We found this circuit in the December 1998 issue of Electronics Now magazine. RF transistors such as the BF494 or BF495 can be used. The circuit works at lower frequencies.
This simple radio uses few components due the direct coupling of the transistors. Coil is formed...
The inverter circuit shown in the figure provides a voltage of around 110 V with a rectangular waveform...
This circuit operates at a frequency of 80 KHz and modulation up to 60 kHz. The circuit is from...