Data: MediumMedium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Similar medium-mu triode (mu=20) on Octal base — successor design
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)250V
Typical Operating
Anode Voltage (typical)Anode Voltage (typical)250V
Grid 1 Bias VoltageGrid 1 Bias Voltage-3V
Anode CurrentAnode Current1mA
Notes
Pre-Octal era triode on 5-pin UX5 base — used in radio receivers and audio equipment of the early 1930s.
Raytheon data shows two operating conditions: Class A amplifier (Va=250V, Vg=-25V, Ia=5mA, gm=750, ra=8500, mu=9.2) which appears to be a power/driver condition; and the GE Essential Characteristics lists Va=250V, Vg=-3V, Ia=1mA, gm=1200, ra=58000 for voltage amplifier service.
The type 76 (Raytheon substitute) is the same tube under its alternate designation.
Pin configuration follows the standard UX5 layout used in pre-Octal American tubes.