PSVANE 6CA7-TII Vacuum Tube Mark TII Series HIFI EXQUIS Factory Matched EL34 6CA7 EL34B Electron Lamp

Psvane MARK TII Series have two sub version: TII Classic version Or TII Collector version

The difference between Classic version and Collector version : It's from the same production line, the best appearance, the best electronic parameters and the timeproof tubes will be selected to Collector Version. The standard quality tube will class to Classic Version. 

​There are the same selection method in the vintage tube, like telefunken select the best ECC83 to create E803CC, Mazda select the best 12AX7 to create their 5 star 3 mica 12AX7 for military or other important instrument use case(HIFI EXQUIS Co, Ltd)

High performance audio output pentode(HIFI EXQUIS co, Limited)

The anode dissipation power limit is 25 w

single tube in any audio amplifier Class A1 amplifier output power greater than 10 w, when dual tube as Class AB1 amplifier output power greater than 35 w.

6CA7 - TII and EL34 are similar, can be used interchangeably.

Filament heating(HIFI EXQUIS co, Limited)
UH……………………………6.3 V
IH……………………………1.5 A

static parameter
Ua…………………………… 250 V
Ug2……………………………250 V
Ug3…………………………… 0 V
-Ug1…………………………12.2 V(HIFI EXQUIS co, Limited)
Ia…………………………… 100 mA
Gm…………………………… 11 mA/V
ri…………………………… 15 kΩ
μg1-g2………………………11    

Limit rating(HIFI EXQUIS co, Limited)

anode voltage………………… 800 V
anode dissipation power………25 W
The second grid voltage………………… 500 V
The first grid voltage...………………… -100 V
The second grid power dissipation…………… 8 W
cathode current………………………150 mA

The first grid resistance(HIFI EXQUIS co, Limited)

automatic bias………………………0.7 MΩ
fixed bias……………………0.5 MΩ

filament cathode voltage………………±100 V
Glass shell temperature………………………250(HIFI EXQUIS co, Limited)

interelectrode capacitance
input capacitance…………………… 15.2 PF
output capacitance…………………… 8.4 PF
transfer capacitance…………………… 1.1 PF
The first grid capacitance of the wire……… 1.0 PF
Filament cathode capacitance…………… 10 PF

Recommend working status (reference)(HIFI EXQUIS co, Limited)

Single tube Class A1 amplification (fixed bias)

Ua(b) …………………… 265 265 V
Ua……………………………250 250 V
Ug2……………………… Rg2=2k Rg2=0 
Ug3……………………………0 0 V
-Ug1……………………… 14.5 13.5 V
Ia(0) ………………………70 100 mA(HIFI EXQUIS co, Limited)
Ig2(0) …………………… 10 14.9 mA
Gm…………………………… 9 11 mA/V
ri……………………………18 15 kΩ
RL…………………………… 3 2 kΩ
Pout………………………… 8 11 W
Dtot…………………………10 10 %

Push-pull B1 class amplification (fixed bias)
Ua……………………………375 400 V
Rg2………………………… 600 800 Ω
Ug3………………………… 0 0 V
-Ug1………………………… 33 36 V
Ia(0) …………………2×30 2×30 mA
Ia(maxsig) ………2×107.5 2×110.5 mA(HIFI EXQUIS co, Limited)
Ig2(0) ………………2×4.7 2×4.5 mA
Ig2(maxsig) ………2×23.5 2×23 mA
Rl(a-a) ………………3.5 3.5 kΩ
U(g1-g1)(r.M.S) ……… 46.7 50 V
Pout……………………48 54 W
Dtot……………………2.8 1.6 %
Rg2 is two tubes shared.

Push-pull Class B1 amplification superlinear connection (self bias)
(43% tapping points)(HIFI EXQUIS co, Limited)
Ua………………………………430 V
Rg2…………………………… 2×1 kΩ
Ia(0) ………………………2×62.5 mA
Ia(max.sig) ……………… 2×65 mA
Ig2(0) ………………………2×10 mA
Ig2(max.sig) …………… 2×10.2 mA
Rk……………………………2×470 Ω
Ug1-g1)(r.M.S) ……………35 V
RL(a-a) ……………………… 6 kΩ(HIFI EXQUIS co, Limited)
Pout……………………………20 W
Dtot………………………… 0.35 %