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  • 2A3 TII Electron Tube 2A3 Vacuum Tube Precision Matching(2 pcs)
  • 2A3 TII Electron Tube 2A3 Vacuum Tube Precision Matching(2 pcs)
  • 2A3 TII Electron Tube 2A3 Vacuum Tube Precision Matching(2 pcs)

2A3 TII Electron Tube 2A3 Vacuum Tube Precision Matching(2 pcs)

Preamps
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    Preamps
    2A3-TII is a direct-heated cathode power dual triode, used in A1 and AB1 class amplifiers.
    Heater
    2.5V voltage
    If 2.5 A
    Maximum Ratings
    UA300 No.5
    Pa15W
    A
    Cathodic bias 0.5 M
    Fixed deviation 0.05 M
    Direct interelectrode capacitance
    Input 7.5 PF
    Output 16.5 PF
    Grid to plate 5.5 PF
    Static parameters
    UA300V
    -Ug45V
    Current 60 mA
    On-resistance 5.25 mA/V
    0.8 thousand
    4.2
    Water output 3.5W
    Recommended operating conditions (reference values)
    Class A1. Single tube. Fixed bias.
    250V
    -Ug45V
    RL2.5 thousand
    Current (0) 60 mA
    Gm5.25 mA/V
    0.8 K
    4.2
    Water output 3.5W
    Total 5%
    Push-full.class AB1
    Fixed bias cathode bias
    Ua300 300V
    -Ug62Rk=780V
    RL3 5K
    üg(pk)87110 V
    Current (0) 8080 mA
    Ia (maximum signal) 140100 mA
    Output power 15 10 watts
    Total 2.55%

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