This CW circuit was found in a Radio Amateur Today from the 890s. The CMOS circuit must be powered by an isolated source and has different dash and dot timings.
This is a typical RF oscillator configuration found in a 1980s documentation. The frequency...
The purpose of this circuit is to detect output signals from a transmitter for the frequency range...
We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from...