12JN6A

Compactron beam-power pentode intended primarily for television horizontal-deflection amplification, a 12.6 V heater counterpart of the 6JN6A design.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 12FK
Socket code: B12C
Base pins: 12
Nominal heater: 12.6 V / 600 mA

Description

The 12JN6A is a Compactron beam-power pentode intended primarily as a television horizontal-deflection amplifier. Its supplied registration sheet gives the 12 V, 0.6 A heater data and states that other characteristics are identical to 6JN6A.

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12FK
Socket code: B12C
Base pins: 12
Nominal heater voltage: 12.6 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12FK - 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

Transconductance: 0.0073 S
Amplification factor: 4.4
Max plate voltage: 770 V
Max screen voltage: 220 V
Max plate dissipation: 17.5 W
Max screen dissipation: 3.5 W
Max cathode current: 550 mA

Approved sheet publishes only heater characteristics plus equivalence to 6JN6A; other electrical ratings intentionally not inferred from an absent reference sheet.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater current tolerance
560 mA to 640 mA

Characteristics

Heater warm-up time
11 s

Data set 02

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

Grid-to-plate capacitance
0.34 pF
Unshielded grid 1 to plate; Sylvania 1970
Input capacitance
16 pF
Unshielded input; Sylvania 1970
Output capacitance
7 pF
Unshielded output; Sylvania 1970

Other

Peak positive pulse plate voltage
6500 V
Peak positive plate pulse; Sylvania 1970
Peak negative pulse plate voltage
-1500 V
Peak negative plate pulse; Sylvania 1970
Positive DC beam-plate voltage
70 V
Positive DC beam plate; Sylvania 1970
Average cathode current
175 mA
Maximum average cathode current; Sylvania 1970
Plate voltage
250 V
Typical plate voltage; Sylvania 1970
Grid #2 voltage
150 V
Typical screen voltage; Sylvania 1970
Grid #1 voltage
-22.5 V
Typical control-grid voltage; Sylvania 1970
Plate current
70 mA
Typical plate current; Sylvania 1970
Grid #2 current
2.4 mA
Typical screen current; Sylvania 1970
Plate voltage
55 V
Instantaneous knee; screen=150 V, control grid=0 V; Sylvania 1970
Plate current
345 mA
Instantaneous knee; plate=55 V; Sylvania 1970
Grid #2 current
30 mA
Instantaneous knee; plate=55 V; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
Heater negative relative to cathode, DC and peak; Sylvania 1970
Peak Heater-Cathode Voltage
100 V
Heater positive relative to cathode, DC; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
Heater positive relative to cathode, DC and peak; Sylvania 1970