Dummy loads (was: Re: new here) - test-drb@ccmp.vtda.org

27 Apr 2011

...
   > > The
reason is quite simple--tungsten-filament lamps (not that I
 > > expect anyone to have any carbon-filament ones) have a very   steep
   >
resistance-temperature curve (higher "hot" resistance). 
 HP remembered this.  Indeed they did. In the Mdoel 200 Audio Oscillator for one
thing ;-)

 I am sure it's mentioned in one of Fred Terman's books too, not
 suprisingly...

 -tony 
 IIRC using a light bulb is a/the classic way of stabilising the 
 amplitude of an audio oscillator. I have seen it in several designs.

 /Jonas