07-30-2018, 02:17 PM
I also think of putting a 15V zener across the C28.
In case of any filament going open the C28 might develop much larger voltage than the rated 25V. Not just that, if inserting a tube without letting it drain it might blow the rest of the filament.
The nominal voltage across all filaments is 9.8V, so 15V I have handy should do fine.
In case of any filament going open the C28 might develop much larger voltage than the rated 25V. Not just that, if inserting a tube without letting it drain it might blow the rest of the filament.
The nominal voltage across all filaments is 9.8V, so 15V I have handy should do fine.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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