[continued from previous message]   
      
   correctly discovered the phenomenon of doubling of the um frequency, he   
   misunderstood its cause attributing it to temperature modulation, while in   
   fact it is caused by "anode-bend" full wave heater voltage rectification on   
   both end of the filament.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)