Tom from MusicRadar writes in to tell us about musician Gordon Charlton. Charlton figured out how to produce “Theremin-like” sounds by manipulating the feedback produced by certain brands of walkie-talkie:
He simply turns the handsets on and moves them closer together and further apart. The pitch of the feedback that’s created changes accordingly. That’s all there is to it, really – there’s no circuit-bending or other modification involved in this. Gordon uses a pair of Binatone Latitude 150 walkie-talkies (pictured below) that you can pick up for less than £20, but presumably, any model would do.