This is a Preselector for SW receivers (diy hf preselector) circuit. The entry low capacitance of MOSFET modern, with two gates, will create negative inverse reaction through a uncoupled source ...

Surprise! Shortwave radio as a broadcast medium is holding its own, despite the intrusion of the internet, transmission cutbacks by major broadcasters such as the BBC World Service and Voice of ...

The challenges of precision-tuning analog radios, plus the reliance of international shortwave broadcasters on switching between multiple frequencies and bands to reach global audiences 24/7, explains ...