Data set 01
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Voltage
180 V
ClassA
Plate Current
15 mA
ClassA
Screen Voltage
180 V
ClassA
Power Output
1.1 W
ClassA
Power - Pentode Single (NOT beam) (under 10W) ·Pentode
6AK6
Miniature industrial audio power pentode providing approximately 1.1 W output from a compact low-dissipation design.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7BK
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 150 mA
Description
Miniature industrial power-output pentode for compact audio-frequency power-amplifier service.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7BK
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7BK - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2G3 | A | G3 — Suppressor GridGroup 7BK2 EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2IS | A | IS — Internal ScreenGroup 7BK2 EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN3H | — | H — Heater EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN4H | — | H — Heater EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN7K | A | K — Cathode EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 200000 Ω
- Transconductance
- 0.0023 S
- Max plate voltage
- 300 V
- Max screen voltage
- 240 V
- Max plate dissipation
- 2.75 W
- Max screen dissipation
- 0.75 W
- Max cathode current
- 20 mA
Published maximum ratings, representative operating characteristics, and capacitance columns reviewed.
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 02
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Maximum plate voltage
300 V
Published handbook rating
Maximum screen voltage
250 V
Published handbook rating
Plate voltage
180 V
ClassA
Screen voltage
180 V
ClassA
Control-grid bias
9 V
ClassA
Plate current
15 mA
ClassA
Screen current
2.5 mA
ClassA
Load resistance
10000 ohm
ClassA
Power output
1.1 W
ClassA
Characteristic
Plate resistance
200000 ohm
Published handbook characteristic
Transconductance
2300 µS
Published handbook characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
150 mA
Published heater rating
Capacitance
Input capacitance
3.6 pF
Published capacitance column
Output capacitance
4.2 pF
Published capacitance column
Grid-to-plate capacitance
0.12 pF
Published capacitance column
Data set 03
1960 RCA Industrial and Communications Types
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Heater Voltage
6.3 V
Data set 04
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Voltage
180 V
ClassA
Screen Voltage
180 V
ClassA
Data set 05
1971 RCA HB3 Binder 3 of 7
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater voltage
6.3 V
Heater current
150 mA
Maximum DC heater-cathode potential
100 V
Plate voltage
180 V
ClassA
Screen voltage
180 V
ClassA
Grid voltage
-7.5 V
ClassA
Plate current
10 mA
ClassA
Screen current
2.5 mA
ClassA
Load resistance
12000 ohm
ClassA
Power output
1.1 W
ClassA
Characteristic
Transconductance
2300 uS
ClassA
Capacitance
Grid-to-plate capacitance
0.12 pF
Input capacitance
3.6 pF
Output capacitance
4.2 pF
Data set 06
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Heater Voltage (ae/de)
6.3 V
Published in approved 6AK6 target entry; Section1
Heater Current
160 mA
Published in approved 6AK6 target entry; Section1
Plate Voltage
300 V
Published in approved 6AK6 target entry; Section1
Screen Voltage (Grid No. 2)
260 V
Published in approved 6AK6 target entry; Section1
Plate Dissipation
2.75 W
Published in approved 6AK6 target entry; Section1
Screen Dissipation
0.75 W
Published in approved 6AK6 target entry; Section1
Plate Voltage
180 V
Published in approved 6AK6 target entry; Section1
Screen Voltage
180 V
Published in approved 6AK6 target entry; Section1
Grid Voltage (Grid No. 1)
-9 V
Published in approved 6AK6 target entry; Section1
Peak A-F Grid Voltage
9 V
Published in approved 6AK6 target entry; Section1
Zero-Signal Plate Current
15 mA
Published in approved 6AK6 target entry; Section1
Transconductance
2300 µS
Published in approved 6AK6 target entry; Section1
Load Resistance
10000 Ω
Published in approved 6AK6 target entry; Section1
Max.-Sig. Power Output
1.1 W
Published in approved 6AK6 target entry; Section1
For fixed-bias operation
0.1 MΩ
Published in approved 6AK6 target entry; Section1
For cathode-bias operation
0.5 MΩ
Published in approved 6AK6 target entry; Section1
Capacitance
Grid to Plate
0.12 pF
Published in approved 6AK6 target entry; Section1
Output
4.2 pF
Published in approved 6AK6 target entry; Section1