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P5521E

Special-purpose pulse tetrode in the 715B family, optimized for extreme high-voltage pulsed operation with approximately 20 kV plate capability and 15 A peak anode current.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 26 V / 2 A

Description

Special-purpose pulse tetrode equivalent to American type 715B.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 26 V
Nominal heater current: 2 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 20000 V
Max screen voltage: 1250 V
Max plate dissipation: 60 W
Max screen dissipation: 8 W
Max grid dissipation: 1 W

Published ratings/characteristics promoted where applicable.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Input capacitance
375 pF
Published datasheet value
Output capacitance
75 pF
Published datasheet value
Anode-grid capacitance
2 pF
Published datasheet value
Maximum peak anode current
15 A
Published datasheet value
Maximum negative grid voltage
1 kV
Published datasheet value
Maximum peak positive grid voltage
300 V
Published datasheet value
Maximum peak grid current
2 A
Published datasheet value

Data set 02

1947 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Maximum average anode current
30 mA
Maximum peak anode current
15 A
DutyCycle<=0.001
Maximum positive control-grid voltage
250 V
Pulse
Maximum negative grid bias
-1000 V

Capacitance

Grid-anode capacitance
1.2 pF
Input capacitance
35 pF
Output capacitance
7 pF