL> virtually none before you go deaf.
       Really? Hmmm... Surprising about the low wattage... What if they were 
to produce a tube with the voltage rating of an EL34 but the efficiency (volt 
to watt) of a 6L6GC? That would be somewhere around 200 watts, huh?        
Well, considering that Sir Edward very rarely plays at low volume and almost 
never clean... :)
 RL> It does sound like something was wrong with it.
       Hmmmm... Yup. :)
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