[AMPS] B+resistors

Peter Chadwick Peter.Chadwick@gpsemi.com
Thu, 9 Oct 1997 17:18:13 +0100


>Special, high peak energy-absorbing resistors are best, 
>although the cost is high.  

Have you any comments about using big solid carbon or metal film
resistors - things like 50ohm, 50 watt metal film tubular resistors NOT
spirally cut, as are/were made for dummy loads? Similarly,  the carbon
things about 10 inches long and 1 inch diameter?

Your comments on the failure analysis of the tubes you've looked at does
suggest that maybe the glitch resistor is not as important as has been
suggested, because arcs per se don't occur. Unless of course, one
postualtes that the VHF parasitic gets going, and the voltage swing
achieved at the plate is enough to initiate an arc, leading to all the
results..........I dunno


Peter G3RZP 

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