Data set 01
1960 RCA Industrial and Communications Types
Published operating points and test conditions from this source.
SECTION 1
Triode
CrossReference
Prototype / equivalent family
2C51
Application
Application
General-purpose amplifier
Voltage - Dual Triode (similar high frequency) ·Triode-Triode
5670WA
Ruggedized medium-mu twin triode for dependable high-frequency amplifier and push-pull service, a military or critical-service member of the 2C51/5670 family.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / 350 mA
Description
Ruggedized medium-mu twin triode for dependable high-frequency amplifier and push-pull 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
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 350 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6400 Ω
- Transconductance
- 0.0055 S
- Amplification factor
- 35
- Max plate voltage
- 330 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 18 mA
Two similar triode sections; represented once under identical-section compression.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 6400 Ω
- Transconductance
- 0.0055 S
- Amplification factor
- 35
- Max plate voltage
- 330 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 18 mA
Second physical triode restored under current one-row-per-physical-section policy.
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
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater voltage
6.3 V
Nominal
Heater current
350 mA
Nominal
Plate voltage
330 V
Published operating table; OperatingPoint1
Plate voltage
160 V
Published operating table; OperatingPoint1
Data set 03
1966 Tung Sol Electronic Tubes 3 of 4
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Plate voltage
150 V
ClassA;EachSection
Cathode resistor
240 ohm
ClassA;EachSection
Plate current
8.2 mA
ClassA;EachSection
Plate voltage
300 V
ClassAB;PushPull;TwoSections
Cathode resistor
800 ohm
ClassAB;PushPull;TwoSections
Zero-signal plate current
4.9 mA
ClassAB;PushPull;EachSection
Maximum-signal plate current
6.3 mA
ClassAB;PushPull;EachSection
Plate-to-plate load impedance
27000 ohm
ClassAB;PushPull
Maximum-signal power output
1 W
ClassAB;PushPull
Total harmonic distortion
10 %
ClassAB;PushPull
Characteristic
Transconductance
5500 uS
ClassA;EachSection
Amplification factor
35
ClassA;EachSection