Operated directly from the power grid, this detector was found in an 80's RCA documentation. The sensor is an ionization chamber. The SCR triggers a warning siren.
This simple circuit with sensors formed by bars or separate screens triggers in the presence of...
This circuit is from a 1967 RCA documentation. Components can be replaced with modern equivalents. The...
This circuit allows you to view two low frequency signals on a single channel oscilloscope. It was...