For the low channels (2 to 6) the coil is formed by 5 turns of wire 20 or 22 in a form of 1 cm without core. For high channels (7 to 13) the coil is formed by 2 turns of the same wire in the same shape. The antenna must be 10 to 30 cm and the capacitors must all be ceramic. The composite video signal has the modulation adjusted in the trimpot. The range is 20 to 50 meters.
