Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 3
Triode
Characteristic
Heater Warmup Time
11 s
Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
4AV6
Double-diode high-mu triode combining detector, AVC, and audio voltage-amplifier functions in automobile and AC-operated receivers. The paired diodes provide rectification while the triode supplies substantial gain after detection.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 3
- Base
- 7BT
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 4.2 V / 450 mA
Description
Twin-diode high-mu triode used as a combined detector, amplifier, and AVC tube in automobile and AC-operated radio receivers.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7BT
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 4.2 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7BT - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN11G1 | A | G1 — Control Grid EIA source label 1G1; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN2K | A | K — Cathode EIA source label K; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN3H | — | H — Heater EIA source label H; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN4H | — | H — Heater EIA source label H; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN52P | B | P — Plate (Anode) EIA source label 2P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN63P | C | P — Plate (Anode) EIA source label 3P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
| PIN71P | A | P — Plate (Anode) EIA source label 1P; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BT |
Section ratings
3 physical sections, each with unique specifications.
Section 1
Diode
X-ray radiationInterelectrode capacitances
- Max plate dissipation
- 0.55 W
- Max cathode current
- 1 mA
- Rectifier warm-up time
- 11 s
Published ratings and characteristics promoted where applicable.
Section 2
Diode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Second physical diode section added in approved section-structure reconciliation.
Section 3
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 62500 Ω
- Transconductance
- 0.0016 S
- Amplification factor
- 100
- Max plate voltage
- 300 V
- Max plate dissipation
- 0.55 W
- Rectifier warm-up time
- 11 s
Published ratings and characteristics promoted where applicable.
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
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Diode
Other
Application
Detector/AVC diode
EachDiode
Peak inverse voltage maximum
330 V
EachDiode
Average current maximum
1 mA
EachDiode
SECTION 3
Triode
Other
Plate voltage
100 V
AudioAmplifier
Control-grid voltage
-1 V
AudioAmplifier
Plate voltage
250 V
AudioAmplifier
Control-grid voltage
-2 V
AudioAmplifier
Characteristic
Plate resistance
80000 Ω
100VPlate
Amplification factor
100
Section1
Plate resistance
62500 Ω
250VPlate
Transconductance
1600 µS
Section1
Capacitance
Grid-to-plate capacitance
1.7 pF
Section1
Data set 03
1971 RCA HB3 Binder 4 of 7
Published operating points and test conditions from this source.
SECTION 3
Triode
Other
Heater Current
420 mA to 480 mA
Published nominal ± tolerance
Heater Voltage
4.2 V
At heater current 0.45 A
Warm-Up Time
11 s
Average
Plate Voltage
250 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Grid Voltage
-2 V
Inherited from explicitly referenced 6-volt parent type; heater variant
Plate Current
1.2 mA
Inherited from explicitly referenced 6-volt parent type; heater variant
Characteristics
Amplification Factor
100
Inherited from explicitly referenced 6-volt parent type; heater variant
Plate Resistance
62500 Ω
Inherited from explicitly referenced 6-volt parent type; heater variant
Transconductance
1600 µS
Inherited from explicitly referenced 6-volt parent type; heater variant
Data set 04
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Diode
Other
Heater Voltage (ac/dc) 4.2 6.3
12.6 V
Published in approved 6AV6 target entry; Section2
Heater Current 0.45 0.3
150 mA
Published in approved 6AV6 target entry; Section2
Capacitance
Triode Grid to Triode Plate
2 pF
Published in approved 6AV6 target entry; Section2
Triode Grid to Cathode and Heater
2.2 pF
Published in approved 6AV6 target entry; Section2
This value is
1.2 pF
Published in approved 6AV6 target entry; Section2
Plate Voltage
330 V
Published in approved 6AV6 target entry; Section2
Grid Voltage, Positive-bias value
0 V
Published in approved 6AV6 target entry; Section2
Plate Dissipation
0.55 W
Published in approved 6AV6 target entry; Section2
Characteristic
Plate Voltage 100
250 V
Published in approved 6AV6 target entry; Section2
— 1
-2 V
Published in approved 6AV6 target entry; Section2
Plate Resistance 80000
62500 Ω
Published in approved 6AV6 target entry; Section2
Plate Current 0.50
1.2 mA
Published in approved 6AV6 target entry; Section2
Plate Current (Each Unit)
1 mA
Published in approved 6AV6 target entry; Section2
SECTION 3
Triode
Other
Heater Voltage (ac/dc) 4.2 6.3
12.6 V
Published in approved 6AV6 target entry; Section1
Heater Current 0.45 0.3
150 mA
Published in approved 6AV6 target entry; Section1
Capacitance
Triode Grid to Triode Plate
2 pF
Published in approved 6AV6 target entry; Section1
Triode Grid to Cathode and Heater
2.2 pF
Published in approved 6AV6 target entry; Section1
This value is
1.2 pF
Published in approved 6AV6 target entry; Section1
Plate Voltage
330 V
Published in approved 6AV6 target entry; Section1
Grid Voltage, Positive-bias value
0 V
Published in approved 6AV6 target entry; Section1
Plate Dissipation
0.55 W
Published in approved 6AV6 target entry; Section1
Characteristic
Plate Voltage 100
250 V
Published in approved 6AV6 target entry; Section1
— 1
-2 V
Published in approved 6AV6 target entry; Section1
Plate Resistance 80000
62500 Ω
Published in approved 6AV6 target entry; Section1
Plate Current 0.50
1.2 mA
Published in approved 6AV6 target entry; Section1
Plate Current (Each Unit)
1 mA
Published in approved 6AV6 target entry; Section1