antenna communication digital dish dth modulation network radio receiver signal transmission tv wireless auto car drive roof send transmit travel vehicle access AM-broadcast-band AM-radio amplitude-modulation (AM) antique broadcast broadcasting circuitry communicating console-tube-radio floor-standing frequencies frequency-range front- faceplate high-frequency (HF) information informative long-wave (LW) longwave medium-frequency (MF) medium-wave (MW) multiband-radio radio-bands radio-frequencies radio-waves range-of-frequencies short-wave (SW) tubes valves vintage waveband wavelength world-access worldwide deteriorating dirty disused inside neglected parts weathered complex connections wiring