Data set 01
1948 Brimar Radio Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
HeaterOrFilamentVoltage
35 V
HeaterOrFilamentCurrent
150 mA
Other
Power Output
3.3 W
ClassA
Power - Beam Single (NOT sweep) (under 10W) ·BeamPower
35L6GT
Beam-power output tube for AC/DC receivers using 150 mA heater strings, widely suited to single-ended audio-frequency power stages at modest supply voltage.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7AC
- Socket code
- IO
- Base pins
- 7
- Nominal heater
- 35 V / 150 mA
Description
Beam power amplifier for output stages of AC/DC receivers using 150 mA heater strings. It uses a nominal 35 V, 0.15 A heater. The supplied datasheet was used for ratings, characteristics, and typical operating data.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7AC
- Socket code
- IO
- Base pins
- 7
- Nominal heater voltage
- 35 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7AC - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Pin 1 | — | NC | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN2Pin 2 | — | H — Heater | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN3Pin 3 | A | P — Plate (Anode) | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN4Pin 4 | A | G2 — Screen Grid | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN5Pin 5 | A | G1 — Control Grid | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN7Pin 7 | — | H — Heater | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN8Pin 8 | A | BP — Beam-Forming PlateGroup AC8 | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
| PIN8Pin 8 | A | K — CathodeGroup AC8 | Verified 12L6GT/25L6GT manufacturer basing, 7AC |
Section ratings
1 physical section, each with unique specifications.
Section 1
Beam Power
X-ray radiationInterelectrode capacitances
- Plate resistance
- 14000 Ω
- Transconductance
- 0.0058 S
- Max plate voltage
- 200 V
- Max screen voltage
- 125 V
- Max plate dissipation
- 8.5 W
- Max screen dissipation
- 1 W
- Max cathode current
- 100 mA
- Rectifier max heater-cathode voltage
- 90 V
Class-A; alternate 200 V point published.
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
1958 Brimar Radio Valve No 7
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Application
Application
Audio output
Data set 03
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Plate voltage
200 V
ClassA
Screen voltage
125 V
ClassA
Cathode resistor
180 Ω
ClassA
Plate current
43 mA
ClassA
Screen current
2 mA
ClassA
Load resistance
5000 Ω
ClassA
Power output
3 W
ClassA
Plate voltage
110 V
ClassA
Screen voltage
110 V
ClassA
Control-grid voltage
-7.5 V
ClassA
Plate current
40 mA
ClassA
Screen current
3 mA
ClassA
Load resistance
2500 Ω
ClassA
Power output
1.5 W
ClassA
Characteristic
Plate resistance
34000 Ω
ClassA
Transconductance
6100 µS
ClassA
Plate resistance
14000 Ω
ClassA
Transconductance
5800 µS
ClassA
Data set 04
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
HeaterOrFilamentVoltage
35 V
HeaterOrFilamentCurrent
150 mA
Other
Power Output
3.3 W
ClassA
Data set 05
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power Output
3 W
Typical
Characteristic
Plate Resistance
34000 ohm
Typical
Transconductance
6100 uS
Typical
Data set 06
1965 Westinghouse Data Book
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
Heater Voltage
35 V
Heater Current
150 mA
Transconductance
6100 uS
Input Capacitance
8.5 pF
Output Capacitance
9.5 pF
Other
Plate Voltage
110 V
ClassA
Screen Voltage
110 V
ClassA
Grid Voltage
-7.5 V
ClassA
Plate Current
49 mA
ClassA
Screen Current
4 mA
ClassA
Load Resistance
2500 ohm
ClassA
Power Output
2 W
ClassA
Data set 07
1966 Tung Sol Electronic Tubes 3 of 4
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
Plate Resistance
24000 ohm
Published datasheet value
Other
MaxPlateVoltage
200 V
Published datasheet value
MaxScreenVoltage
125 V
Published datasheet value
MaxPlateDissipation
6.5 W
Published datasheet value
MaxScreenDissipation
1 W
Published datasheet value
Heater Voltage
35 V
Nominal heater rating
Heater Current
150 mA
Nominal heater rating
Data set 08
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Plate Voltage
110 V
ClassA
Screen Voltage
110 V
ClassA
Plate Current
40 mA
ClassA
Maximum-Signal Power Output
1.5 W
ClassA
Data set 09
1971 RCA HB3 Binder 5 of 7
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Maximum Plate Voltage
200 V
Maximum Screen Voltage
117 V
Plate Dissipation
8.5 W
Screen Dissipation
1 W
Plate Voltage
110 V
Plate Voltage
200 V
Characteristics
Plate Resistance
40000 Ω
Transconductance
5900 µS