12DK5

Remote-cutoff miniature pentode for automobile-receiver IF and RF amplification, optimized for low plate voltage and automatic-volume-control operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B9A
Base pins: 9
Nominal heater: 12.6 V / 300 mA

Description

V%stinghouse RELIATRON® tusss 12DK5 October 29, 1956 RF and IF Pentode Type 12DK5 The 12DK5 is a 9-pin ministure pentode designed for service as an intermediate frequency amplifier in sutomoblle receivers with a transistor output stage whose driving power is taken from the diode detector, The 12DK5 may also be used as a radio frequency amplifier since it features high transconductance at low plate and grid 2 voltages and low grid l-plate capacity, The cutoff chsrscter- istics of the 12DXK5 are especially suitable for ave operation, GENERAL DATA Blectrical: Cathode. * @ o o & 5 o & o & e & » Coated Unipotential Heater: o Voltagey v « « « o o o « o 12,6 Volts Current, , « v ¢« ¢ ¢ ¢ = & 0,3 Ampere Direct Interelectrode Capacitances (shielded) :# Grid to Plate. e & @ * 3 @ o 5 & e » 00045 uuf Inputo . ) e L] [J - . L) L] L] * » . [ » 905 uuf Ou—tput---.--o..-..... 2.65 uuf Mechaenical: Blllboo'-o-— ooaoc.l’ou.T_é'-l/z - L] Base. ] L] * * * LJ Miniature 9-pin (JETEC E9-1) o L] ° Basing, .

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: 9
Nominal heater voltage: 12.6 V
Nominal heater current: 300 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

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 100000 Ω
Transconductance: 0.0033 S
Max plate voltage: 16 V
Max screen voltage: 16 V

Source-derived physical section; applicable promoted ratings are populated from the printed 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

1947 Westinghouse

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

plate and grid
2 V
plate and grid 2 voltages and low grid l-plate capacity, The cutoff chsrscter-

Other

Voltagey v « « « o o o « o
6 V
Voltagey v « « « o o o « o 12,6 Volts
Current, , « v ¢« ¢ ¢ ¢ = &
3 A
Current, , « v ¢« ¢ ¢ ¢ = & 0,3 Ampere
Grid to Plate. e & @ *
45 pF
Grid to Plate. e & @ * 3 @ o 5 & e » 00045 uuf
Inputo . ) e L] [J - . L) L] L] * » . [ »
905 pF
Inputo . ) e L] [J - . L) L] L] * » . [ » 905 uuf
Ou—tput---.--o
2.65 pF
Ou—tput---.--o..-..... 2.65 uuf
Plate L] * - * Ld bd * . . - - L] [
16 V
Plate L] * - * Ld bd * . . - - L] [4 . . 16 max. Volts
Screen Voltage. v v v o v o o o o «
16 V
Screen Voltage. v v v o v o o o o « 16 max. Volts
Heater-Cethode Voltage,
16 V
Heater-Cethode Voltage, . . . . . . 16 max, Volts
Grigé
1 V
Grigé 1 Voltage
Plate Voltage. v o o o o
6 V
Plate Voltage. v o o o o 4 o o o o & 12, 6 Volts
Grid
0 V
Grid 3 (suppressor) Voltage, . . . . 0 Volts
Grid
6 V
Grid 2 (Screen) Voltsge. o v o o « » 12,6 Volts
Plate Resistence
100000 ohm
Plate Resistence . . . . .. . . . . 100,000 Ohms
Grid Leak Resistor (Bypassed),
2.2 Mohm
Grid Leak Resistor (Bypassed), . . . 2.2 Megohms
Grid Voltsge for I,
2.5 V
Grid Voltsge for I, 10 ua, ., ., . . 2.5 Volts
When used in automative service from »
12 V
When used in automative service from » 12 volt source under no circum-
stances should the hester voltage be less than
10 V
stances should the hester voltage be less than 10.0 volts or more than
15.9 volts, These extreme varistions in heater voltage may he tolerate
15.9 V
15.9 volts, These extreme varistions in heater voltage may he tolerated