1632

Low-voltage beam-power output tube related to the 25L6 family, documented for Class-A1 audio service with approximately 2.1 watts output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 7AC
Socket code: B9A
Base pins: 7
Nominal heater: 12.6 V / 600 mA

Description

The 1632 is a beam power output tube similar to the 25L6 but adapted for a 12.6 V heater and different dissipation ratings. The published Class-A1 point uses low supply voltage and gives about 2.1 W output.

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: 7AC
Socket code: B9A
Base pins: 7
Nominal heater voltage: 12.6 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

7AC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Pin 1	—	NC	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN2Pin 2	—	H — Heater	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN3Pin 3	A	P — Plate (Anode)	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN4Pin 4	A	G2 — Screen Grid	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN5Pin 5	A	G1 — Control Grid	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN7Pin 7	—	H — Heater	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN8Pin 8	A	BP — Beam-Forming PlateGroup AC8	Verified 12L6GT/25L6GT manufacturer basing, 7AC
PIN8Pin 8	A	K — CathodeGroup AC8	Verified 12L6GT/25L6GT manufacturer basing, 7AC

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 13000 Ω
Transconductance: 0.009 S
Max plate voltage: 117 V
Max screen voltage: 117 V
Max plate dissipation: 5.5 W
Max screen dissipation: 1.25 W

Promoted from printed maximum-rating/characteristic columns; additional published values retained in TUBE_SECTION_PARAMETER.

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

Beam Power

Other

Plate voltage
110 V
ClassA
Screen voltage
110 V
ClassA
Control-grid voltage
-7.5 V
ClassA
Plate current
49 mA
ClassA
Screen current
4 mA
ClassA
Load resistance
2000 Ω
ClassA
Power output
2.1 W
ClassA

Characteristic

Plate resistance
13000 Ω
ClassA
Transconductance
9000 µS
ClassA

Data set 02

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Screen supply
110 V
ClassA1
Screen current
4 mA
ClassA1
Plate current
49 mA
ClassA1
Power output
2.1 W
ClassA1