Can I use coax-fed antennas like a dipole, yagi, or non-grounded vertical with the EDX-2 ?
Absolutely NOT! Please understand that the EDX-2 is a “random length long-wire resonator”, and the “Long-wire” antenna starts from the input side of the EDX-2 (feeding-point), not from the output terminal. It resonates the antenna impedance automatically to the length of the wire or mobile whip you have connected to the output terminal. A grounded multi-band mobile whip such as the Out Backer works fine with the EDX-2, as long as it is fed with a single wire from the output terminal of the EDX-2 to its center feeding-point. If you need an antenna tuner for a coax-fed antenna, we offer EDX-1 manual tuner.