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
4654K
Octal-base version of the Philips 4654 high-transconductance audio output pentode.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 1.35 A
Description
Octal-base variant of the 4654 output pentode.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- 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
Philips output pentode; the source sheet prints both 4654 and 4654K, which share the same published electrical characteristics but use different bases.
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
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 03
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