1940s commercial receiver (T1618E)

This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.

TPS56C215 SWIFT Converter Step Down (COM025E)
June 2016 – Mouser Electronics already have in stock the TPS56C215 converter from Texas...
Panic button (CB7077E)
Found in a 1968 Motorola publication, this circuit generates a high-powered audio tone when...
Automatic start for LASER (CB7226E)
This circuit, of a Popular Electronics of 1969 is destined to firing a gas LASER of the time. The...