This board is a single integrating one shot with zero recovery time. This allows the output pulse to be extended indefinite by retriggering. This can be used to detect gaps in pulse trains or when a signal is below a frequency threshold. Delay range is 3.5 microseconds to .7 seconds
This board cost $45 in 1968.
Feel free to contact me, David Gesswein email@example.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.
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