Voltage Pentode - Remote Cutoff (single) ·Pentode
Lock-In semi-remote-cutoff pentode suitable for RF or television service. Its rugged short-lead construction combines controlled-gain high-frequency amplification with improved mechanical stability.
A semi-remote-cutoff pentode suitable for RF or television service, using Lock-In construction for ruggedness and short leads.
Loctal 8-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 |
|---|---|---|---|
| PIN1H | — | H — Heater EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN2P | A | P — Plate (Anode) EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN3G2 | A | G2 — Screen Grid EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN4G3 | A | G3 — Suppressor Grid EIA source transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN5IS | A | IS — Internal Screen EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN6G1 | A | G1 — Control Grid EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN7K | A | K — Cathode EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 8V |
| PIN8H | — | H — Heater EIA chart transcription; manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 8V |
1 physical section, each with unique specifications.
Section 1
Published promoted fields populated by semantic heading; identical repeated physical sections compressed.
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
250 V
Plate Current
9.5 mA
Screen Voltage
150 V
Screen Current
3.5 mA
Control Grid Voltage
-2.5 V
Plate Resistance
0.8 Mohm
Transconductance
3800 µS
Grid Voltage at 5 µS
-19 V
Data set 02
Published operating points and test conditions from this source.
HeaterVoltageNominal
7 V
Nominal
HeaterCurrentNominal
320 mA
Nominal
Plate Voltage
250 V
ClassA
Screen Voltage
150 V
ClassA
Data set 03
Published operating points and test conditions from this source.
Cutoff characteristic
Variable-mu
Data set 04
Published operating points and test conditions from this source.
Input capacitance
8 pF
Output capacitance
7 pF
Grid-to-plate capacitance
0.004 pF
Plate voltage
250 V
ClassA;CathodeBias
Screen-grid voltage
150 V
ClassA;CathodeBias
Cathode resistor
180 ohm
ClassA;CathodeBias
Plate current
10 mA
ClassA;CathodeBias
Screen-grid current
3.2 mA
ClassA;CathodeBias
Plate voltage
100 V
ClassA;PlateVoltage=100V
Screen-grid voltage
100 V
ClassA;PlateVoltage=100V
Grid voltage
-1.5 V
ClassA;PlateVoltage=100V
Plate current
7.5 mA
ClassA;PlateVoltage=100V
Screen-grid current
2.6 mA
ClassA;PlateVoltage=100V
Plate resistance
800000 ohm
ClassA;PlateVoltage=250V
Transconductance
4000 uS
ClassA;PlateVoltage=250V
Plate resistance
350000 ohm
ClassA;PlateVoltage=100V
Transconductance
4000 uS
ClassA;PlateVoltage=100V
Data set 05
Published operating points and test conditions from this source.
Plate Resistance
800000 ohm
Typical
Transconductance
4500 uS
Typical