NJ7P SQL Tube Database Query

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1DY4
Triode

EIA Base & Outline

EIA Base: 7DKEIA Bulb: 5-2

Substitute Data

Preferred Substitutes ......................... 1DY4A
Source ........................................ GE - 1975

Mechanical Data

Source ........................................ GE - 1975
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature 7-pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7DK

Electrical Data

Source ........................................ GE - 1975
Heater Voltage ................................ 1.6 V
Heater Current ................................ 0.6 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ GE - 1975
Input ......................................... 3.5 pf
Output ........................................ 1.15 pf
Grid to Plate ................................. 2.0 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ GE - 1975
Plate Voltage ................................. 135 V
Plate Dissipation ............................. 1.5 W
Grid No. 2 Dissipation ........................ W
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. Ω
Self Bias .................................. Ω
Bulb Temperature (At Hottest Point) ........... °C

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE - 1975
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ *180 V
Amplification Factor .......................... 28
Transconductance .............................. 11K µMho
Plate Current (Zero Signal) ................... 10.4 mA
Plate Current (Maximum Signal) ................ mA
Grid No. 2 Current (Zero Signal) .............. mA
Grid No. 2 Current (Maximum Signal) ........... mA
Grid No. 1 Voltage for Ib ..................... µa @ V
Driving Power ................................. W
Load Resistance ............................... Ω
Power Output (approx) ......................... W
Maximum Frequency ............................. MHz
Total Harmonic Distortion ..................... %

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(c) 1994-2021 by William A. Beech, NJ7P

Sat, 02 Jul 2022 22:14:35 -0700