This circuit was found in a 90s Popular Electronics. The circuit uses components from that time, intended to receive signals in the range of 150 to 250 kHz.
This amplifier was found in a Radio Electronics of the 90s. The circuit uses unusual operational...
When switching on, the output voltage of this regulator rises slowly until it reaches 15 V. The...
Found in a 90s documentation, this circuit makes use of D1, a switching diode that is uncommon today....