Voltage - Triode (single) ·Triode
High-mu indirectly heated triode for voltage-amplifier service in receiving and general electronic equipment.
HICH-MU TRIODE AMPLIFIER GENERAL DESCRIPTION Principal Application: The I12SF5 is a
International Octal
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
Except for heater rating, datasheet states 12SF5 and 6SF5 are identical; no external values inferred.
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
4 pF
Section1
Output capacitance
3.6 pF
Section1
Grid-to-plate capacitance
2.4 pF
Section1
Plate voltage
250 V
ClassA
Control-grid voltage
-2 V
ClassA
Plate current
0.9 mA
ClassA
Plate resistance
66000 Ω
Section1
Transconductance
1500 µS
Section1
Amplification factor
100
Section1
Data set 02
Published operating points and test conditions from this source.
Heater voltage
12.6 V
Nominal
Heater current
150 mA
Nominal