Analog hybrid computers are an unusual type of computer that is heavily focused towards analog calculations, such as multi-variable differential equations, perfect for scientific calculations. Input variables and results can be recorded to digital memory for future recall. These hybrid computers had a reputations for using lots of electrical power to run the power amplifiers in each of the function modules.
Hitatchi 505 Operation
The computer basically consists of solid-state D.C. amplifiers provided with FET chopper circuits. These amplifiers have a 100 volt 20 ma output with low drift and high S/N ratio for high accuracy. Iterative computations are facilitated by special Compiled Operation Modules containing networks used in automatic parameter changing, boundary value problems and other functions necessary in iterative operations.
A large selection of function generators is available for special purposes, including: 3 different fixed breakpoint function generators; 1 variable breakpoint function generator; 2 log function generators; 2X2 function generators; and a new two-variable function generator. The two-variable function generator, in particular, is a novel silicon transistor device featuring 25 non-interacting fixed breakpoints. The completely shielded, color coded patchboard has been designed with the programmer in mind. Most connections may be made with low capacity bottle plugs. Also, a unique method for temporary labeling of the potentiometers is provided.
Programming the Hitatchi 505
FIVE STEPS IN ANALYSIS OF
PROBLEMS USING THE HITACHI 505
Readout of solutions is obtained with a 4 digit DVM or a 3 channel 9” oscilloscope. The solutions are also available externally for a X-Y plotter or other monitoring devices. The Hitachi 505 furnishes a number of functions that permit efficiency and flexibility over a wide range of applications. A three-channel 9” oscilloscope provides a continuous display of solutions, and is arranged so that 3 solutions may be observed simultaneously.