From: phil_a@tpg.com.au   
      
   "John Byrns"   
      
   > The only improvement I would make would be to improve the hum and noise   
   > spec.   
   > which is 80 dB below 15 Watts, I would make that 80 dB below 1 Watt.   
      
      
   ** My example measures 155uV ( 20Hz to 20kHz)  = 97dB below 15 watts.  Most   
   of this is 50 Hz and some 150Hz injection from the mains transformer -   
   which is larger than the original.   
      
   The multipin connector has been replaced with an 6.3mm jack, the Bulgin AC   
   inlet with an IEC and new resistors and film caps were fitted 30 years ago.   
   The original, loomed wiring is unchanged.   
      
   The -80dB figure is a furphy related to active supply wiring in close   
   proximity to a 1Mohm input.   
      
   It would still be inaudible in practice.   
      
      
   ...  Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)