[BC] the Purple tube...

[DHultsman5@aol.com]

In a message dated 12/29/05 3:16:03 P.M. Central Standard Time,  
looey323 at yahoo.com writes:

And  finally, a few of the older limiters and modulation monitors I know of 
used  NE32 or similar lamps as a voltage reference tubes, and 885 or 2D21 
thyratrons  to handle the overmodulation or peak indicators.  I used many of the CP 
 Clare gas-filled surge supressor


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I have forgotten which Modulation Monitor used it but one used a 2D21 to  
fire a relay which caused the peak flasher lamp to light.  You could tell  when 
you were over modulating by the clicks inside the mod monitor  chassis.
 
Dave