剛為客人完成了的特製SIEMENS F2a11 PP 40W mono block power amplifier .

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剛為客人完成了的特製SIEMENS F2a11 PP 40W mono block power amplifier .
http://www.ys-audio.com/scor.htm

4支SIEMENS F2a11 power管由客人提供.
這管PP 自給偏壓, 5極接法, 實測足40W.

12AU7x2 input and driver tubes
5AR4膽整流
Amtrans Golden Black coupling capacitor
Hasimoto HW-60-5 CUT CORE orient high B output transformer , made in Japan
Hasimoto C-10-200W CUT CORE Choke
Hasimoto Special Power Transformer

Specifications

Output and T.H.D :
1W, 1kHz total harmonic distortion typically 0.08% (0.3% at 20Hz , 0.07% at 20KHz)
40W per channel , 1kHz total harmonic distortion typically 1.5% (rated output)

Input : RCA

Input Impedance : RCA is 100K ohm

Frequency Response:

Test at 1W 20Hz ~ 100kHz (20Hz -0.45dB, 20kHz -0dB, 100KHz -2dB)
Test at 40W 20Hz ~ 80kHz (20Hz -0.6dB, 20kHz -0.3dB, 100KHz -2.4dB)

Input Sensitivity : 0.84V / 40W (rated output)

Output impedance : 4 ohm, 8ohm , 16ohm

Noise: Less than 1mV
Phase Mode : Normal
Construction: Copper and High quality aluminum

Tubes Required: 12AU7 x4 , F2a11 x 4, 5AR4(GZ34) x 2
Dimension: 430mm x 340mm x 240mm (W x D x H)

Total Weight: 30kg
Power Source: 220-240V,50/60Hz