SCR Rain or Leak Alarm (CB22097E)

This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and the transistor a BC548.

Window Comparator 741 (CB5076E)
This conventional window comparator configuration was found in an old documentation. It is valid...
DC Amplifier 1 (CB21902E)
This circuit for analog instruments was found in a Raytheon documentation from the 1960s....
Two-Wave Radio (CB16395E)
This circuit in a receiver that allows the capture of distant stations with short waves. The...