[Amps] Grid fuses (was: Life and gain of 3-500Z)

[R L Measures]

On Jul 20, 2006, at 2:48 PM, Joe Subich, W4TV wrote:

>
> Rich writes:
>
>>> On the other hand, if most damage to the grid occurs very
>>> quickly, then one would probably want fast-acting, electronic
>> protection.
>>
>>
>> ... provided that the transistor used to interrupt grid-current
>> was up to the task.
>
> There you do again ... there is no need to directly interrupt the
> grid current with a transistor.  As long as the anode has sufficient
> current limiting (arc protection) which is normally provided by the
> "glitch resistor," it is sufficient to bias the tube to cutoff.
> That can be done by the normal T/R circuitry, ...

Incredible
...
R L MEASURES, AG6K. 805-386-3734
r at somis.org