Re: [Amps] Thoriated tungsten lifetime when idling tspa

[Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>]

There can definitely be a problem running oxide coated cathodes for a long time 
without drawing current: it leads to a build up of cathode interface 
resistance, and according to one of my textbooks (I hesitate to admit owning 
one on pulse and digital circuits, being somewhat akin to admitting to owning 
pornography !) it was a major cause of failure in early tube computers.
73
Peter G3RZP
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps