Frequency Counter [Deleted]

I built this frequency counter many years ago, maybe about 1976. I designed the entire thing myself as a student and built it somewhat shoddily but it is still working today. I only had some shabby hand-drawn schematics and I decided to take the trouble to draw them anew. Doing the re-drawing brought back some pleasant memories.

Many values of components are not shown because they were not in the original drawings. Also maybe some are not reliable because it was all an experiment and may...

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