Shuguang Vacuum Tube EL34 Series

 

Two tubes for a matched pair

Four tubes for a matched quad 

 

Tetrode: EL34-B

DESCRIPTION

Plate power dissipation of EL34-B can reach 30W, whereas EL34A is 25W. EL34-B belongs to tetrode tube compared to pentode tude of EL34A. g1 and g2 of EL34-B is not exactly aligned opposite to each other and it is used in linear power amplification.

 

SPECIFICATION Filament HeatingUH………………6.3V IH………………..1.5A Maximum RatingsPlate voltage……………..800V Second grid voltage…………..500V First grid voltage……………..-100V plate power dissipation………….25W Second grid power dissipation……8W Cathode current………………….150mA First grid resistance For selt-biasing………………..0.7M For fixed-biasing………………0.5M Filament voltage between cathode…………100V Temperature of glass envelop………………250  CapacitancesInput capacitance………………..15.2pF Output capacitance……………….8.4pF Muller capacitance……………….1.1pF First grid-heater capacitance……..1.0pF Heater filament capacitance……....10pF DC ParametersUa………………250V Ug2……………..250V Ug3………………..0V -Ug1…………….12.2V Ia……………….100mA Gm……………..11mA/V ri………………..15k ug1-g2…………..11