[Amps] Glitch resistor

[Vic Rosenthal]

As I understand it, the glitch resistor is not supposed to be a fuse. In the event of a flashover, it is supposed to limit the current so that components (even the tube) won't be damaged in the time before the primary fuse in the power supply opens. 
I believe that 10 ohms is on the low side and 25 ohms would be better. During normal operation it will dissipate I**2 * R watts, so 25 or 35 watts should be adequate. A vitreous enameled resistor is recommended to take the short but heavy overload in the event of a flashover. Those rectangular wirewound resistors containing sand are NOT recommended.
Also it's important to have correctly sized primary fuses.

Vic 4X6GP

> On 13 Nov 2016, at 03:52, Dick NY1E <dick at ny1e.com> wrote:
> 
> My SB220 stopped operating, with no plate current and pegging the grid meter after a bright light out of the rear fan grill. It seems an added glitch resistor opened, 10 ohm 10 watts doesn't seem big enough. did it do its job and sacrifice itself? The resistor looks fine no burns or anything. Should it be bigger or keep this size as a fuse?de Dick NY1E
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