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Now downloading free:PassLabs Aleph2


Download PassLabs Aleph2 docs - Audio equipment,digital audio, home audio, professional audio systems service manuals and repair information


File information:
File name:PassLabs-Aleph2 pwramp.pdf
[preview Aleph2]
Size:521 kB
Extension:pdf
MD5:64b511360436540fac4e971e60618cf4
Mfg:PassLabs
Model:Aleph2 🔎
Original:
Descr:power amplifier
Group:Electronics > Consumer electronics > Audio >
Uploaded:25-01-2010
User:AndyMn
Multipart:No multipart

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PassLabs-Aleph2 pwramp.pdfPass Laboratories Aleph 2 Service Manual Rev 0 2/1/96 Aleph 2 Service Manual. The Aleph 2 is a monoblock 100 watt audio power amplifier which operates in single-ended class A mode. The Aleph 2 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 3 amps. The voltage rails of the supply are at 45 volts, and each channel draws approximately 300 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

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