Triode: 2A3B (2A3)

 

Two tubes for a matched pair

Four tubes for a matched quad 

DESCRIPTION

2A3B is compatible with 2A3. It is direct heating cathode and low power consumption. Two triodes can be used in class A and AB amplification. The output power of single tube can reach 6.5W. High evacuated tube, it achieve high performance tube in audio frequency. 

 

FEATURES

l          New filament hooking design

l          Plate of high carbon alloy

l          Using high transparency of T16 as glass envelope

 

 

SPECIFICATION Filament Heating Uf ……………………… 2.5 V If…………………………2.5 A Maximum Ratings Plate voltage…………………………300 V Plate power dissipation…………….…15 W Grid resistance For self-biasing voltage…………………0.5 M  For fix biasing voltage…………………0.05 M Capacitances Input capacitance……………… 7.5pF Output capacitance……………16.5pF Muller capacitance…………..……5pF DC Parameters Ua………………………… 300V -Ug………………………… 45V Ia………………………… 60mA Gm………………………… 5.25mA/V ri………………………… 0.8k u………………………… 4.2 Pout…………………………3.5W Recommended Operating Conditions (suggested value)Single tube class A amplifying (fix biasing voltage) Ua………………… 250V -Ug…………………45V RL…………………2.5 k Ia(0)…………………60mA Gm………………5.25 Ma/V ri……………………0.8 K u……………………4.2 Pout…………………3.5 W Dtot……………………5 % Driving class AB amplifier                fixed biasing self-biasing Ua……………300         300 V -Ug……………62V      Rk=780 RL……………3            5 k üg(pk)………87     110 V Ia(0)…………80    80 mA Ia(max.sig)…140    100 mA Pout……………15    10 W Dtot……………2.5    5 %