Medium-Mu Triode
The 26 Vacuum tube is a glass type used as an RF voltage
amplifier in AC-operated receivers. It requires a
four-contact socket and was first developed by RCA in
1930.
Electrical Data
Filament Voltage ...................... 1.5 V
Filament Current ..................... 1.05 A
Preferred Substitutes ..................... 126, 226, PA226, UX226, 326