NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

9A8
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9DCEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 8A8
Substitutes ................................... 9EA8 9U8
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used as combined oscillator and mixer tubes in vhf tv receivers. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
EIA Outline ................................... 6-2
EIA Base ...................................... 9DC

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 9 V
Heater Current ................................ 0.3 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 175 V
Plate Dissipation ............................. 1.7 W
Grid No. 2 Dissipation ........................ 0.5 W

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1.5 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 20
Transconductance .............................. 5000 µMho
Plate Current ................................. 14 mA

Pentode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 170 V
Grid No. 2 Voltage ............................ 170 V
Grid No. 1 Voltage ............................ -2 V
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 6200 µMho
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 2.8 mA

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 09 Aug 2022 08:01:04 -0700