High-Mu Triode - Beam Power Tube
The 6LU8 Vacuum tube is a duodecar type tube used in
combined vertical-deflection oscillators and amplifiers
in color tv receivers. They require a Duodecar
12-contact socket.
Mechanical Data:
Bulb ................................ T-12
Base.......................... E12-74 Button 12-Pin
Outline ....................................... 12-57
EIA Base ...................................... 12DZ
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.5 A
Maximum Heater-Cathode Voltage:
Heater Positive with Respect to Cathode
1. DC Component .............................. 100 V
2. Total DC and Peak ......................... 200 V
Heater Negative with Respect to Cathode
Total DC and Peak ............................ 200 V
Direct Interelectrode Capacitances (approx):
Pentode
Input .................. 16.0 pf
Output .................. 9.0 pf
Grid to Plate ........... 0.5 pf
Direct Interelectrode Capacitances (approx):
Triode
Input ................... 7.0 pf
Output .................. 2.0 pf
Grid to Plate ........... 6.0 pf
Maximum Ratings (Design Center Values):
Pentode
Plate Voltage ........... 400 V
Grid No. 2 Voltag........ 300 V
Plate Dissipation......... 14 W
Grid No. 2 Dissipatio... 2.75 W
Cathode Current ......... 260 mA
Grid No. 1 Circuit Resistance
Fixed Bias .............. 1M Ù
Self Bias ............... 2.2M Ù
Maximum Ratings (Design Center Values):
Triode
Plate Volta.................................. 400 V
Negative Grid No. 1 Voltage..................-400 V
Plate Dissipation ........................... 2.5 W
Cathode Current ............................. 105 mA
Grid No. 1 Circuit Resistance
Self Bias ................................... 2.2M Ù
Characteristics and Typical Operation:
Triode Class A Amplifier
Plate Voltage ................ 250 V
Grid No. 1 Voltage ............ -4 V
Amplification Factor .......... 58
Plate Resistance (approx)...... 16K Ù
Transconductance ............ 3600 µ
Plate Current ................ 2.3 mA
Grid No. 2 Current (Maximum Signal) ........... -6.6 mA
Characteristics and Typical Operation:
Pentode Class A Amplifier
Plate Voltage .................................... 135 V
Grid No. 2 Voltage ............................. 120 V
Grid No. 1 Voltage ............................. -10 V
Plate Resistance (approx) ...................... 12K Ù
Transconductance .............................. 9300 µ
Plate Current ................................... 56 mA
Grid No. 2 Current (Zero Signal) ............... 3.0 mA
Grid No. 2 Current (Maximum Signal) ............ -30 mA
Characteristics and Typical Operation:
Vert Deflection Amplifier
DC Plate Supply Voltage ....................... 400 V
Peak Positive-Pulse Plate Voltage ............ 2500 V
DC Grid No. 2 Voltage ......................... 300 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 250 V
Average Cathode Current ........................ 75 mA
Peak Cathode Current .......................... 260 mA
Plate Dissipation .............................. 14 W
Grid No. 2 Dissipation ....................... 2.75 W