WellGood Loop HF antenna project by G8OCV & M1GEO
will work for receiving shortwave HF/SSB/AM radios
The loop on the original antenna was made using RG58, with the outer screen used as the loop, and the inner conductor not connected. This was then supported in a plastic pipe. Others have reported that their loops were made with a clip together metal ring. The diameter should be around 1 metre, and thus around 3.14 metres of material is needed to create the loop circumference. Ideally, you want for the loop conductor to have a largish diameter. A tube or coax screen will outperform a small piece of wire.
BNC connector for RF
Dimension (cased) - 82*54*28 mm
Power supply - 12V (>200mA)
PCB dimension - 60*45 mm
Full information - https://www.george-smart.co.uk/projects/wellgood_loop/
Interactive BOM - http://ra0sms-shop.ru/wellgood_pcb.html