S2P21

Special-quality directly heated beam tetrode for battery-powered VHF amplification, producing several watts of RF output to approximately 200 MHz with severe-service ruggedness.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 2.5 V / 460 mA

Description

Special-quality directly heated beam tetrode for battery operation and RF power amplification to 200 Mc/s.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: -
Nominal heater voltage: 2.5 V
Nominal heater current: 460 mA
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

Beam Power

X-ray radiationInterelectrode capacitances

Max plate voltage: 150 V
Max screen voltage: 150 V
Max plate dissipation: 5 W
Max screen dissipation: 2 W

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

1961 AEI Industrial Valves

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

RF power output single-ended
2.9 W
RF power output parallel or push-pull
5.8 W
Maximum operating frequency
200 MHz

Data set 02

1961 Associated Electrical Industries

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Maximum operating frequency
200 MHz
Maximum shock
500 g
ShortDuration
Maximum acceleration
2.5 g
Continuous

Capacitance

Anode-grid capacitance
0.13 pF
Maximum