Coler Television type
     12BH7A : VERTICAL or HORIZ. DEFLECTION OSCILLATOR
              and AMPLIFIER

Double Low Mu Triode

Construction .............................. Miniature T-61/2
Base ..................................... Button 9 Pin E9-1
Basing................................................... 9A
Outline ................................................ 6-3
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 ............................. 300/600 Ma
 Heater Warm-up Timem ............................ 11 Seconds
 Maximum Heater-Cathode Voltage
  Heater Negative with Respect to Cathode
   Total DC and Peak............................. 200 Volts
 Heater Positive with Respect to Cathode
  DC ............................................ 100 Volts
  Total DC and Peak.............................. 200 Volts

 DIRECT INTERELECTRODE CAPACITANCES (Unshielded)
                                    Section 1 [2]       Section 2
 Grid to Plate ........................  2.6         2.6 Pf
 Input ................................  3.2         3.2 Pf
 Output ...............................  0.5         0.4 Pf
 Plate to Plate .......................         0.8      Pf

RATINGS (Design Center Rating System)
                                          Vertical
                                          Deflection    Class A1
                                          Amplifier     Amplifler

Plate Voltage (Max.) ......................  450           300 Volts
Peak Positive Plate Voltage (Abs. Max.) ... 1500             - Volts
Plate Dissipation (Each Plate) (Max.) .....  3.5           3.5 Watts
Peak Negative Pulse Grid Voltage (Max.) ...  250             - Volts
Average Cathode Current (Each Section) ....   20            20 Ma
Peak Cathode Current (Max.) ...............   70             - Ma
Grid Circuit Resistance
  Fixed bias (Max.) .......................    -          0.25 Megohm
  Cathode Bias (Max.) .....................  2.2          1.0  Megohms


                                         Vertical[3]    Horizontal
                                         Deflection     Deflection
                                         Oscillator     Oscillator

DC Plate Voltage (Max.) ...................  450           450 Volts
Plate Dissipation
 Each Plate (Max.) ........................  3.5           3.5 Watts
 Both Plates (Max.) .......................  7.0           7.0 Watts
Peak Negative Grid Voltage (Max.) .........  400           600 Volts
Average Cathode Current (Max.) ............   20            20 Ma
Peak Cathode Current (Max.) ...............   70           300 Ma
Grid Circuit Resistance (Max.) ............  2.2           2.2 Megohms

 CHARACTERISTICS AND TYPICAL OPERATION
 Class A1 Amplifier

Plate Voltage ........................................     250 Volts
Grid Voltage .........................................   -10.5 Volts
Plate Current ........................................    11.5 Ma
Transconductance .....................................    3100 uhos
Amplification Facior .................................    16.5
Grid Voltage for Ib = 50 uA ..........................     -23 Volts
Plate Resistance (Approx.) ...........................    5300 Ohms

NOTES:

 [1] Applies to parallel connection only.
 [2] Section 1 connects to pins 6, 7, and 8.
 [3] For operation in a 525 line, 30 frame system as described in 
     "Standards of Good Engineering Practice for Television Broadcast
     Stations; Federal Communications Commission," the duty cycle of 
     the voltage pulse must not exceed 15% of one horizontal scanning
     cycle.