Abstract: A rigid bridle for supporting a current emitting logging tool in a sonde is set forth. The rigid bridle is formed of multiple segments of tubular members, normally formed of metal. At selected locations along the length thereof, they are interrupted by electrical insulators which prevent current flow along the length thereof. Moreover, the external surface is coated with first one and then the second layer of insulative material; three such units in serial assembly support a return current electrode for use in a current emitting logging tool. In an alternate form, a short electrical isolator joint is set forth which includes concentric metal members which are spaced from one another when assembled by insulative members positioned therebetween so that current flow along the length thereof is prevented.