Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
Shuguang 12G2P indirectly heated double-diode triode for signal detection, low-frequency amplification and automatic volume control, with 12.6 V 0.15 A heater.
Dual-diode triode for detection, low-frequency voltage amplification, and automatic volume control.
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.
3 physical sections, each with unique specifications.
Section 1
No fixed ratings are recorded for this section.
Shuguang Chinese 12G2P diode section 1 of two physical diodes. Manufacturer specifies maximum anode current 1 mA for EACH diode, not a rectified DC output-current rating; kept in notes rather than rectifier_nominal_output_current. Other diode maximum ratings and typical rectified currents not reliably provided. Indirect heater 12.6 V 0.15 A, heater-cathode max 100 V. Common cathode relationship not definitively verified; base code unassigned.
Section 2
Shuguang Chinese 12G2P double-diode triode, triode section. Maximum anode 330 V, dissipation 0.5 W; typical Va 250 V, Vg -2 V, Ia 1.15±0.65 mA, mu 100±15, gm 1.1±0.3 mA/V = 0.0011±0.0003 A/V. Plate resistance not specified; leave null. Heater 12.6 V 0.15 A, allowed 11.4–13.8 V, heater-cathode max 100 V. Input capacitance 4.2 (+1.2/-1.3) pF, output 3.4 (+1.0/-1.1) pF, transfer 2.0±0.8 pF. Cathode sharing and base-code ID unverified.
Section 3
No fixed ratings are recorded for this section.
Shuguang Chinese 12G2P diode section 2 of two physical diodes. Manufacturer specifies maximum anode current 1 mA for EACH diode, not a rectified DC output-current rating; kept in notes rather than rectifier_nominal_output_current. Other diode maximum ratings and typical rectified currents not reliably provided. Indirect heater 12.6 V 0.15 A, heater-cathode max 100 V. Common cathode relationship not definitively verified; base code unassigned.
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.
HeaterVoltageNominal
12.6 V
Nominal
HeaterCurrentNominal
150 mA
Nominal
MaximumDiodePlateCurrent
1 mA
Per diode
HeaterVoltageNominal
12.6 V
Nominal
HeaterCurrentNominal
150 mA
Nominal
Maximum Plate Voltage
330 V
Maximum Plate Dissipation
0.5 W