antenna advice;

I have no idea what this antenna does or what it was used for. Does anyone here recognize it? Can it be repurposed?

Hello. Can you run a single coax cable to your roof (of a home) and then have a splitter to have multiple antennas? I have a CB, Ham, and scanner radio and would like to put up an antenna for each. But does that mean I need three coax cables? I already have a coax going to the attic (connected...

I'm a shortwave listener - interested mostly in hams and broadcasters below 30MHz. My receiver is an RSP2Pro (software-defined receiver). I have erected a U-shaped, end-fed longwire antenna - total length about 75 feet, all segments of the U are approximately equal in length. (I chose this...