KT66 Electron Tube KT88/6L6 Vacuum Tube(KT66 GE,2 pcs)

Preamps
Beam power tetrode KT66GC/KT66GE, anode maximum dissipation power is 25W, used for A1, AB1, AB2 class amplification of audio amplifiers. Hot wire heating
Uh...6.3 volts
Medium to high...1.27
Final Rating
Tetraode connection Triode connection
Anode voltage..................500V 400V
The second gate voltage...
Anode power dissipation............25W 25W
Second gate power dissipation......3.5W
Cathode current....................200 mA
Hot wire cathode voltage.........100V
First gate resistor
Under self-bias voltage
0.5 m
Fixed bias
0.1 m
Interelectrode capacitance
Tetraode connection Triode connection
Input capacitance.........16 8.7 pF
Output capacitor.........11.5 15.8 pF
Capacitance across the circuit......... 1.1 7.2 PF
Static parameters
-Ug1(approx.)...15V
Gm........................6.3mA/V
Miles...................... 22.5K
Tempering time 2.2K
Pout...7.25W
Total ................................ 9.0%
Recommended working status (reference value)
Single tube A1 class amplification, triode connection
Ua, g2 ........................ 400 250 V
-Ug1............3819V
Rk (per tube) .... 600 350
Hysteresis ................................. 4.5 2.75 thousand
Ia(0)........................ 63mA 60mA
On-resistance.................5.5 mA/V/
Miles............................ 14.5K /
Output power.................. 5.8W 2.2W
Total ................ 7% 6.0%
Push-pull tube A1 class amplification, triode connection
Ua, g2 ........................ 400 250 V
-Ug1............3820V
Rk (per tube) .... 600 360
RL.................4 2.5 thousand
Ia(0)........................ 2X 62.5mA 2X 55Ma
(g1-g1.pk)........................ 80V 40V
Output power..................14.5W 4.5W
Total dry weight................................3.5% 4.5%
Push-type AB1 class amplification, ultra-linear connection
Fixed bias self bias
UA......................552 450 Volts
Ug2 ...................... 525 425 V
-Ug1............67 35V
Luke................................. 560 /
RL (AA) ....8 7 thousand/
(G1-G1.pk)......127 volts
Ia+g2(0) ........................ 2×35 2×62.5 mA
Ig+Ig2(max.sig)......2×80 2×72.5 mA
Pout....................50 32W
Total...............32%