NJ7P SQL Tube Database Query

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5894B
Twin Beam Power Pentode

EIA Base & Outline

Application

Requires septar seven-contact socket and may be operated in vertical position, base up or down, or horizontal position with palte terminals in horizontal plane.

Small, heater-cathode type used for af and rf power amplifier and oscillator, and for frequency multiplier service at frequencies up to 500 MHz.

Mechanical Data

EIA Base ...................................... 5894B

Electrical Data

Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 1.8/0.9 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 11.6 pf
Output ........................................ 3.7 pf
Grid to Plate ................................. 0.08 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 40 W
Grid No. 2 Dissipation ........................ 7 W

Characteristics and Typical Operation

Class B Amplifier
Plate Voltage ................................. 450 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage ............................ -25 V
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 26 mA
Power Output (approx) ......................... 86 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -80 V
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 16 mA
Power Output (approx) ......................... 90 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -80 V
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 20 mA
Power Output (approx) ......................... 71 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

Mon, 06 Feb 2023 19:25:59 -0700