Early Electronic Reversing Unit Problems

Started by flatcar51, March 10, 2024, 02:39:23 PM

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Hi I have an Early Williams reversing unit. Anybody have an non working board or a Schematic on these or know where to find them. A little research has produced that these board are based on a design by Kenneth and David Ott. A sort of simple schematic was published in a 1994 patent. I am looking for the values of the components  connecting up to the HFC4017 Counter chip, see Included Picture components with a ? are the values I am after.
Any Help  is very much appreciated


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It would seem simpler to just replace the reverse board with a newer one with the same functionality.


If at first you don't succeed, throw it in the spare parts box.