PA0FRI Active Antenna Redux - The final version?
I recently worked on a PA0FRI Active Antenna design with fast BFR93A / BFR106 transistors. Design 3D render: Schematic: Previous Next / [pdf] View the PDF file here. Simulation Results ...
Active Antenna
HFDY Active Loop - LZ1AQ loop clone
The HFDY Active Loop is working extremely well and that too from an indoor location in MK68! Pretty awesome ;) Design I am running the loop at 5V (via a regulated linear power supply) currently where it consumes slightly less than 65mA of current. The recommended voltage is 10V, which I will shift to soon. Results I am using Airspy HF+ Discovery SDR for this experiment. ...
My PA0FRI Active Antenna
My homebrewed PA0FRI Active Antenna is working well from a very physically constrained location. Design 3D render: Schematic: Results The antenna is connected to a RSP1 Clone SDR which is running custom FT8-band-hopping software. I am using a SOLID 4-Way 5-2400 MHz RF splitter to connect multiple SDRs to the same active antenna. NB: Plug in 75-ohms dummy loads (terminators) on the unused ports of the RF splitter - MX-282 / MX-280 75-ohms dummy loads work fine. ...