NJ7P SQL Tube Database Query

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1623
Power Triode

EIA Base & Outline

Application

Requires small 4-contact socket and may be operated in vertical position

Thoriated-tungsten-filament type used as af power amplifier and as rf power amplifier and oscillator. May be used with full up to 60 MHz and with reduced input up to 100 MHz.

Mechanical Data

Bulb .......................................... ST-19
Base Type ..................................... Medium 4-Pin Ceramic Bayonet
Maximum Overall Height ........................ 6-9/16 In.
Maximum Diameter .............................. 2-7/16 In.
EIA Base ...................................... 3G
Top Cap ....................................... Medium Metal

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 2.5 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 5.7 pf
Output ........................................ 0.9 pf
Grid to Plate ................................. 6.7 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 1000 V
Plate Input ................................... 100 W
Plate Dissipation ............................. 30 W
Plate Current ................................. 100 mA

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -90 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 100 mA
Driving Power ................................. 3.1 W
Power Output (approx) ......................... 75 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 750 V
Grid No. 1 Voltage ............................ -125 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 100 mA
Driving Power ................................. 4.0 W
Power Output (approx) ......................... 55 W

Push Pull Class B Amplifier
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -40 V
Peak Grid No. 1 Voltage........................ 230 V
Plate Current (Zero Signal) ................... 30 mA
Plate Current (Maximum Signal) ................ 200 mA
Driving Power ................................. 4.2 W
Load Resistance ............................... 12K Ω
Power Output (approx) ......................... 145 W

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

Thu, 18 Aug 2022 09:19:03 -0700