NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

50L6GT
Beam Power Tube

EIA Base & Outline

EIA Base: 7AC
Source ........................................ RCA RC-29 - 1975

Application

Glass octal type used in output stage of ac/dc radio receivers. Requires octal socket and may be mounted in any position.

Mechanical Data

EIA Base ...................................... 7AC

Electrical Data

Heater Voltage ................................ 50 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 15 pf
Output ........................................ 9.5 pf
Grid to Plate ................................. 0.6 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 117 V
Plate Dissipation ............................. 10 W
Grid No. 2 Dissipation ........................ 1.25 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Peak Grid No. 1 Voltage........................ 8.0 V
Plate Resistance (approx) ..................... 28K Ω
Transconductance .............................. 8000 µMho
Plate Current (Zero Signal) ................... 46 mA
Plate Current (Maximum Signal) ................ 47 mA
Grid No. 2 Current (Zero Signal) .............. 2.2 mA
Grid No. 2 Current (Maximum Signal) ........... 8.5 mA
Load Resistance ............................... 4K Ω
Power Output (approx) ......................... 3.8 W

Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -7.5 V
Peak Grid No. 1 Voltage........................ 7.5 V
Plate Resistance (approx) ..................... 13K Ω
Transconductance .............................. 9000 µMho
Plate Current (Zero Signal) ................... 49 mA
Plate Current (Maximum Signal) ................ 50 mA
Grid No. 2 Current (Zero Signal) .............. 4 mA
Grid No. 2 Current (Maximum Signal) ........... 10 mA
Load Resistance ............................... 2K Ω
Power Output (approx) ......................... 2.1 W

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 02 Jul 2022 07:35:38 -0700