No way I could connect this post to color TV so I'm not even going to try
The most basic non-active non-germanium non-silicon diode receiver I can conjure up is from my youth: a 50-foot length of antenna wire coupled to a hand-wound inductor grounded to a water pipe and feeding a razor blade/graphite detector (pencil 'lead' touching a Gillette razor blade -- Bright Star brand worked best but Gillette's were easier to get) with a single 'high impedance' earphone.