5961

Industrial pentagrid converter for oscillator and mixer service in communications or specialized receiving equipment. Its multi-grid construction provides frequency conversion with high plate resistance and conventional operating voltages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8R
Socket code: -
Base pins: 8
Nominal heater: 6.3 V / 300 mA

Description

Pentagrid converter identified as a special 6SA7 type, with converter operating characteristics.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8R
Socket code: -
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8R - 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

Heptode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Max plate voltage: 300 V
Max screen voltage: 100 V

Pentagrid converter; published 450-uS conversion transconductance retained as a parameter rather than promoted as ordinary transconductance.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

Plate Voltage
250 V
Converter
Screen Voltage
100 V
Converter
Grid Voltage
-2 V
Converter
Plate Current
3.5 mA
Converter
Screen Current
8.5 mA
Converter
Conversion Transconductance
450 uS
Converter