Duo-Spiral Hetro-Loop Antenna Radio Units Inc.; Maywood, IL, build

MAGNETIC LOOP 40M - 10M Built by 2E0ERO

Receive Active Loop Antenna – M0TAZ

Detailed dimensions of the dual-loop antenna unbent into a planar

Radio News 1924 10 R, PDF, Mail

Implantable Rx loop antenna (a) Geometry, dimensions: LR=WR=12mm

Build an Active AM Broadcast Ferrite Antenna /w Phase Loop

Duo-Spiral Hetro-Loop Antenna Radio Units Inc.; Maywood, IL, build

File:Vintage Duo-Spiral Loop Antenna By Radio Units, Inc., Maywood, Ill., Circa 1920s (14969446205).jpg - Wikimedia Commons

MAGNETIC LOOP 40M - 10M Built by 2E0ERO