SRS503

RFT transmitting pentode for professional RF amplification to approximately 50 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 3 A

Description

SRS503 is a radiation-cooled transmitting pentode intended for communications. The source publishes heater data, static characteristics, operating examples, limiting ratings, capacitances, and mechanical or cooling requirements as applicable.

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: 12.6 V
Nominal heater current: 3 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

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.0035 S
Max plate voltage: 2000 V
Max screen voltage: 450 V
Max plate dissipation: 120 W
Max screen dissipation: 15 W
Max cathode current: 800 mA

Promoted ratings/characteristics are source-published values; additional published values and operating examples are preserved in the parameter table.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
12.6 V
Nominal
HeaterCurrentNominal
3 A
Nominal
Maximum Plate Voltage
2000 V
Maximum Screen Voltage
450 V
Maximum Plate Dissipation
120 W
Maximum Screen Dissipation
15 W
Maximum Cathode Current
200 mA
Maximum Frequency
50 MHz

Characteristic

Transconductance
3500 µS
Typical