Shuguang Treasure 2A3C-Z Vacuum tube Matched Pair Collection

Shuguang Treasure 2A3C-Z electron tubes can replace of 2A3 Best Matched Pair 100% Brand new
The price is for a Best Matched Pair of Shuguang Treasure 2A3C-Z vacuum tubes. 
If you buy 2pair(4 pcs), we will send the Factory Full Matched tubes to you.

Shuguang Treasure 2A3C-Z is a directly-heated cathode power dual triode tubes. Work on Class A1, AB1 amplifier. 


Feature: 
Using "High Polymer Compound Carbon (HPCC)" technology; 
Using "Super Alloy " technology; 
Improve the vacuum extraction technology, effectively improve the vacuum; 
Gold gate, gold-plated pin, white porcelain seat; 
Using new materials and processes 
2A3C-Z and 2A3 are similar, can be used interchangeably. 


Specification: 

Filament heating 
Uf ......... 2.5 V 
If ......... 2.5 A 

Limit rating 
Anode voltage ......... 300 V 
Anode dissipation power ......... 15 W 
Gate resistance 
Self-bias ......... 0.5 MΩ 
Fixed bias when ......... 0.05 MΩ 

Pole capacitance 
Input Capacitance ......... 7.5 PF 
Output Capacitance ......... 16.5 PF 
Cross-circuit capacitance ......... 5.5 PF 

Static parameters 
Ua ......... 300 V 
-Ug ......... 45 V 
Ia 60 mA 
Gm 5.25 mA / V 
ri 0.8 kΩ 
μ ......... 4.2 
Pout ......... 3.5 W 



Recommended working status (reference value) 
Single tube Class A1 amplifier (fixed bias) 
Ua ....... 250 V 
-Ug ... 45 V 
RL ... 2.5 kΩ 
Ia (0) 60 mA 
Gm ... 5.25 Ma / V 
ri . 0.8 Kω 
μ . 4.2 
Pout ... 3.5 W 
Dtot ... 5% 

Push-pull Class AB1 amplifier 

Fixed bias self-bias 
Ua ........ 300 300 V 
-Ug ........ 62 Rk = 780Ω V 
RL ........ 3 5 kΩ 
üg (pk) .. 87 110 V 
Ia (0) ..... 80 80 mA 
Ia (max.sig) ... 140 100 mA 
Pout ........ 15 10 W 
Dtot ........ 2.5 5%