Telephone lines test position, used by telephone lineman.
Used by the US military during WW2, designated EE-65-E.
Used by the IDF for field and fixed installations during the War of Independence (1948), the Sinai Campaign (1956) and the Six Day War (1967).
Used for local battery and common battery circuits, testing continuity, shorts, ground, capacity, distance to open, line crosses and ringing.
Using external 48 Volts DC supply and two BU-30 batteries (1,5 Volts).
