Lan-Alog Type LA-4
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The Lan-Alog computer was designed to teach analogue computing techniques to students in mathematics, engineering, and applied sciences. The computer contains four encapsulated operational amplifiers, employing silicon epitaxial transistors and a voltmeter. The various components can be connected in a variety of ways using patch cords.
The amplifier fitted in the Lan-Alog LA-4 has an open-loop gain of 50,000, ensuring a basic computing accuracy of better than 1% per amplifier. The overall accuracy of computation also depends on the quality of the resistors and capacitors used - the Lan-Alog manual claims better than +/-3% in all conditions.
All components are mounted on a steel panel, measuring 19 x 10.5 inches and the panel is drilled such that it may be fixed vertically on a standard 19-inch rack.
Our example has the Analog Computer Handbook and a 5 pin DIN type power connector to link unit to unit.
Manufacturer: Lan-Electronics Ltd
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This exhibit has a reference ID of CH35971. Please quote this reference ID in any communication with the Centre for Computing History.