Color Television Type..12AZ7A

GROUNDED GRID AMPLIFIER

Double High Mu Triode

Construction ..............................Miniature T-6 1/2
Base ......................................Button 9 Pin E9-1
Basing ...................................................9A
Outline .................................................6-2
  Maximum Diameter ................................0.875 In.
  Maximum Seated Height ...........................1.937 In.
  Maximum Overall Height ..........................2.187 In.

ELECTRICAL DATA.

 HEATER OPERATION

  Heater Voltage .............................12.6/6.3 Volts
  Heater Current ..............................225/45D Ma
  Heater Warm-up Time ..............................11 Seconds
  Maximum Heater-Cathode Voltage ...................90 Volts

 DIRECT INTERELEClRODE CAPACITANCES .....  Shield    Unshielded

  Grid to Plate (Each Section) ..........   1.9       1.9 Pf
  Input (Each Section) ..................   3.2       3.1 Pf
  Output (Section l) [2] ................   1.3       0.5 Pf
  Output (Section 2) ....................   1.6       0.4 Pf

 Grounded Grid Operatlon

  Input (Each Section) ..................   7.0       6.9 Pf
  Output (Section 1) [2] ................   2.8       2.0 Pf
         (Section 2) ....................   3.2       2.0 Pf
  Plate to Cathode ......................  0.23      0.24 Pf

 RATINGS (Design Center Rating System)

  Plate Voltage (Max.) .............................. 300 Volts
  Plate Dissipation (Max.) ...........................2.5 Watts
  Negative Grid Voltage (Max) .........................50 Volts
  Grid Circuit Resistance 
   Fixed Bias (Max.) ................................0.25 Megohm
   Self Bias (Max.) .................................1.0  Megohm

CHARACTERISTICS AND TYPICAL OPERATION
Class A1 Amplifier (Each Sectlon)

 Plate Voltage ..........................   100       250 Volts
 Cathode Bias Resistor ..................   270       200 Ohms
 Plate Current ..........................   3.7        10 Ma
 Transconductance .......................  4000      5500 umhos
 Amplification Factor ...................    60        60
 Plate Resistance ....................... 15000     10900 Ohms
 Ecl for Ib = 10 uA (Approx.) ...........    -5       -12 Volts

NOTES:
[1] Shield No. 315.
[2] Section 1 connects to pins 6,7 and 8.