Spark Discharge Apparatus Ipc. An instrument useful in showing the random nature of radiation, it produces spectacular bright sparks when alpha particles are ionised between the electrically charged circular wire grid and steel electrode. It comes complete with sliding holder for an alpha radiation source, an accurate scale to measure the effects of distance between the source and the grid and is built in vacuum formed black plastic case. All of the electrical connections from an EHT power supply are through 4mm insulated sockets. Connections to Timer Scaler and Frequency Meter are via BNC to BNC cable. Requires 5kV EHT power supply and alpha radiation source. Weight: 400g. Dimensions: (L W H) 310 77 85mm.
