Voltage Pentode - Sharp Cutoff (single) ·Pentode
High-transconductance sharp-cutoff pentode designed for wide-band and IF amplification. Its substantial transconductance provides strong fixed-gain signal amplification across broad frequency ranges.
High-transconductance sharp-cutoff wide-band/IF pentode.
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; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2G3 | A | G3 — Suppressor GridGroup 7BK2 EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN2IS | A | IS — Internal ScreenGroup 7BK2 EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN3H | — | H — Heater EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN4H | — | H — Heater EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
| PIN7K | A | K — Cathode EIA chart transcription; independent manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BK |
1 physical section, each with unique specifications.
Section 1
Promoted from clearly identified printed ratings/characteristics; additional published operating points and capacitances retained in TUBE_SECTION_PARAMETER.
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 or filament voltage
6.3 V
Published nominal or representative value
Heater or filament current
450 mA
Published nominal or representative value
Transconductance
9000 µS
Published operating characteristic
Maximum plate dissipation
3.2 W
Published maximum rating
Data set 02
Published operating points and test conditions from this source.
Input capacitance
10 pF
Section1
Output capacitance
3.6 pF
Section1
Grid-to-plate capacitance
0.02 pF
Section1
Plate voltage
300 V
ClassA
Screen voltage
150 V
ClassA
Cathode resistor
160 Ω
ClassA
Plate current
10 mA
ClassA
Screen current
2.5 mA
ClassA
Plate resistance
500000 Ω
ClassA
Transconductance
9000 µS
ClassA
Data set 03
Published operating points and test conditions from this source.
Heater voltage
6.3 V
Nominal
Heater current
450 mA
Nominal
Plate voltage
300 V
Published operating table; OperatingPoint1
Plate voltage
300 V
Published operating table; OperatingPoint1
Plate voltage
150 V
Published operating table; OperatingPoint2
Plate current
10 mA
Published operating table; OperatingPoint1
Plate current
12.5 mA
Published operating table; OperatingPoint2
Data set 04
Published operating points and test conditions from this source.
Heater/filament voltage
6.3 V
Heater/filament current
450 mA
Application summary
High-transconductance sharp-cutoff wide-band/IF pentode.
Plate voltage
300 V
Screen voltage
150 V
Plate current
10 mA
Transconductance
9000 uS
Plate resistance
500000 ohm
Triode-connected transconductance
11000 uS
Triode-connected amplification factor
40