[AMRadio] Re: Screen Modulated 813

ne1s ne1s at neandertech.com
Mon Dec 11 14:58:10 EST 2006

david knepper writes:
> Zirconium getters best at about 1000 degrees C, this why large metal anode 
> transmitting tubes like the 4-400A, 4-1000A, and 3-500 must be operated 
> with a dull red to red anode color. 

It's also why it's used to "encrust" tweezers ;>) 


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