Acoustic Guitar Amplifiers & Preamps / Preamps
DIY genuine factory precision matching four-way
Heater
Uh-----------------6.3 volts
Current value------------------1.6A
Maximum Ratings Ratings Maximum
Ua------------------------------ 800 800 V
Ug2-------------------------- 600 600 V
Ug1-------------------------- 200 -200 V
Pa-----------------------------42 35V
Page 2 ---------------- 8 6 W
Pa+Pg2-------------------- 46 40 W
Ik---------------------------- 230 230 mA
Uhk------------------------ 200 250 V
T Glass shell ------------------- 250 250
Reference 1
Cathode bias Pa+Pg2 35W------0.47M
Pascal+Pg2>35W---------0.27m
Fixed bias voltage Pa+Pg235W-----------0.22 M
Pascal+Pg2>35W ----------0.10m
capacitance
Pentode connection Triode connection
Xin--------------16 9.3 PF
Referee------------12 17 PF
Cg-a-------------1.2 7.9 PF
feature
Pentode connection
Voltage source: 250V
Ug2--------------250V
Current----------------140 mA
Ig2 (approx.) ---- 3 mA
-Ug1 (approx.) -- 15 V
Gm---------------12 mA/V
12 K
g1-g2--------8
Connection of transistor
Ua.g2-------------250V
Ia+g2-------------143 mA
-Ug1(approx.)---15 V
On-state voltage: 12 mA/V
Day------------------670
------------------ 8