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Now downloading free:PassLabs Aleph5


Download PassLabs Aleph5 docs - Audio equipment,digital audio, home audio, professional audio systems service manuals and repair information


File information:
File name:PassLabs-Aleph5 pwramp.pdf
[preview Aleph5]
Size:283 kB
Extension:pdf
MD5:67aead9af6770fbfc6bb15df89a683e8
Mfg:PassLabs
Model:Aleph5 🔎
Original:
Descr:power amplifier
Group:Electronics > Consumer electronics > Audio >
Uploaded:25-01-2010
User:AndyMn
Multipart:No multipart

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PassLabs-Aleph5 pwramp.pdfPass Laboratories Aleph 5 Service Manual Rev 0 9/20/96 Aleph 5 Service Manual. The Aleph 5 is a stereo 60 watt audio power amplifier which operates in single-ended class A mode. The Aleph 5 has only two gain stages which are biased by current sources. Because of the inherent simplicity of the circuit, it is easy to understand and repair. There are no adjustments. Figure 1 shows the simplified schematic of the amplifier. Two p channel Mosfets form an input differential pair biased by a current source operating at about 20 ma. The drain of the input Mosfet is attached to the gate of an n channel power Mosfet which forms the active output stage. It is biased by a current source at slightly greater than 2 amps. The voltage rails of the supply are at 34 volts, and each channel draws approximately 150 watts. Figure 2 shows the actual schematic for the amplifier. F1 is a slow blow fuse, set at 4 amps for 100-120 volt operation, and 2 amps for 220-240 volt operation. S1 is the power switch, w

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