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6973
Beam Power Tube

EIA Base & Outline

EIA Base: 9EUEIA Bulb: 6-4
Source ........................................ RCA RC-29 - 1975

Application

Miniature type used as power amplifier in compact high-fidelity audio equipment. Requires miniature 9-contact socket.

Mechanical Data

Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-4
EIA Base ...................................... 9EU
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 9 pf
Output ........................................ 6 pf
Grid to Plate ................................. 0.4 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 440 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 12 W
Grid No. 2 Dissipation ........................ 2 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -15 V
Plate Resistance (approx) ..................... 73K Ω
Transconductance .............................. 4800 µMho
Plate Current ................................. 46 mA
Grid No. 2 Current ............................ 3.5 mA

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -15 V
Plate Current (Zero Signal) ................... 92 mA
Plate Current (Maximum Signal) ................ 105 mA
Grid No. 2 Current (Zero Signal) .............. 7 mA
Grid No. 2 Current (Maximum Signal) ........... 16 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 12.5 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 350 V
Grid No. 2 Voltage ............................ 280 V
Grid No. 1 Voltage ............................ -22 V
Plate Current (Zero Signal) ................... 58 mA
Plate Current (Maximum Signal) ................ 106 mA
Grid No. 2 Current (Zero Signal) .............. 3.5 mA
Grid No. 2 Current (Maximum Signal) ........... 14 mA
Load Resistance ............................... 7.5K Ω
Power Output (approx) ......................... 20 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 290 V
Grid No. 1 Voltage ............................ -25 V
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 107 mA
Grid No. 2 Current (Zero Signal) .............. 2.5 mA
Grid No. 2 Current (Maximum Signal) ........... 13.7 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 24 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 230 Ω
Plate Current (Zero Signal) ................... 80 mA
Plate Current (Maximum Signal) ................ 96 mA
Grid No. 2 Current (Zero Signal) .............. 6 mA
Grid No. 2 Current (Maximum Signal) ........... 14 mA
Load Resistance ............................... 5.5K Ω
Power Output (approx) ......................... 15 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 310 V
Grid No. 2 Voltage ............................ 310 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Plate Current (Zero Signal) ................... 77 mA
Plate Current (Maximum Signal) ................ 92 mA
Grid No. 2 Current (Zero Signal) .............. 5 mA
Grid No. 2 Current (Maximum Signal) ........... 14 mA
Load Resistance ............................... 6K Ω
Power Output (approx) ......................... 17 W

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Mon, 03 Oct 2022 17:01:21 -0700