Amplifier for ceramic capsule (CB9059E)

Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time. This component is uncommon today.

General purpose RF detector (CB8484E)
Found in a 90s English documentation, this circuit consists of an RF detector for testing in RF...
Shutdown for exhausted battery (CB8387S)
When the 24 V battery voltage drops below 18 V, this circuit cuts off its discharge. The circuit...
Audible warning (CB9204E)
This circuit that generates a special sound was found in a Popular Electronics from the 90s. The...