Triode: 2A3C (2A3)Compatible with: 2A3B

 

Two tubes for a matched pair

Four tubes for a matched quad 

 

DESCRIPTION

2A3Cis compatible with2A3and 2A3B. Direct heating cathode and low power consumption. Two triodes can be used for class A and AB amplification.

 

FEATURES

l          Gold-plated pins, ceramic tube socket

l          Using high transparency tube envelop of 300B

l          New design of filament hooking

l          High evacuated tube, make it more stable and reliable.

l          Fix three layer mica film provides firm inner structure for anti-vibration and reduces microphone effect.

 

SPECIFICATION

Filament Heating
Uf ……………………… 2.5 V
If…………………………2.5 A

Maximum Ratings
Plate voltage…………………………300 V
Plate dissipation power…………………………15 W
Grid resistance
When it is self-biasing voltage…………………………0.5 M
When it is fix biasing voltage…………………………0.05 M

Capacitances
Input capacitance………………………… 7.5 PF
Output capacitance…………………………16.5 PF
Muller capacitance…………………………5.5 PF

DC Parameters
Ua………………………… 300 V
-Ug………………………… 45 V
Ia………………………… 60 mA
Gm………………………… 5.25 mA/V
ri………………………… 0.8 k
u………………………… 4.2
Pout…………………………3.5 W

Recommended Operating Condition (reference value)
Single tube for class A amplifying(fix biasing voltage)
Ua………………… 250 V
-Ug……………………45 V
RL……………………2.5 k
Ia(0)…………………60 mA
Gm……………………5.25 Ma/V
ri……………………0.8 K
u……………………4.2
Pout……………………3.5 W
Dtot……………………5 %
For class AB amplifier
          fixed biasing   self-biasing
Ua……………300   300 V
-Ug……..…62         Rk=780  V
RL……………3      5 k
üg(pk)………87      110 V
Ia(0)…………80     80 mA
Ia(max.sig)…140  100mA
Pout……………15   10 W
Dtot……………2.5   5 %