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

4.6 (327) · $ 11.50 · In stock

Spiral loop

Antenna

Spiral loop

Dave's Homemade Loop Antennas - IW5EDI Simone - Ham-Radio

Spiral loop

MAGNETIC LOOP 40M - 10M Built by 2E0ERO

MAGNETIC LOOP 40M - 10M Built by 2E0ERO

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

Build an Active AM Broadcast Ferrite Antenna /w Phase Loop

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

MAGNETIC LOOP 40M - 10M Built by 2E0ERO

Small Loop Antennas - IW5EDI Simone - Ham-Radio

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

Spiral loop