Metal locator (CB7506E)

This simple metal detector was found in a 1960 Sylvania transistor manual. The phone must be high impedance or crystal.

Sinusoidal generator CA3130 (CB21988E)
This interesting op-amp signal generator circuit was found in a 1977 documentation. The circuit has...
DGD Gate Drivers
May 2017 - In stock at Mouser Electronics DGD Dgate drivers from Diodes Incorptrated ara...
JFET Touch Shield (CB19559E)
This circuit can be used as a shield for touch control. The circuit can use any common FET like...