Data set 01
1957 Philips Receiving and Amplifying Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Application
Telephone equipment / preamplifier
Voltage - Triode (single) ·Triode
4609
Low-power directly heated telephone-service triode for preamplifier use in professional communications equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 4.2 V / 250 mA
Description
Telephone-service triode for preamplifier use.
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
- 4.2 V
- Nominal heater current
- 250 mA
- 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 4800 Ω
- Transconductance
- 0.0023 S
- Amplification factor
- 11
- Max plate voltage
- 150 V
- Max plate dissipation
- 1.2 W
- Max cathode current
- 15 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
Triode
Characteristics
Plate voltage
130 V
Plate current
8 mA
Transconductance
2.3 mA/V
Grid voltage
-5 V
Amplification factor
11
Plate resistance
4.8 kohm