ER300B

Filament Voltage................................................................5 V

Filament Current ............................................................1.2 A

Amplification Factor ..........................................................3.3

Transconductance ........................................................3.3 mS

Plate Resistance ........................................................950 Ohm

Max. Plate Voltage .........................................................600 V

Max. Plate Dissipation ....................................................40 W  

ER300B-Mo

Filament Voltage................................................................5 V

Filament Current ............................................................1.2 A

Amplification Factor ..........................................................3.3

Transconductance ........................................................3.3 mS

Plate Resistance ........................................................950 Ohm

Max. Plate Voltage .........................................................600 V

Max. Plate Dissipation ....................................................40 W

Molybdenum Plate version 

Compatible with ER300B                                                                                                                                                                                                                                                         

TM300B

Filament Voltage................................................................5 V

Filament Current ............................................................1.2 A

Amplification Factor ..........................................................3.3

Transconductance ........................................................3.3 mS

Plate Resistance ........................................................950 Ohm

Max. Plate Voltage .........................................................600 V

Max. Plate Dissipation ....................................................40 W

Private edition available in limited quantities only                                                                                                                                                                                                                                                                                                                                                                          

ER211

Filament Voltage ...............................................................10 V

Filament Current ...........................................................3.25 A

Amplification Factor ............................................................12

Transconductance .........................................................3.3 mS

Plate Resistance ......................................................3600 Ohm

Max. Plate Voltage ........................................................1250 V

Max. Plate Dissipation .....................................................75 W

ER845

Filament Voltage ...............................................................10 V

Filament Current ...........................................................3.25 A

Amplification Factor ...........................................................5.3

Transconductance .........................................................3.1 mS

Plate Resistance .......................................................1700 Ohm

Max. Plate Voltage .........................................................1250 V

Max. Plate Dissipation ....................................................100 W

ER274A

Filament Voltage .................................................................5 V

Filament Current .................................................................2 A

Peak Inverse Voltage .....................................................1500 V

Peak Current per Plate .................................................675 mA

DC Output Current (L-Input) ......................................225 mA

DC Output Current (C-Input) ......................................160 mA

UX4 base

ER274B

Filament Voltage .................................................................5 V

Filament Current .................................................................2 A

Peak Inverse Voltage .....................................................1500 V

Peak Current per Plate .................................................675 mA

DC Output Current (L-Input) ......................................225 mA

DC Output Current (C-Input) ......................................160 mA

Octal base

ER5U4G

Filament Voltage .................................................................5 V

Filament Current .................................................................3 A

Peak Inverse Voltage .....................................................1550 V

Peak Current per Plate ........................................................1 A

DC Output Current (L-Input) ......................................275 mA

DC Output Current (C-Input) ......................................275 mA

Octal base

ER5Z3

Filament Voltage .................................................................5 V

Filament Current .................................................................3 A

Peak Inverse Voltage .....................................................1550 V

Peak Current per Plate ........................................................1 A

DC Output Current (L-Input) ......................................275 mA

DC Output Current (C-Input) ......................................275 mA

UX4 base

ER242

Filament Voltage .................................................................10 V

Filament Current .............................................................3.25 A

Amplification Factor ..............................................................12

Transconductance ..........................................................3.3 mS

Plate Resistance .......................................................3600 Ohm

Max. Plate Voltage ........................................................1250 V

Max. Plate Dissipation.......................................................75 W

Molybdenum Metal Plate

Compatible with ER 211

ER284

Filament Voltage ................................................................10 V

Filament Current ............................................................3.25 A

Amplification Factor ............................................................5.3

Transconductance ..........................................................3.1 mS

Plate Resistance .......................................................1700 Ohm

Max. Plate Voltage .........................................................1250 V

Max. Plate Dissipation ....................................................100 W

Molybdenum Metal Plate

Compatible with ER 845

ER50

Filament Voltage ................................................................7,5 V

Filament Current ..............................................................1.25 A

Amplification Factor..............................................................3.8

Transconductance ............................................................2.1 mS

Plate Resistance .........................................................1800 Ohm

Max. Plate Voltage ............................................................600 V

Max. Plate Dissipation .......................................................30 W

ER801A

Filament Voltage.................................................................7,5 V

Filament Current ..............................................................1.25 A

Amplification Factor ................................................................8

Transconductance ............................................................1.7 mS

Plate Resistance ........................................................4600 Ohm

Max. Plate Voltage.............................................................600 V

Max. Plate Dissipation .......................................................20 W

ER801A-Mo

Filament Voltage.................................................................7,5 V

Filament Current ..............................................................1.25 A

Amplification Factor ................................................................8

Transconductance ............................................................1.7 mS

Plate Resistance ........................................................4600 Ohm

Max. Plate Voltage.............................................................600 V

Max. Plate Dissipation .......................................................20 W

TM801A

Filament Voltage.................................................................7,5 V

Filament Current ..............................................................1.25 A

Amplification Factor ................................................................8

Transconductance ..............................................................2 mS

Plate Resistance ........................................................4000 Ohm

Max. Plate Voltage.............................................................600 V

Max. Plate Dissipation .......................................................20 W