NJ7P SQL Tube Database Query

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815
Twin Beam Power Pentode

EIA Base & Outline

Application

Heater-cathode type used as af power amplifier and modulator and as rf power amplifier and oscillator. Requires octal socket and may be operated in any position.

Mechanical Data

EIA Base ...................................... 8BY

Electrical Data

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

Direct Interelectrode Capacitances (approx)

Each Pentode
Input ......................................... 13.3 pf
Output ........................................ 8.5 pf
Grid to Plate ................................. 0.2 pf

Maximum Ratings (Design Center Values)

Each Pentode
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 200 V
Plate Dissipation ............................. 25 W
Grid No. 2 Dissipation ........................ 4 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -45 V
Grid No. 1 Current ............................ 2.5 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 17 mA
Driving Power ................................. 0.13 W
Power Output (approx) ......................... 56 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 175 V
Grid No. 1 Voltage ............................ -45 V
Grid No. 1 Current ............................ 3 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 15 mA
Driving Power ................................. 0.16 W
Power Output (approx) ......................... 45 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -15 V
Peak Grid No. 1 Voltage........................ 32 V
Plate Current (Zero Signal) ................... 22 mA
Plate Current (Maximum Signal) ................ 150 mA
Driving Power ................................. 0.36 W
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 54 W

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

Thu, 29 Sep 2022 01:55:23 -0700