not experienced
but page 6 of rc10 manual states that "Filament-cathode types of tubes are particularly well suited for operation from a steady source of filament supply voltage such as a battery"
and The heater-cathode construction is well adapted for use in radio tubes intended for operation from a-c power lines.
so this might be a start for recommended usage.
rgds
garbage
but page 6 of rc10 manual states that "Filament-cathode types of tubes are particularly well suited for operation from a steady source of filament supply voltage such as a battery"
and The heater-cathode construction is well adapted for use in radio tubes intended for operation from a-c power lines.
so this might be a start for recommended usage.
rgds
garbage
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