Radio with amplifier (CB20486E)

We found this circuit in a publication of 1991. The audio amplifier is an operational that admits equivalent.

High Impedance Probe (CB6454E)
Originally suggested by Electronic Design in a 1965 documentation for use with oscilloscopes, this probe has...
Integrated FM Radio (CB14571E)
This circuit uses currently uncommon components, including the 10.7 MHz (FI) filter. This circuit was...
LASCR Tachometer (CB9351E)
This optical tachometer with LASCR was found in a 1965 General Electric documentation. The diode at...