Specifications:
Frequency Response: 50Hz - 20kHz (-3dB)
Input sensitivity: 0.3 V
Input Impedance: 250k
Supply Voltage: 250 - 280 VDC/35-45mA
Power Output:3 Watt Max.
Tube: ECL82/6BM8
OTHER PARTS:
Resistors (0.25W 5% unless noted otherwise):
R1 = 2.2K
R2 = 220K
R3 = 820K
R4 = 560R/1W
R5 = 33K
R6 = 33K/0.5W
R7 = 1K
Rs = series resistor 470 Ohms 2 Watts (see note* below)
Capacitors:
C1 = 0.22uF/100-250V film cap
C2 = 0.033uF/400V film cap
C3 = 100pF/100-1000V film or ceramic
C4 = 220uF/25-50V electrolytic
C5 = 0.01uF/400-630V film
Semiconductors:
BR1 = rectifier bridge 400V/1A (Fig.3)
D1, D2 = 1N4007 (Fig.4)
Misc.: fuse holder, Fu1 0.2A MDL, Fu2 0.1A AGC, rubber feet.
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http://lh-electric.net/projects/tiny3w.html
