Metal detector receiver (CB22457E)

Found at Popular Electronics this receiver is used with a transmitter for quadrature-coil signals.

Bilateral current source (CB20359E)
Settings like this can be found in this section and on this website, but from different sources of...
Low Power Bluetooth Modules
June 2017 - Mouser Electronics announced the availability of new low-power Bluetooth modules from...
10 W amplifier MCF8020 (CB20043E)
Motorola's integrated circuit used in this' 70s amplifier is no longer common today. Neither do...