6AM4

Small Signal Triode — Noval

General Electric

Known Equivalents & Substitutes

CV5073

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Plate Voltage (max)200V

Anode Dissipation (max)Plate Dissipation (max)2W

Heater-to-Cathode Voltage (max)Heater-Cathode Voltage (max)80V

Typical Operating

Anode Voltage (typical)Plate Voltage200V

Anode CurrentPlate Current10mA

Anode ResistancePlate Resistance8,700Ω

TransconductanceTransconductance9.8mA/V

Amplification Factor (μ)Amplification Factor

Capacitances

Grid-to-Plate CapacitanceGrid-to-Plate Capacitance2.4pF

Grid-to-Cathode CapacitanceGrid-to-Cathode Capacitance4.4pF

Anode-to-Cathode CapacitancePlate-to-Cathode Capacitance0.16pF

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.225A

Notes

Five of the nine pins are connected to the grid — when used in grounded-grid operation at high frequencies, all five grid terminals should be grounded to minimize grid-lead inductance.
In cascode amplifier configurations with two tubes in series, the heater-cathode voltage under cutoff conditions may reach 250V.
Interelectrode capacitances with external shield (RETMA 315) connected to grid: Plate-to-Cathode 0.16pF, Cgk 4.6pF (vs 4.4pF without), Cgp 2.8pF (vs 2.4pF without).

Pin Layout — Noval

1Grid

2Cathode

3Grid

References