This circuit from the 70s uses components from that time. The converter and SAR are components that are difficult to obtain today.
Found in 1965 General Electric documentation this circuit applies to a LASCR used as an optical...
This circuit, which can be used as a shield, was found in Radio Electronics from the 90s. The...
This preamplifier is intended for the use with magnetic pick-ups. Power supply must have voltages...