Voltage - Dual Triode (similar high frequency) ·Triode-Triode
Common-cathode twin triode for high-frequency amplifier, mixer, and push-pull oscillator service, with published Class-C RF operation and useful output at VHF frequencies.
The 6J6 is a 7-pin twin triode usable in parallel or push-pull and particularly suitable for mixer service at frequencies up to about 600 MHz; the 6J6A adds controlled heater warm-up.
Miniature 7-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN12P | B | P — Plate (Anode) EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN21P | A | P — Plate (Anode) EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN3H | — | H — Heater EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN4H | — | H — Heater EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN51G1 | A | G1 — Control Grid EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN62G1 | B | G1 — Control Grid EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
| PIN7K | A | K — Cathode EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BF |
2 physical sections, each with unique specifications.
Section 1
Each identical triode section.
Section 2
Second physical triode section; electrically identical twin section.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Published nominal value
Heater current
450 mA
Published nominal value
Transconductance
5300 µS
Published operating characteristic
Data set 02
Published operating points and test conditions from this source.
RF oscillator power output
3.5 W
OscillatorService
Oscillator frequency maximum
50 MHz
Mixer frequency maximum
600 MHz
Data set 03
Published operating points and test conditions from this source.
Maximum plate voltage
300 V
Published handbook rating
Plate voltage
100 V
ClassA
Control-grid bias
8.5 V
ClassA
Plate resistance
7100 ohm
Published handbook characteristic
Transconductance
5300 µS
Published handbook characteristic
Amplification factor
38
Published handbook characteristic
Heater voltage
6.3 V
Published heater rating
Heater current
450 mA
Published heater rating
Input capacitance
2.6 pF
Published capacitance column
Output capacitance
1.6 pF
Published capacitance column
Grid-to-plate capacitance
1.5 pF
Published capacitance column
Data set 04
Published operating points and test conditions from this source.
Plate voltage
100 V
ClassA;EachSection
Plate current
8.5 mA
ClassA;EachSection
Plate voltage
150 V
ClassC;RFAmplifier;BothSections
Plate current
15 mA
ClassC;RFAmplifier;EachSection
Grid current
8 mA
ClassC;RFAmplifier;EachSection
Drive power
0.35 W
ClassC;RFAmplifier;BothSections
RF output power
3.5 W
ClassC;RFAmplifier;BothSections
RF output power
1 W
PushPullOscillator;f=250MHz
Transconductance
5300 uS
ClassA;EachSection
Amplification factor
38 ratio
ClassA;EachSection
Plate resistance
7100 Ohm
ClassA;EachSection
Input capacitance
2.2 pF
EachSection
Output capacitance
0.4 pF
EachSection
Plate-to-grid capacitance
1.6 pF
EachSection
Data set 05
Published operating points and test conditions from this source.
Plate Voltage
100 V
Published operating/characteristic table
Plate Current
8.5 mA
Published operating/characteristic table
Transconductance
5300 uS
Published operating/characteristic table
Plate Resistance
7160 ohm
Published operating/characteristic table
Data set 06
Published operating points and test conditions from this source.
Plate voltage
300 V
Published table
Control-grid bias
-4 V
Published table
Plate current
15 mA
Published table
Transconductance
5300 µS
Published table
Amplification factor
38
Published table
Plate resistance
10000 ohm
Published table
Heater voltage
6.3 V
Published heater rating
Heater current
450 mA
Published heater rating
Data set 07
Published operating points and test conditions from this source.
Heater Voltage
6.3 V
Heater Current
450 mA
Maximum Operating Frequency as Mixer
600 MHz
Maximum Plate Voltage
300 V
Maximum Plate Dissipation
1.5 W
Typical Push-Pull Oscillator Frequency
250 MHz
ClassC; PushPull
Approximate RF Output Power
1 W
ClassC; PushPull; 250MHz
Data set 08
Published operating points and test conditions from this source.
Plate voltage
100 V
ClassA1;EachSection
Plate current
8.5 mA
ClassA1;EachSection
Cathode bias resistor, both sections
50 ohm
ClassA1
RF Class C plate voltage
150 V
ClassC;PushPull;BothSections
RF Class C plate current
30 mA
ClassC;PushPull;BothSections
RF power output
3.5 W
ClassC;PushPull;BothSections
Data set 09
Published operating points and test conditions from this source.
Conversion Transconductance
1900 uS
MixerService