Voltage - Triode (single high frequency) ·Triode
Miniature UHF triode for television-tuner oscillator and amplifier service.
Miniature UHF triode (2AF4) for television tuner oscillator and amplifier service.
Miniature 7-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Reference/heater-variant sheet; no unprinted electrical ratings were imported from the referenced 6-series datasheet.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Input capacitance
2.2 pF
Section1
Output capacitance
0.45 pF
Section1
Grid-to-plate capacitance
1.9 pF
Section1
Plate voltage
80 V
ClassA
Cathode resistor
150 Ω
ClassA
Plate current
16 mA
ClassA
Plate resistance
2270 Ω
ClassA
Transconductance
6600 µS
ClassA
Amplification factor
15
ClassA
Data set 02
Published operating points and test conditions from this source.
Heater Warmup Time
11 s
Plate Voltage
80 V
ClassA
Grid To Plate Capacitance
1.9 pF
Data set 03
Published operating points and test conditions from this source.
Heater Voltage
2.35 V
Heater Current
600 mA
Maximum Plate Voltage
150 V
UHF Oscillator
Typical Plate Supply Voltage
100 V
UHF Oscillator; 1000MHz
Typical Operating Frequency
1000 MHz
UHF Oscillator
Maximum Heater-Cathode Voltage
50 V
TotalDCPlusPeak
Data set 04
Published operating points and test conditions from this source.
Plate voltage
150 V
UHFOscillator
Plate current
20 mA
UHFOscillator
Application
UHF television oscillator/amplifier
Section1
Plate resistance
2100 Ω
Section1
Transconductance
6500 µS
Section1
Amplification factor
14
Section1