Voltage Pentode - Sharp Cutoff (single) ·Pentode
Sharp-cutoff high-transconductance pentode for television IF and VHF tuner RF amplification.
Sharp-cutoff pentode used as a television IF amplifier to about 45 MHz and as an RF amplifier in VHF television tuners.
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 |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN2K | A | K — Cathode EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN3H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN4H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7G3 | A | G3 — Suppressor GridGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
| PIN7IS | A | IS — Internal ScreenGroup 7CM7 EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 128, 7CM |
1 physical section, each with unique specifications.
Section 1
Sparse-source exception: this approved sheet refers to 6CB6-A for the underlying electrical characteristics and does not reproduce those ratings/characteristics; no external values imported.
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.
Plate voltage
200 V
ClassA
Screen-grid voltage
150 V
ClassA
Grid No.1 bias
Rk V
ClassA
Plate current
9.5 mA
ClassA
Screen-grid current
2.8 mA
ClassA
Plate resistance
600000 ohm
ClassA
Transconductance
6200 uS
ClassA
Data set 02
Published operating points and test conditions from this source.
Heater Warmup Time
11 s
Data set 03
Published operating points and test conditions from this source.
Plate voltage
125 V
Screen-grid voltage
125 V
Cathode bias resistor
56 Ohm
Plate current
13 mA
Plate resistance
280000 Ohm
Transconductance
8000 uS
Control-grid cutoff voltage
-6.5 V
Grid-to-plate capacitance
0.025 pF
Unshielded
Input capacitance
6.5 pF
Unshielded
Output capacitance
2 pF
Unshielded
Data set 04
Published operating points and test conditions from this source.
Heater voltage
3.15 V
Published heater rating
Heater current
600 mA
Published heater rating
Plate resistance
280000 ohm
RForIFAmplifier
Transconductance
8000 µS
RForIFAmplifier
Grid-to-plate capacitance
0.025 pF
WithoutShield
Input capacitance
6.5 pF
Published
Plate voltage
125 V
RForIFAmplifier
Screen voltage
125 V
RForIFAmplifier
Plate current
13 mA
RForIFAmplifier
Screen current
3.7 mA
RForIFAmplifier
Data set 05
Published operating points and test conditions from this source.
Heater warm-up time
11 s
Heater-cathode voltage, heater positive, DC component
100 V
Heater-cathode voltage, heater positive, total DC and peak
200 V
Heater-cathode voltage, heater negative, DC component
200 V
Heater-cathode voltage, heater negative, total DC and peak
300 V
Data set 06
Published operating points and test conditions from this source.
Current — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Current — published value 2
600
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Current — published value 3
0.04
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Voltage (ac or dc) at 0.600 A — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Voltage (ac or dc) at 0.600 A — published value 2
0.6 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Voltage (ac or dc) at 0.600 A — published value 3
3.15 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Warm-up Time (Average)
11
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater~athode Voltage — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater~athode Voltage — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Current — published value 1
0.6
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Current — published value 2
0.04
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Data set 07
Published operating points and test conditions from this source.
about
45 MHz
Published in approved 6CB6A target datasheet entry; Section1
Heater Voltage (ac/dc) 3.15 4.2
6.3 V
Published in approved 6CB6A target datasheet entry; Section1
Heater Current 0.6 0.45
300 mA
Published in approved 6CB6A target datasheet entry; Section1
Heater Warm-up Time (Average) 11 11
11 seconds
Published in approved 6CB6A target datasheet entry; Section1
Plate Voltage
330 V
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.S (Suppressor-Grid) Voltage, Positive value
0 V
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.2 Supply Voltage
330 V
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value
0 V
Published in approved 6CB6A target datasheet entry; Section1
For grid-No.2 voltages between 165 and
330 V
Published in approved 6CB6A target datasheet entry; Section1
Plate Supply Voltage
125 V
Published in approved 6CB6A target datasheet entry; Section1
Cathode-Sias Resistor
56 Ω
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.2 Current
3.7 mA
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.l VoJt&ge (Approx.) for plate current of 20 jiA
-6.5 V
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.l Voltage (Approx.) for plate current of
2.8 mA
Published in approved 6CB6A target datasheet entry; Section1
Grid-No.l Voltage (Approx.) for plate current of 2.8 mA
-3 V
Published in approved 6CB6A target datasheet entry; Section1
Grid No. 3. and Internal Shield 6.5
6.6 pF
Published in approved 6CB6A target datasheet entry; Section1