6927

Common-cathode twin triode designed for high-frequency amplifier, oscillator, and mixer service, with manufacturer data supporting operation to approximately 600 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: E7-1
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 330 mA

Description

Twin triode with common cathode for high-frequency amplifier, oscillator or mixer service up to about 600 MHz.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: E7-1
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 330 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

E7-1 - 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: 7200 Ω
Transconductance: 0.0053 S
Amplification factor: 38
Max plate voltage: 200 V
Max plate dissipation: 1.3 W

Representative row for two electrically identical triode sections sharing a common cathode. Published ratings and characteristics audited; additional numerical data retained in TUBE_SECTION_PARAMETER.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7200 Ω
Transconductance: 0.0053 S
Amplification factor: 38
Max plate voltage: 200 V
Max plate dissipation: 1.3 W

Second physical triode section; electrically identical twin section.

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 01

1960 Ericsson

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

The
6927
The 6927 is suitable for use as highfrequency amplifier, oscillator or
Published value [1]
1
1. Plate of Section 2 3 5 :
Published value [2]
2
1. Plate of Section 2 3 5 :
Published value [3]
3
1. Plate of Section 2 3 5 :
Published value [4]
5
1. Plate of Section 2 3 5 :
Published value [1]
2
2. Plate of Section 1 [= Sy 2 ©
Published value [2]
1
2. Plate of Section 1 [= Sy 2 ©
Published value [3]
2
2. Plate of Section 1 [= Sy 2 ©
Published value [1]
3
3. Heater 2 R x =
Published value [2]
2
3. Heater 2 R x =
Published value [1]
4
4, Heater - 8 3 %
Published value [2]
8
4, Heater - 8 3 %
Published value [3]
3
4, Heater - 8 3 %
Published value [1]
5
5. Grid of Section 1 2
Published value [2]
1
5. Grid of Section 1 2
Published value [3]
2
5. Grid of Section 1 2
Published value [1]
6
6. Grid of Section 2 1) Ya) 7
Published value [2]
2
6. Grid of Section 2 1) Ya) 7
Published value [3]
1
6. Grid of Section 2 1) Ya) 7
Published value [4]
7
6. Grid of Section 2 1) Ya) 7
Published value
7
7. Cathode
Grid to Plate, each Section [1]
1.5
Grid to Plate, each Section . 1.5 1.5 uuF
Grid to Plate, each Section [2]
1.5
Grid to Plate, each Section . 1.5 1.5 uuF
Input, each Section [1]
2.6
Input, each Section. . 2.6 2.0 uuF
Input, each Section [2]
2
Input, each Section. . 2.6 2.0 uuF
Output, Sectionl ., [1]
1.6
Output, Sectionl ., . . . . 1.6 0.45 uuF
Output, Sectionl ., [2]
0.45
Output, Sectionl ., . . . . 1.6 0.45 uuF
Output, Section [1]
2
Output, Section 2 . , . . . 1.0 0. 40 uuF
Output, Section [2]
1
Output, Section 2 . , . . . 1.0 0. 40 uuF
Output, Section [3]
0
Output, Section 2 . , . . . 1.0 0. 40 uuF
Output, Section [4]
40
Output, Section 2 . , . . . 1.0 0. 40 uuF
Grid to Plate, each Section [1]
1.2
Grid to Plate, each Section . 1,2 1.5 1.8 uuF
Grid to Plate, each Section [2]
1.5
Grid to Plate, each Section . 1,2 1.5 1.8 uuF
Grid to Plate, each Section [3]
1.8
Grid to Plate, each Section . 1,2 1.5 1.8 uuF
Input, each Section [1]
1.4
Input, each Section . . . . . . 1.4 2.0 2.6 uuF
Input, each Section [2]
2
Input, each Section . . . . . . 1.4 2.0 2.6 uuF
Input, each Section [3]
2.6
Input, each Section . . . . . . 1.4 2.0 2.6 uuF
Output, Section [1]
2
Output, Section 2 . . . . &+ + + + & 0.25 0.40 0. 55 uulF
Output, Section [2]
0.25
Output, Section 2 . . . . &+ + + + & 0.25 0.40 0. 55 uulF
Output, Section [3]
0.4
Output, Section 2 . . . . &+ + + + & 0.25 0.40 0. 55 uulF
Output, Section [4]
0
Output, Section 2 . . . . &+ + + + & 0.25 0.40 0. 55 uulF
Output, Section [5]
55
Output, Section 2 . . . . &+ + + + & 0.25 0.40 0. 55 uulF
Plate Voltage
200 V
Plate Voltage . . . . . . . . . . . . . 200 volts
Plate Current
15 mA
Plate Current . . . . . . . . . . . . . 15 milliamps
Plate Dissipation . . e e e e e
1.3 W
Plate Dissipation . . e e e e e 1.3 watt
Heater - Cathode Voltage
90 V
Heater - Cathode Voltage .. . .. 90 volts
Bulb Temperature (at hottest po1nt)
150
Bulb Temperature (at hottest po1nt) ... 150 °c
Grid Circuit Resistance , , ,
0.5 Mohm
Grid Circuit Resistance , , , . . . . . 0.5 megohm
Heater Volta.ge:W e e e e e [1]
6.3
Heater Volta.ge:W e e e e e 6.3 % 59 6.3% 59 yolts
Heater Volta.ge:W e e e e e [2]
59
Heater Volta.ge:W e e e e e 6.3 % 59 6.3% 59 yolts
Heater Volta.ge:W e e e e e [3]
6.3
Heater Volta.ge:W e e e e e 6.3 % 59 6.3% 59 yolts
Heater Volta.ge:W e e e e e [4]
59
Heater Volta.ge:W e e e e e 6.3 % 59 6.3% 59 yolts
Heater Current . . . . ., ., [1]
0 mA
Heater Current . . . . ., ., . . . 0. 330 0.330 amp
Heater Current . . . . ., ., [2]
330 A
Heater Current . . . . ., ., . . . 0. 330 0.330 amp
Heater Current . . . . ., ., [3]
330 mA
Heater Current . . . . ., ., . . . 0. 330 0.330 amp
Plate Supply Voltage [1]
0 V
Plate Supply Voltage 0" e v - 100 130 volts
Plate Supply Voltage [2]
100 V
Plate Supply Voltage 0" e v - 100 130 volts
Plate Supply Voltage [3]
130 V
Plate Supply Voltage 0" e v - 100 130 volts
Cathode Bias Resistor . . . ., [1]
68 ohm
Cathode Bias Resistor . . . ., . . 68 100 ohms
Cathode Bias Resistor . . . ., [2]
100 ohm
Cathode Bias Resistor . . . ., . . 68 100 ohms
Plate Current ., ., [1]
6.5 mA
Plate Current ., ., . . . . . . . . 6.5 7.7 milliamps
Plate Current ., ., [2]
7.7 mA
Plate Current ., ., . . . . . . . . 6.5 7.7 milliamps
Plate Resistance [1]
7500 ohm
Plate Resistance . . . . . . . . 7500 7200 ohms
Plate Resistance [2]
7200 ohm
Plate Resistance . . . . . . . . 7500 7200 ohms
Transconductance . , [1]
5000 uS
Transconductance . , . ... 5000 5300 umhos
Transconductance . , [2]
5300 uS
Transconductance . , . ... 5000 5300 umhos
Equivalent Noise Resmtance [1]
500
Equivalent Noise Resmtance ... 500 470 ohms
Equivalent Noise Resmtance [2]
470
Equivalent Noise Resmtance ... 500 470 ohms
Heater Voltage
6.3 V
Heater Voltage . . . . . . . . . . . . 6.3 volts
Plate Supply Voltage
130 V
Plate Supply Voltage . . . . . . . . . . 130 volts
Cathode Bias Resistor®,
100 ohm
Cathode Bias Resistor®, . . . . . . . . 100 ohms
Heater Current . . . . , . , [1]
295 mA
Heater Current . . . . , . , . . 295 330 365 milliamps
Heater Current . . . . , . , [2]
330 mA
Heater Current . . . . , . , . . 295 330 365 milliamps
Heater Current . . . . , . , [3]
365 mA
Heater Current . . . . , . , . . 295 330 365 milliamps
Plate Current e e e e e e e [1]
4.7 mA
Plate Current e e e e e e e 4,7 7.7 10.7 milliamps
Plate Current e e e e e e e [2]
7.7 mA
Plate Current e e e e e e e 4,7 7.7 10.7 milliamps
Plate Current e e e e e e e [3]
10.7 mA
Plate Current e e e e e e e 4,7 7.7 10.7 milliamps
Transconductance , , [1]
4200 uS
Transconductance , , 4200 5300 6400 umhos
Transconductance , , [2]
5300 uS
Transconductance , , 4200 5300 6400 umhos

Data set 02

1965 Ericsson Longlife

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate supply voltage
100 V
ClassA;EachSection
Cathode bias resistor
68 Ohm
ClassA;BothSections
Plate current
6.5 mA
ClassA;EachSection
Plate supply voltage
130 V
ClassA;EachSection
Cathode bias resistor
100 Ohm
ClassA;BothSections
Plate current
7.7 mA
ClassA;EachSection
Transconductance minimum
4200 uS
EachSection
Transconductance maximum
6400 uS
EachSection

Characteristics

Transconductance
5000 uS
ClassA;EachSection;Va=100V
Amplification factor
38 ratio
ClassA;EachSection
Plate resistance
7500 Ohm
ClassA;EachSection;Va=100V
Transconductance
5300 uS
ClassA;EachSection;Va=130V
Amplification factor
38 ratio
ClassA;EachSection
Plate resistance
7200 Ohm
ClassA;EachSection;Va=130V

Data set 03

196X LM Ericsson

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater voltage
6.3 V
Heater current
330 mA
Plate resistance
7200 ohm
Amplification factor
38

Other

Maximum plate voltage
220 V
Maximum plate dissipation
1.4 W
Maximum mixer frequency
600 Mc/s
PlatesParallel GridsPushPull