This amplifier with the LM1098 and LM101 by Motorola from a 1990 manual can be designed with more modern operations. The bandpass for small signals is 3.5 MHz and the power range is 250 kHz.
This simple circuit controls the brightness of an LED from LDRs, NTCs, PTCs or other resistive sensors....
This remote listening device was found in documentation from the 50's. The transistors used are...
This circuit came out in a Modern Electronics from June 1990. In it we have a low frequency...