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15BD11A
High-Mu Triode - Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 12DPEIA Bulb: 9-58

Substitute Data

Preferred Substitutes ......................... 15AF11 15AF11A
Source ........................................ RCA RC-29 - 1975

Application

Duodecar type used in television receiver applications. The high-mu triode unit is used for agc keyer service, the medium-mu triode unit for sync separator service, and the pentode unit for video amplifier service. Requires duodecar 12-contact socket.

Mechanical Data

EIA Outline ................................... 9-58
EIA Base ...................................... 12DP

Electrical Data

Heater Voltage ................................ 14.7 V
Heater Current ................................ 0.45 A

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 4 W
Grid No. 2 Dissipation ........................ 1.1 W

Triode 1
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.5 W

Triode 2
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 2 W

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 100 Ω
Plate Resistance (approx) ..................... 45K Ω
Transconductance .............................. 10400 µMho
Plate Current ................................. 17 mA
Grid No. 2 Current ............................ 4 mA

Triode 1 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 220 Ω
Amplification Factor .......................... 41
Plate Resistance (approx) ..................... 9400 Ω
Transconductance .............................. 4400 µMho
Plate Current ................................. 9.2 mA

Triode 2 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -2.0 V
Amplification Factor .......................... 68
Plate Resistance (approx) ..................... 12.4K Ω
Transconductance .............................. 5500 µMho
Plate Current ................................. 7 mA

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Sat, 25 Jun 2022 09:58:40 -0700