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Voltage Radio Detector Converter ·Diode-Pentode

6EQ7

Diode-pentode combination integrating signal rectification with voltage amplification. The pentode supplies useful receiver gain while the diode provides a complementary detector or control-voltage function.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 9LQ
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

Diode sharp-cutoff pentode with separate cathodes, intended for combined diode and pentode service.

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: 9LQ
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9LQ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max cathode current: 1 mA
Rectifier max heater-cathode voltage: 200 V
Rectifier warm-up time: 11 s

Published promoted fields populated from the printed semantic headings.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 500000 Ω
Transconductance: 0.0022 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.5 W
Max grid dissipation: 0.2 W
Rectifier max heater-cathode voltage: 200 V
Rectifier warm-up time: 11 s

Published promoted fields populated from the printed semantic headings.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

Heater Voltage (£10%).......... 20 12.6 6.3 Volts
6.3 V
Heater Voltage (£10%).......... 20 12.6 6.3 Volts
Heater Current. .. ............... 100 150 300 Ma
300 mA
Heater Current. .. ............... 100 150 300 Ma
Output: p to (h+Pk,g3,1.8.4g2). ................... 5.0 uuf
5 pF
Output: p to (h+Pk,g3,1.8.4g2). ................... 5.0 uuf
Plate Voltage. . .......................... 100 Volts
100 V
Plate Voltage. . .......................... 100 Volts
Grid No.2 Voltage. . . ... .. 100 Volts
100 V
Grid No.2 Voltage. . . ... .. 100 Volts
Grid No.1 Voltage!
1 V
Grid No.1 Voltage!
Plate Current. . ....... ... ... ... .. i 9.0 Ma
9 mA
Plate Current. . ....... ... ... ... .. i 9.0 Ma
Grid No. 2 Current. ....... ... ... ., 3.5 Ma
3.5 mA
Grid No. 2 Current. ....... ... ... ., 3.5 Ma
Transconductance. . . .......... ... ... .. it 3800 umhos
3800 umhos
Transconductance. . . .......... ... ... .. it 3800 umhos
Plate Resistance (approx.)........................... 250,000 Ohms
250 Ohms
Plate Resistance (approx.)........................... 250,000 Ohms
Average Diode Current with 10 Volts
10 V
Average Diode Current with 10 Volts

Other

Plate Voltage. . . ........ ... . i, 300 Volts Max.
300 V
Plate Voltage. . . ........ ... . i, 300 Volts Max.
Grid No. 3 Voltage (Positive or Negative). ............ 300 Volts Max.
300 V
Grid No. 3 Voltage (Positive or Negative). ............ 300 Volts Max.
Grid No. 2 Supply Voltage. . ... ..................... 300 Volts Max.
300 V
Grid No. 2 Supply Voltage. . ... ..................... 300 Volts Max.
Grid No. 2 Voltage. ..............c.. ., See 6AM8 Rating Chart
2 V
Grid No. 2 Voltage. ..............c.. ., See 6AM8 Rating Chart
Positive Grid No. 1 Voltage. ... ..................... 0 Volts Max.
0 V
Positive Grid No. 1 Voltage. ... ..................... 0 Volts Max.
Negative Grid No. 1 Voltage.. . ...................... 50 Volts Max.
50 V
Negative Grid No. 1 Voltage.. . ...................... 50 Volts Max.
Plate Dissipation...... ... ... ... ... .. ... ......... 3.0 Watts Max.
3 W
Plate Dissipation...... ... ... ... ... .. ... ......... 3.0 Watts Max.
Diode Plate Current. . .......... .. ... .. ... ... ...... 3.0 Ma Max.
3 mA
Diode Plate Current. . .......... .. ... .. ... ... ...... 3.0 Ma Max.

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 2

Pentode

Characteristic

PentodeTransconductance
2200 uS
Section2

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

Plate voltage
10 V
DiodeUnit
Plate current
2 mA
DiodeUnit

Other

Maximum plate current
1 mA
DiodeUnit

SECTION 2

Pentode

Other

Plate voltage
100 V
ClassA1;PentodeUnit
Grid 2 voltage
100 V
ClassA1;PentodeUnit
Grid 1 resistor, bypassed
2.2 Mohm
ClassA1;PentodeUnit
Plate current
9 mA
ClassA1;PentodeUnit
Grid 2 current
3.5 mA
ClassA1;PentodeUnit

Characteristic

Grid 1 voltage for gm=40 uS
-20 V
PentodeUnit

Data set 04

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

Voltage (AC or DC) — published value 1
6.3 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Voltage (AC or DC) — published value 2
10 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current at 6.3 volts — published value 1
6.3 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Current at 6.3 volts — published value 2
0.3 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and heater
5.5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and heater
5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Voltage
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Voltage
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.l Supply Voltage
0 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.l Resistor (Bypassed)
2.2 Mohm
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Resistance (Approx )
0.25 Mohm
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Transconductance
3800
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Current
9 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Grid-No.2 Current
3.5 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
transconductance (µmhos) = 40 — published value 1
40 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
transconductance (µmhos) = 40 — published value 2
-20 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 3 —Cathode — published value 1
3
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 3 —Cathode — published value 2
8
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 4 -Heater — published value 1
4
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Pin 4 -Heater — published value 2
9
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
pin 5 -Heater
5
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
For grid-No.2 voltages between 150
150 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
and 300 volts
300 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Current for plate volts - 10 — published value 1
10 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Plate Current for plate volts - 10 — published value 2
2 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID NQ 3 AND INTERNAL SHIELD
3
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID—Ns2 VOLTS=100
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE VOLTS=100
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-Nsp VOLTS=100
100 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Other

Grid No.l to plate
0.002 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE VOLTAGE
300 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE
300 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Positive-bias value
0 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Negative-bias value
50 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.3 INPUT — published value 1
0 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
GRID-No.3 INPUT — published value 2
2 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE DISSIPATION
3 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater negative with respect to cathode
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
Heater positive with respect to cathode
200 V
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.
PLATE CURRENT
1 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

SECTION 2

Pentode

Other

Plate voltage
100 V
ClassA
Maximum plate voltage
330 V
Maximum screen-grid voltage
330 V
Pentode grid No.l to diode plate
0.0015 mA
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.

Characteristics

Plate resistance
250000 ohm
ClassA
Transconductance
3800 uS
ClassA
Pentode plate to diode plate
0.095
Published datasheet value; multiple numbers on one source row represent separate limits or operating conditions.