Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Capacitance
Input capacitance
14 pF
Maximum
Output capacitance
7 pF
Maximum
Other
Maximum anode dissipation
25 W
Power - Tetrode (NOT beam) ·Tetrode
4Y25
807-family transmitting tetrode for RF amplification, oscillator, modulator, and audio-frequency power service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 900 mA
Description
Printed co-designation for the 807 transmitting tetrode for RF, audio and oscillator service.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 900 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
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
Tetrode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 600 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 25 W
- Max cathode current
- 100 mA
Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.
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
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Heater or filament voltage
6.3 V
Published nominal value
Heater or filament current
900 mA
Published nominal value
Other
Maximum plate dissipation
25 W
Published limit
Maximum operating frequency
60 MHz
Class C service