NJ7P SQL Tube Database Query

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7059
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

Application

Miniature type used as a combined oscillator and mixer in mobile communications equipment. Requires miniature 9-contact socket.

Mechanical Data

EIA Outline ................................... 6-2
EIA Base ...................................... 9AE

Electrical Data

Heater Voltage ................................ 12-15 V
Heater Current ................................ 0.195 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 5 pf
Output ........................................ 2.5 pf
Grid to Plate ................................. 0.15 pf

Triode
Input ......................................... 2.7 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.7 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.8 W
Grid No. 2 Dissipation ........................ 0.5 W

Triode
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.5 W

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Plate Resistance (approx) ..................... 4.7K Ω
Transconductance .............................. 8500 µ
Plate Current ................................. 18 mA

Pentode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 5200 µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 3.5 mA

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

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

Sat, 25 Mar 2023 04:52:20 -0700