NJ7P SQL Tube Database Query

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7355
Power Pentode

EIA Base & Outline

Application

Glass octal type used in power-output stage of high-fidelity audio-frequency amplifier systems. Requires octal socket.

Mechanical Data

EIA Base ...................................... 8KN

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.8 A

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 400 V
Plate Dissipation ............................. 18 W
Grid No. 2 Dissipation ........................ 3.5 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 225 V
Grid No. 1 Voltage ............................ -15 V
Peak Grid No. 1 Voltage........................ 15 V
Plate Resistance (approx) ..................... 42K Ω
Transconductance .............................. 7600 µ
Plate Current (Zero Signal) ................... 62 mA
Plate Current (Maximum Signal) ................ 74 mA
Grid No. 2 Current (Zero Signal) .............. 3.2 mA
Grid No. 2 Current (Maximum Signal) ........... 16.5 mA
Load Resistance ............................... 2500 Ω
Power Output (approx) ......................... 9 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -21 V
Peak Grid No. 1 Voltage........................ 42 V
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 185 mA
Grid No. 2 Current (Zero Signal) .............. 5.5 mA
Grid No. 2 Current (Maximum Signal) ........... 24 mA
Load Resistance ............................... 4000 Ω
Power Output (approx) ......................... 28.5 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -34 V
Peak Grid No. 1 Voltage........................ 60 V
Plate Current (Zero Signal) ................... 56 mA
Plate Current (Maximum Signal) ................ 175 mA
Grid No. 2 Current (Zero Signal) .............. 3.5 mA
Grid No. 2 Current (Maximum Signal) ........... 24 mA
Load Resistance ............................... 5000 Ω
Power Output (approx) ......................... 40 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

Fri, 09 Dec 2022 05:08:33 -0700