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A horizontal ribbon.

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A horizontal ribbon.

5894A
Twin Beam Power Pentode

EIA Base & Outline

EIA Base: 5894B

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 ......................................... 6.7 pf
Output ........................................ 2.1 pf
Grid to Plate ................................. 0.08 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 40 W
Grid No. 2 Dissipation ........................ 7 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -80 V
Grid No. 1 Current ............................ 2 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 16 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 80 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -100 V
Grid No. 1 Current ............................ 8 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 24 mA
Driving Power ................................. 1.2 W
Power Output (approx) ......................... 85 W

A horizontal ribbon.

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A horizontal ribbon.

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Wed, 08 Dec 2021 22:12:38 -0700