211 vacuum tube hifi amplifiers Audio tube 211

Specifications

1.ISO9001:2008
2.Audio electron vacuum tube
3.Used in pair for amplifier
4.Exquisite triode
5.vacuum tube hifi amplifiers

Audio frequency power amplifier , Modulator

General Characteristics

Filament Voltage                                                                                      10

Filament Current (amps)                                                                          3.25

Amplification Factor                                                                                  12.5

Grid to Plate Transconductance@ 100 ma. ( micromhos)                        4300

Direct Interelectrode Capacitances:

Grid to Plate                                                                                               9.0

Grid to Filament                                                                                         5.5

Plate to Filamen                                                                                         3.5

MAXIMUM RATING AND TYPICAL OPERATING CONDITIONS

     

   A.F. Power Amplifier and Modulator--- Class A ( typical operation One tube)

 

 

A.C. Filament Voltage                                                         10

D.C.Plate Voltage                                                                1000

D.C.Grid Voltage                                                                 -55

Peak A.F. Grid Voltage                                                        50

D.C Plate Current ( ma.)                                                     75

Plate Dissipation ( watts)                                                   75

Load Resistance( ohms)                                                   4800

Power output ( watts)                                                          14

Distortion ( % Sencond Harmaonic)                                5

  A.F. Power Amplifier and Modulator--- Class AB( typical operation Two tubes)

A.C. Filament Voltage                                                         10                                 10

D.C.Plate Voltage                                                                1000                             1250

D.C.Grid Voltage(Approx)                                                    -72                               -90

Load Resistance ( hhms per tube)                                 1250                              1675

Effective Load Resistance ( plate to plate) (ohms)       5000                             6700

Zero Signal Plate Current( ma.)                                        60                                  50

Peak A.F. Grid to Grid Voltage( Approx.)                           344                               380

Max. Signal D.C. Plate Current( ma.)                                400                                400

Max. Signal Plate Input ( watts)                                          400                                500

Max. Signal Power output ( watts)                                     240                                 320