Dr Marco Langbroek on X: "@Polasokeri @NickAstronomer First is the 137 MHz antenna. Reflectors 27 cm below the dipole. Second is the 415 MHz antenna. Made for less than EUR 20,- in
Turnstile antenna for 137 MHz assembled | csete | Flickr
Just built myself a 137 MHz QFH antenna. : r/RTLSDR