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
4654
High-transconductance Philips output pentode capable of approximately 9 W single-ended Class A audio power.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- P8A
- Base pins
- 8
- Nominal heater
- 6.3 V / 1.35 A
Description
Indirectly heated output pentode.
Socket description
European 8-pin side-contact base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- P8A
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 1.35 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
- 22000 Ω
- Transconductance
- 0.0085 S
- Amplification factor
- 11
- Max plate voltage
- 600 V
- Max screen voltage
- 425 V
- Max plate dissipation
- 18 W
- Max screen dissipation
- 10 W
- Max cathode current
- 120 mA
Published ratings/characteristics promoted from the approved source.
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 Tesla
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
1.35 A
Nominal
Maximum Plate Voltage
600 V
Maximum Plate Dissipation
18 W
Data set 03
1963 Philips Electron Tubes Handbook V1
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
250 V
ClassA
Screen voltage
275 V
ClassA
Cathode resistor
175 ohm
ClassA
Plate current
72 mA
ClassA
Screen current
8 mA
ClassA
Load resistance
3.5 kOhm
ClassA
Power output
9.2 W
ClassA
Plate supply voltage
425 V
ClassB; PushPull
Grid bias
-38 V
ClassB; PushPull
Load resistance plate-to-plate
5 kOhm
ClassB; PushPull
Power output
48 W
ClassB; PushPull
Plate supply voltage
425 V
ClassAB; PushPull
Cathode resistor
265 ohm
ClassAB; PushPull
Load resistance plate-to-plate
6.5 kOhm
ClassAB; PushPull
Power output
27.5 W
ClassAB; PushPull
Characteristic
Transconductance
8500 uS
ClassA
Plate resistance
22 kOhm
ClassA
Data set 04
1969 Tesla Manual of Electronic Tubes
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Heater voltage
6.3 V
Published nominal value
Heater current
1.35 A
Published nominal value
Other
Maximum plate dissipation
18 W
Published maximum rating
Audio output service
PushPull
Class AB push-pull amplifier
Data set 05
1999 Philips 0-D
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
275 V
ClassA
Screen voltage
275 V
ClassA
Plate current
72 mA
ClassA
Screen current
8 mA
ClassA
Load resistance
3.5 kohm
ClassA
Output power
9.2 W
ClassA
Characteristics
Transconductance
8.5 mA/V
ClassA
Plate resistance
22 kohm
ClassA
Capacitance
Input capacitance
14.5 pF
Plate-grid capacitance
0.8 pF