LED beacon (CB20490E)

This sole beacon which has a battery charged by photocells was found in documentation from 1991. The LEDs flash at the frequency given by C2.

High Gain Preamplfier (MSB023E)
A 25 mVpp applied to the input of this circuit produces in the output a 1 Vpp signal. The...
Log Voltmeter (CB903E)
This circuit has a logarithmic response sourcing signals to na analog meter. The meter is a 200 µA or...
Signal Generator (CB3820E)
We find this simple tone modulated signal generator in a 1987 publication. It uses common...