Potentiometer module for Analog Paradigm Model-1 computer.
The PT8-module contains eight precision potentiometers, one of which (number eight) can be used as a so-called "free potentiometer" as both of its inputs are available at the front while the other seven potentiometers act as pure coefficient potentiometers with one input each. If potentiometer eight is to be used as such a coefficient potentiometer, its INb input must be connected to the ground jack below. Also available on front panel jacks are the machine units which simplifies patching constants which may be used as initial conditions for integrators.
See also the DPT module for digitally controlled potentiometers.