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Antique Radio Technical Forum
How much voltage should I use

Posted by Doug Criner on 04/09/2009 22:34

Eddie, are your referring to "cathode stripping"? (I put the term in quotes, because some people believe that the concept is misleading or perhaps bogus.)

The basic idea, as I understand it, is that when B+ plate voltage is applied with the cathode not fully hot, the cathode can be damaged. I visualize electrons being physically yanked out of the cathode when thermal emission is low - but probably that is an overly simplistic explanation.

:If you reduce the filament voltage more than a few percent below rating - it will accelerate cathode depletion and the tube will wear out faster.

How much voltage should I use 
Andrew 04/07/2009 17:24 
Doug Criner 04/07/2009 18:46 
Thomas Dermody 04/07/2009 18:49 
Andrew 04/08/2009 13:07 
Doug Criner 04/08/2009 22:13 
Eddie 04/09/2009 21:40 
Doug Criner 04/09/2009 22:34 
Andrew 04/11/2009 15:34 
Lewis L 04/11/2009 21:17 

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