Data set 01
1937 Ken Rad
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Plate Voltage
125 V
A.C. Plate Voltage (RMS) 125 Volts Max.
Plate Current
750 mA
Pealk Plate Current 750 Ma. Max.
Rectifier - Half Wave ·Rectifier
25Z4
Indirectly heated half-wave rectifier for transformerless receivers with series-connected heaters. Rated for approximately 700 V peak inverse voltage, 125 mA DC output, and 750 mA peak current.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 5AA
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 25 V / 300 mA
Description
Cathode-type half-wave rectifier for transformerless receivers with series-connected heaters.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 5AA
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 25 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
5AA - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Rectifier
X-ray radiationInterelectrode capacitances
- Rectifier peak inverse voltage
- 700 V
- Rectifier nominal output current
- 125 mA
- Rectifier peak forward current
- 750 mA
- Rectifier forward voltage drop
- 12 V
Source-defined physical/function section.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Characteristic
Heater/filament voltage
25 V
Published heater/filament rating
Heater/filament current
300 mA
Published heater/filament rating
Tube voltage drop
20.5 V
At 250 mA DC
Other
DC output current
125 mA
HalfWave
Peak inverse voltage
700 V
HalfWave
RMS supply voltage
235 V
HalfWave
Peak current
750 mA
HalfWave