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6JA5
Beam Power Pentode

Base & Bulb ( GE - 1973)

Mechanical Data

Bulb .......................................... T-12
Outline ....................................... 12-57
EIA Base ...................................... 12EV

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.0 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 14 pf
Output ........................................ 7.5 pf
Grid to Plate ................................. 0.66 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 19 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -10 V
Plate Resistance (approx) ..................... 12K Ω
Transconductance .............................. 10300 µ
Plate Current ................................. 95 mA
Grid No. 2 Current ............................ 4.2 mA

Characteristics and Typical Operation

Hortz Defl Amplifier
DC Plate Supply Voltage ....................... 135 V
Peak Negative-Pulse Plate Voltage ............. 125 V
DC Grid No. 3 Voltage ......................... 2500 V
DC Grid No. 2 Voltage ......................... -10 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 95 V
Average Cathode Current ....................... 110 mA

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