That trick is usually used for FM radios according to other comments. FM radio is in the VHF band, so that would probably also work for VHF TV broadcasts too (m

That trick is usually used for FM radios according to other comments. FM radio is in the VHF band, so that would probably also work for VHF TV broadcasts too (more so low VHF than high VHF). I doubt that it would work for UHF, although someone who has actually used it would need to confirm that. Most TV channels are on UHF and nearly all antennas are designed for UHF. They are able to get poor reception of the high VHF channels and no reception of the low VHF channels. The "world's smallest" TV antenna that I linked should have been designed for UHF too.