Data set 01
1957 Philips Receiving and Amplifying Tubes
Published operating points and test conditions from this source.
SECTION 1
Pentode
Application
Application
Audio output
Power - Pentode (NOT beam) ·Pentode
4650
Directly heated Philips audio power pentode delivering approximately 10 W single-ended Class A output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 4 V / 2 A
Description
Directly heated output pentode for Class-A, B, and AB 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
- 4 V
- Nominal heater current
- 2 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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 20000 Ω
- Transconductance
- 0.0039 S
- Max plate voltage
- 550 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 25 W
- Max screen dissipation
- 4.3 W
- Max cathode current
- 100 mA
Published Philips ratings and operating data promoted where 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
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
300 V
ClassA
Screen voltage
300 V
ClassA
Plate current
83 mA
ClassA
Screen current
4.6 mA
ClassA
Load resistance
3.6 kohm
ClassA
Output power
10.3 W
ClassA
Characteristics
Transconductance
3.9 mA/V
ClassA
Plate resistance
20 kohm
ClassA