Typical Shortwave antenna reel antenna modification

Ultimate Shortwave Coil Up Antenna - Overstock Sale! ( GP-5 & GP-7 Uni – CountyComm

Teardown, Modification: Sony AN-LP1 Active Loop Antenna

20W Loop Antenna Low Noise 5-30MHz SWR Shortwave Radio Antenna Adjustable Small SWR Loop Antenna Replacement for HF Transceivers

The Shortwave Antenna - How It Works - Which Ones Work Best

Tecsun Radio Antenna Reel Shortwave Receiver Wire PL-660,PL-330,550,500,etc

The T1 external antenna will boost indoor reception on portable FM, shortwave and NOAA weather band radios that have a telescopic antenna or 3.5 mm

Kaito T-1 Compact Reel Antenna - Indoor FM, SW & Weatherband Reception Boost - 23 ft.

The Shortwave Antenna - How It Works - Which Ones Work Best

Battle of the Under $100 Shortwave Radios

Tecsun PL-880 The SWLing Post