57
- First year: 1932
- Base: 6-Pin-Base U6A, old, USA (Codex=Kf)
- Filament: Vf 2.5 Volts / If: 1 Ampere / -: Indirect / -: Parallel, (AC/DC) /
- Identical to: = PH257 = 257 = UZ-57 = A257 = VT-57 = W2161 = PH57
- Tube type: Vacuum Pentode RF/IF-Stage
Published by:
dido