Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Operating Frequency Maximum
1000 MHz
Plate Voltage
100 V
Plate Current
20 mA
Characteristic
Transconductance
6000 µS
Voltage - Triode (single high frequency) ·Triode
6AF4A
High-frequency triode for UHF/VHF amplification, mixing, or oscillator service in television, FM, communications, or specialized RF equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- E7-1
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 225 mA
Description
UHF triode (6AF4A) with low lead inductance for oscillator and grounded-grid amplifier service.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- E7-1
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 225 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E7-1 - 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
- 2100 Ω
- Transconductance
- 0.0065 S
- Amplification factor
- 13.5
- Max plate voltage
- 150 V
- Max plate dissipation
- 2.5 W
- Max cathode current
- 28 mA
- Rectifier peak inverse voltage
- 0.022 V
UHF triode oscillator section.
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
Triode
Capacitance
Input capacitance
2.2 pF
Published table value
Output capacitance
0.45 pF
Published table value
Grid-to-plate capacitance
1.9 pF
Published table value
Other
Plate voltage
80 V
ClassA
Cathode resistor
150 ohm
ClassA
Plate current
16 mA
ClassA
Data set 03
1965 Westinghouse Data Book
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
HeaterOrFilamentVoltage
6.3 V
HeaterOrFilamentCurrent
225 mA
Plate Voltage
100 V
Grid Voltage
-2.5 V
Plate Current
12 mA
Plate Resistance
5000 ohm
Transconductance
7000 uS
Amplification Factor
35
Grid To Plate Capacitance
1.5 pF
Input Capacitance
2 pF
Output Capacitance
1 pF
MaximumOperatingFrequency
500 MHz
Oscillator
Data set 04
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
80 V
UHFOscillator
Plate current
17.5 mA
UHFOscillator
Plate voltage
100 V
GroundedGridAmplifier
Plate current
17 mA
GroundedGridAmplifier
Application
UHF oscillator and grounded-grid amplifier service
Section1
Characteristic
Transconductance
6500 µS
Section1
Amplification factor
13.5
Section1
Plate resistance
2100 Ω
Section1
Data set 05
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterOrFilamentVoltageNominal
6.3 V
HeaterOrFilamentCurrentNominal
225 mA
Maximum Plate Voltage
150 V
Maximum Plate Dissipation
2.5 W
Maximum Peak Inverse Voltage
0.022 V
Characteristic
Plate Resistance
2100 Ohm
Transconductance
6500 uS
Amplification Factor
13.5