NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

832
Twin Beam Power Tube

EIA Base & Outline

EIA Base: 7BP

Application

Heater-cathode type having midtapped heater used as rf power amplifier and oscillator. Requires septar seven-contact socket and may be operated in any position. Plate dissipation is per section.

Mechanical Data

EIA Base ...................................... 7BP

Electrical Data

Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 1.6/0.8 A

Direct Interelectrode Capacitances (approx)

Each Pentode
Input ......................................... 7.5 pf
Output ........................................ 3.8 pf
Grid to Plate ................................. 0.05 pf

Maximum Ratings (Design Center Values)

Each Pentode
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 15 W
Grid No. 2 Dissipation ........................ 5 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -65 V
Grid No. 1 Current ............................ 2.6 mA
Plate Current ................................. 72 mA
Grid No. 2 Current ............................ 14 mA
Driving Power ................................. 0.18 W
Power Output (approx) ......................... 26 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 425 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -60 V
Grid No. 1 Current ............................ 2.4 mA
Plate Current ................................. 52 mA
Grid No. 2 Current ............................ 16 mA
Driving Power ................................. 0.15 W
Power Output (approx) ......................... 16 W

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 24 May 2022 01:27:32 -0700