Data set 01
1938 Raytheon
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power Output
5.5 W
ClassA;OneTube
Power - Beam (NOT sweep) ·BeamPower
7C5
Loctal beam-power audio-output tube providing several watts single-ended and substantially more in push-pull service, electrically comparable to familiar 6V6-class output tubes.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 6AA
- Socket code
- LOCTAL8
- Base pins
- 8
- Nominal heater
- 6.3 V / 450 mA
Description
The 7C5 is a beam power amplifier designed for receiver output stages, providing useful audio power at comparatively low supply voltages.
Socket description
Loctal 8-contact base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 6AA
- Socket code
- LOCTAL8
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
6AA - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1Pin 1 | — | H — Heater | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN2Pin 2 | A | P — Plate (Anode) | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN3Pin 3 | A | G2 — Screen Grid | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN4Pin 4 | — | NC | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN5Pin 5 | — | NC | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN6Pin 6 | A | G1 — Control Grid | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN7Pin 7 | A | BP — Beam-Forming PlateGroup AA7 | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN7Pin 7 | A | K — CathodeGroup AA7 | Verified 7C5 JEDEC registration, 6AA pin assignment |
| PIN8Pin 8 | — | H — Heater | Verified 7C5 JEDEC registration, 6AA pin assignment |
Section ratings
1 physical section, each with unique specifications.
Section 1
Beam Power
X-ray radiationInterelectrode capacitances
- Plate resistance
- 52000 Ω
- Transconductance
- 0.0041 S
- Max plate voltage
- 315 V
- Max screen voltage
- 285 V
- Max plate dissipation
- 12 W
- Max screen dissipation
- 2 W
Published promoted fields populated by semantic heading; identical repeated physical sections compressed.
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
1948 Brimar Radio Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristics
Input Capacitance
7.5 pF
G1 to all except anode
Output Capacitance
5.25 pF
Anode to all except G1
Control Grid to Anode Capacitance
0.45 pF
Heater to Cathode Capacitance
4.8 pF
Data set 03
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
HeaterVoltageNominal
7 V
Nominal
HeaterCurrentNominal
480 mA
Nominal
Plate Voltage
250 V
ClassA
Screen Voltage
250 V
ClassA
Power Output
4.5 W
ClassA;OneTube;PlateVoltage=250V
Power Output
10 W
ClassAB;PushPull;TwoTubes;PlateVoltage=250V
Data set 04
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 05
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Typical plate voltage
315 V
ClassA
Typical screen voltage
225 V
ClassA
Typical grid voltage
-13 V
ClassA
Typical plate current
34 mA
ClassA
Typical screen current
2.2 mA
ClassA
Load resistance
8500 Ohm
ClassA
Power output
5.5 W
ClassA
Typical plate voltage
250 V
ClassA
Typical screen voltage
250 V
ClassA
Typical grid voltage
-12.5 V
ClassA
Typical plate current
45 mA
ClassA
Typical screen current
4.5 mA
ClassA
Load resistance
5000 Ohm
ClassA
Power output
4.5 W
ClassA
Characteristic
Plate resistance
77000 Ohm
315VPlate
Transconductance
3750 uS
315VPlate
Plate resistance
52000 Ohm
250VPlate
Transconductance
4100 uS
250VPlate
Data set 06
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Plate Voltage
250 V
ClassA; OneTube
Screen Voltage
250 V
ClassA; OneTube
Plate Current
45 mA
ClassA; OneTube
Load Resistance
5000 ohm
ClassA; OneTube
Power Output
4.5 W
ClassA; OneTube
Data set 07
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power Output
5.5 W
ClassA1
Power Output
14 W
ClassAB;PushPull;TwoTubes
Data set 08
1966 Tung Sol Electronic Tubes 2 of 4
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Plate_voltage
250 V
ClassA,OneTube
Screen_voltage
250 V
ClassA,OneTube
Grid_1_voltage
-12.5 V
ClassA,OneTube
Load_resistance
5000 ohm
ClassA,OneTube
Power_output
4.5 W
ClassA,OneTube
Total_harmonic_distortion
8 %
ClassA,OneTube
Maximum_heater_cathode_voltage
90 V
Characteristic
Zero_signal_plate_current
45 mA
ClassA,OneTube
Maximum_signal_plate_current
47 mA
ClassA,OneTube
Zero_signal_screen_current
4.5 mA
ClassA,OneTube
Capacitance
Input capacitance
8 pF
Output capacitance
6.5 pF