NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

814
Beam Power Pentode

EIA Base & Outline

EIA Base: 5J
Source ........................................ RCA TT-5 - 1962

Application

Thoriated-tungsten-filament type used as rf power amplifier and oscillator. Requires small five-contact socket and may be operated in vertical position base down, or in horizontal position with pins 2 and 4 in vertical plane.

Mechanical Data

EIA Base ...................................... 5J

Electrical Data

Heater Voltage ................................ 10 V
Heater Current ................................ 3.25 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 13.5 pf
Output ........................................ 13.5 pf
Grid to Plate ................................. 0.1 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 1500 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 65 W
Grid No. 2 Dissipation ........................ 10 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 1500 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -90 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 24 mA
Driving Power ................................. 1.5 W
Power Output (approx) ......................... 160 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 1250 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 145 mA
Grid No. 2 Current ............................ 20 mA
Driving Power ................................. 3.2 W
Power Output (approx) ......................... 130 W

Class C Modulated Amplifier (Grid)
Plate Voltage ................................. 1500 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -120 V
Grid No. 1 Current ............................ 2.5 mA
Plate Current ................................. 60 mA
Grid No. 2 Current ............................ 3.0 mA
Driving Power ................................. 4.2 W
Power Output (approx) ......................... 35 W

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 16 Aug 2022 01:07:17 -0700