Full-wave rectifier with same heater voltage but Noval base — not pin-compatible
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Max AC Voltage per Anode (RMS)350V
Rectifier
Peak Inverse VoltagePeak Inverse Voltage1,000V
DC Output Current (max)DC Output Current (max)90mA
Heater
Heater VoltageHeater Voltage6.3V
Notes
The EZ11 uses the Rimlock (B8A) base, which was Philips' standard before the transition to Noval. The Rimlock base has 8 pins with a metal locating ring.
Brans Vademecum lists the EZ11 in table IId alongside AZ31, EZ1, EZ40, EZ41, 5Y3G/GT, 5Y4G/GT — these share similar function but differ in base and/or heater voltage.
The 6V4 is the American designation. CV number not assigned for this type.
Sams substitution guide lists 6V4 as the substitute.