[continued from previous message]   
      
   Better is my discrete opamp as a schmitt trigger and it makes a passable   
   looking sq.wave at 470kHz. But the slightest C shunt at output soon rounds the   
   corners of waves as higher F are shunted. For best HF from all test gear   
   making test signals you need    
   to have all outputs rated for 50 ohms output resistance.    
   Patrick Turner.   
      
   Regards,    
   Gio Re   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)