From: phil_a@tpg.com.au   
      
   "John L Stewart"   
   >   
   > Go to this link- www.hparchive.com   
   >   
   > to see the HP 207A Wide Range Oscillator listed under the equipment   
   > heading.   
   >   
   > 20 Hz to 20 KHz in one twist of the dial. Uses a modified Wein Bridge.   
      
      
   ** OK -  I have had a look at the manual now and that is one cleverly   
   designed piece of kit.   
      
   Getting a 1000:1 frequency range from a tuning gang oscillator is quite a   
   feat and HP make it look so easy.   
      
   The four tube sustaining amplifier and output buffer is a winner too.   
      
   Shame the unit appears to be quite rare.   
      
      
   ....   Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)