NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

1D8GT
Diode - Triode - Power Pentode

EIA Base & Outline

EIA Base: 8AJEIA Bulb: 9-17

Substitute Data

Preferred Substitutes ......................... 1B8
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used in compact battery-operated receivers. Diode unit is used as detector or avc tube, triode as first audio amplifier, and pentode as power output tube. Tube requires octal socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Octal
EIA Outline ................................... 9-17
EIA Base ...................................... 8AJ

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 1.4 DC V
Heater Current ................................ 0.1 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V

Triode
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -9 V
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 925 µMho
Plate Current ................................. 5.0 mA
Grid No. 2 Current ............................ 1.0 mA
Load Resistance ............................... 12K Ω
Power Output (approx) ......................... 0.2 W

Pentode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -6 V
Transconductance .............................. 875 µMho
Plate Current ................................. 3.8 mA
Grid No. 2 Current ............................ 0.8 mA
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 0.1 W

Pentode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 45 V
Grid No. 2 Voltage ............................ 45 V
Grid No. 1 Voltage ............................ -4.5 V
Transconductance .............................. 650 µMho
Plate Current ................................. 1.6 mA
Grid No. 2 Current ............................ 0.3 mA
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 0.035 W

Triode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 43.5K Ω
Transconductance .............................. 575 µMho
Plate Current ................................. 1.1 mA

Triode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 67.5 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 55K Ω
Transconductance .............................. 450 µMho
Plate Current ................................. 0.6 mA

Triode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 45 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 77K Ω
Transconductance .............................. 325 µMho
Plate Current ................................. 0.3 mA

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 25 Mar 2023 03:38:45 -0700