This Concepts and Requirements Document proposes the design and construction of a versatile and simple audio amplifier to be used as test equipment. A working prototype will be developed which could be further refined into a commercial product. In addition, the project will provide electronics students with valuable experience in design, fabrication and troubleshooting.

The project will have the following objectives: inexpensive to produce, reliable, safe, versatile and simple to operate. These objectives will be met in the following ways:

The student will be responsible for design, drawings, experimentation, prototyping, testing, construction and documentation. Due dates for each phase are to be assigned by the instructor.

When switch S1 is closed, the amplifier is powered up. A line level signal is introduced to the amplifier thru means of banana jacks on the enclosure. The input signal level is controlled by R4 which is part of S1. The unbalanced signal enters the IC via pin1, which is the non-inverting input of the op-amp. The output exits via pin 4 where a feedback loop returns to pin 2, the inverting input. The feedback passes thru an RC circuit which provides increased gain at higher input signal frequencies. Capacitors C3 and C4 provide noise suppression. C5 isolates DC voltage from the output signal. The unbalanced signal exits C5 to a banana jack whose companion jack is referenced to ground.