Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
6.3 V
Heater Current
450 mA
Power - Triode Single (under 10W) ·Triode-Triode
ECC91
Common-cathode VHF double triode for RF power amplification, oscillator, mixer, and frequency-multiplier service, capable of several watts RF output and operation to roughly 250 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- Miniature
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 450 mA
Description
VHF double triode with common cathode for RF power amplifier, oscillator, and frequency-multiplier 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
- Miniature
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Miniature - 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
- 7100 Ω
- Transconductance
- 0.0053 S
- Amplification factor
- 38
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 22 mA
Representative section for two electrically similar triodes.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 7100 Ω
- Transconductance
- 0.0053 S
- Amplification factor
- 38
- Max plate voltage
- 300 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 22 mA
Second physical triode restored.
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
1953 RFT Rundfunk Technik
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
450 mA
Nominal
Maximum Plate Voltage
330 V
Maximum Plate Dissipation
2.5 W
Maximum Cathode Current
20 mA
Characteristic
Transconductance
5300 µS
Typical
Amplification Factor
38
Typical
Plate Resistance
7100 ohm
Typical
Data set 03
1961 Ferranti Technical Handbook
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater Voltage
6.3 V
Heater Current
450 mA
Other
Power Output
3.5 W
BothSections
Data set 04
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater Voltage
6.3 V
Heater Current
400 mA
Plate Voltage
100 V
EachSection
Plate Current
8.5 mA
EachSection
Cathode Resistor
100 ohm
EachSection
Transconductance
5300 uS
EachSection
Amplification Factor
38 ratio
EachSection
Plate Resistance
7100 ohm
EachSection
Other
Plate Voltage
150 V
ClassC; PushPull; RFAmplifier; Oscillator; 80MHz
Plate Current
15 mA
EachSection; ClassC; PushPull; 80MHz
RF Output Power
8 W
PushPull; 80MHz
Data set 05
1963 Philips Electron Tubes Handbook V1a
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Plate voltage
100 V
EachSection
Plate current
9 mA
EachSection
Grid voltage
-0.9 V
EachSection
Transconductance
5.6 mA/V
EachSection
Amplification factor
38
EachSection
Plate resistance
6.8 kOhm
EachSection
Other
Plate voltage
150 V
ClassC PushPull RFAmplifier
Total plate current
16.9 mA
ClassC PushPull 100Mc/s
Load power
1.47 W
ClassC PushPull 100Mc/s
Maximum plate voltage
300 V
EachSection
Maximum plate dissipation
1.5 W
EachSection
Maximum cathode current
22 mA
EachSection
Maximum frequency
250 Mc/s
Capacitance
Anode-to-grid capacitance
1.6 pF
EachSection
Data set 06
1967 Mullard Receiving Tubes for Maintenance
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Plate voltage
100 V
EachSection
Plate current
9 mA
EachSection
Grid voltage
-0.9 V
EachSection
Transconductance
5.6 mA/V
EachSection
Amplification factor
38
EachSection
Plate resistance
6.8 kOhm
EachSection
Other
Plate voltage
150 V
ClassC PushPull RFAmplifier
Total plate current
16.9 mA
ClassC PushPull 100Mc/s
Load power
1.47 W
ClassC PushPull 100Mc/s
Maximum plate voltage
300 V
EachSection
Maximum plate dissipation
1.5 W
EachSection
Maximum cathode current
22 mA
EachSection
Maximum frequency
250 Mc/s
Capacitance
Anode-to-grid capacitance
1.6 pF
EachSection
Data set 07
1969 Tesla Manual of Electronic Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Heater voltage
6.3 V
Published nominal value
Heater current
450 mA
Published nominal value
Transconductance
1900 µS
Published operating characteristic
Other
Maximum plate dissipation
1.5 W
Published maximum rating
Application
RF amplifier, mixer, phase inverter
Printed source applications
Data set 08
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
1) Automatic grid bias
1 mA
1) Automatic grid bias