The signals from this circuit obtained from the 1965 Radio Shack documentation are picked up from a medium wave receiver. L1 and L2 have 80 to 100 turns of yarn 28 on a ferrite rod.
This circuit with a common FET generates signals around 1 MHz, depending on the crystal used. We...
This circuit is valid for the 240 V network but can be changed for other networks. Potentiometer can be...
This is the basic configuration of an operational amplifier amplifying signals from a photo diode....