Higher-current (150 mA) Noval rectifier, but JEDEC 9M pinout — pins differ, not a drop-in
Electrical Specifications
Absolute Maximum
Anode Voltage (max)AC Plate-Supply Voltage per Plate (max RMS, choke-input)450V
Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max, heater negative)450V
Rectifier
Peak Inverse VoltagePeak Inverse Voltage (altitudes up to 60,000 ft)1,250V
Voltage Drop (typical)Tube Voltage Drop (at 70 mA per plate)22
Notes
Industrial/premium GE 'Five-Star' tube. Designed for mobile and aircraft equipment subject to mechanical stress, shock, vibration, and altitudes up to 60,000 ft.
JEDEC base code 9CD — uses the B9A (Noval) 9-pin miniature envelope with a rectifier-specific pin layout. NOT pin-compatible with EZ80/EZ81 (which use 9M) despite sharing the Noval form factor.
Common-cathode topology (single shared cathode on pin 7) — not suitable for voltage-doubler use.
Heater-cathode voltage limits are asymmetric: +100 V (heater positive) / 450 V (heater negative).
Vdrop 22 V measured at 70 mA per plate (per GE March 1953 datasheet).
Typical operation delivers 70 mA DC output at 325 V RMS per plate with capacitor input filter, or 450 V RMS per plate with choke input filter. Max total DC output current rating: 77 mA (per rectifier_reference.json; datasheet Rating Chart I limits per-plate current to ~35-42 mA depending on conduction angle).
Peak transient plate current 1.8 A (0.2 s max duration); steady-state peak plate current per plate 270 mA.
Bulb temperature limit: +200 °C (hottest point, absolute max).