[AMPS] Henry 2K2; glitch resistor in negative HV considerations

[Rich Measures]

>
>Rich, Ian & all...
>
>Am I missing something? There's no reason for the cathode and bias circuit 
>to go way negative when the "glitch resistor" is in the negative HV lead 
>and a +HV arc occurs.
>
>Putting the resistor in the negative lead means only that the -HV POWER 
>SUPPLY SIDE of the resistor goes to ~full -HV during a +HV short or arc to 
>ground. The cathode side of the resistor should be at or close to ground 
>potential for negative voltage, so that the full HV drops across the 
>resistor.

€  good point, Dick.  However, the problem of additionally insulating the 
neg. HV circuit is obviated by putting the glitch-R in the positive HV 
lead -- as is recommended by numerous power grid tube manufacturers.  . 
 .  In the Henry Radio 3-500Z amplifiers that have a glitch-R in the neg. 
lead, I have heard of many instances of grid-fil shorts occuring during a 
big-bang.  .  
>
-  cheers


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm