End section of marine hydrophone cable, electrical connectors, oil filler plug and transformer group End section of marine hydrophone cable
Hydrophone, P.D.H. MarkI, with Xylonite baffle, Y piece, first devised by William Henry Bragg and Ernst Rutherford. Hydrophone with Xylonite baffle
Hydrophone drifter set, complete, telephone headpiece, transformer & condenser Hydrophone drifter set 1916
Two crystal inserts (hyprophone units) for hydrophone streamer. 5x4 diam cm Two crystal inserts for hydrophone streamer