Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
150 mA
Voltage Pentode - Sharp Cutoff (single) ·Pentode
5638
Subminiature pentode designed for compact voltage-amplifier service in communications, instrumentation, and other space-constrained equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 5638
- Socket code
- SUBMINIATURE6
- Base pins
- 6
- Nominal heater
- 6.3 V / 150 mA
Description
Subminiature pentode voltage amplifier.
Socket description
Subminiature 6-lead base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 5638
- Socket code
- SUBMINIATURE6
- Base pins
- 6
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
5638 - 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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 150000 Ω
- Transconductance
- 0.0033 S
- Max plate voltage
- 150 V
- Max screen voltage
- 140 V
- Max plate dissipation
- 0.6 W
- Max screen dissipation
- 0.2 W
Amplifier pentode; 100-V Class A point promoted.
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
Pentode
Other
Plate Voltage
100 V
ClassA
Screen Voltage
100 V
ClassA
Cathode Resistor
270 ohm
ClassA
Plate Current
4.8 mA
ClassA
Screen Current
1.25 mA
ClassA
Capacitance
Input Capacitance
4 pF
Output Capacitance
6.5 pF
Grid-to-Plate Capacitance
0.19 pF