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.
Heater-to-Cathode Voltage (max)Heater-Cathode Voltage (max)500V
Rectifier
Peak Inverse VoltagePeak Inverse Voltage (max)1,000V
AC Plate Voltage (RMS, max)AC Plate Voltage (RMS, max)325V
Max DC Output Current (total, not per-anode)Max DC Output Current45mA
Notes
The 1-V supersedes the mercury-vapor type 1 and is interchangeable with it.
Indirectly heated: coated unipotential cathode with separate heater.
DC heater-cathode potential must not exceed 500V.
Under no condition of operation should the heater voltage fluctuate beyond 6.3V +/- 10% (max 7.5V).
Typical operation with condenser-input filter: at 117V AC plate (RMS), supply impedance 0 Ohm, DC output current 45 mA max. At 150V AC plate, supply impedance 30 Ohm min, DC output 45 mA max. At 325V AC plate, supply impedance 75 Ohm min, DC output 45 mA max.
When a filter-input condenser larger than 40 uF is used, it may be necessary to use more plate-supply impedance than the minimum value shown to limit peak plate current to 270 mA.
Tube drop approximately 20V at 90 mA DC (per TDSL).
Pin Layout — UX4
1Heater
2Plate (Anode)
3Cathode
4Heater
Socket-Compatible Tubes ⚠ Not electrically compatible