Cool Electronics Circuits
Electronic Circuit Ideas Collection.
Tuesday, March 24, 2026
RW4HFN Balcony Antenna for the 20-Meter Band
RW4HFN Balcony Antenna for the 20-Meter Band: Discover the RW4HFN balcony antenna design for the 20-meter amateur radio band—ideal for limited spaces. Includes schematic, dimensions, and inductance values
Shortened G5RV Antenna – DX Power in a Smaller Package
Shortened G5RV Antenna – DX Power in a Smaller Package: A compact, multi-band wire antenna based on the legendary G5RV design —specifically, a shortened version of G5RV antenna optimized for the 14-50 MHz range.
Mosquito TRX: Single-MOSFET 40-Meter (7030 kHz) CW Transceiver
Mosquito TRX: Single-MOSFET 40-Meter (7030 kHz) CW Transceiver: Detailed explanation of Mosquito TRX circuit. Learn how the IRF510acts as crystal oscillator/PA for QRP transmission and direct conversion mixer for 7030 kHz
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