Placed near a common receiver, this oscillator is intended to generate a beating signal to receive RTTY or SSB communications. The circuit is from old telecommunications documentation.
This circuit was found in old English documentation. The sensor is a 1M NTC. The circuit has...
This circuit is from an English magazine of 1974, but can still be assembled with the replacement of...
In the figure we have a small general-purpose amplifier with the LM386 integrated circuit and...