[Bob] already has an inconspicuous coax connector mounted on the outside of his house with an antenna tuner that normally runs his end-fed sloper antenna, which also looks like it includes a ...

My HF 0 dBm (1 mW) signal into an endfed sloper antenna was heard a few hundred to 1500 km away! Note: You'll probably need an amateur radio license to transmit on HF! Also check your output for ...