Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Capacitance
Anode-grid capacitance
0.5 pF
Section1
Input capacitance
26 pF
Section1
Output capacitance
19 pF
Section1
Power - Tetrode (NOT beam) ·Tetrode
4Y100D
Dual transmitting tetrode assembly whose parallel sections can produce approximately 220 W Class C RF output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 12.6 V / 3.6 A
Description
Printed co-designation for the 7745 dual transmitting tetrode used for RF power amplification.
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
- 12.6 V
- Nominal heater current
- 3.6 A
- 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
- 800 V
- Max screen voltage
- 350 V
- Max plate dissipation
- 60 W
- Max screen dissipation
- 15 W
- Max grid dissipation
- 2 W
Representative row for repeated identical sections.
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
12.6 V
Published nominal value
Heater or filament current
3.6 A
Published nominal value
Other
Maximum plate dissipation
60 W
Published limit
Maximum operating frequency
80 MHz
Per tetrode
RF output power
220 W
Both sections in parallel; published Class C condition