MRP-4, codenamed Barbara, is a receiver for direction finding of radar stations, manufactured in the early 1970s by Tesla in Czechoslovakia. It is suitable for the reception of pulse transmissions in the 1 - 10 GHz frequency range, and was used during the Cold War for identifying and locating (mobile) radar stations. It can also be used for finding the location of the illumination beam of an externally energized covert listening device (radio bug). Also known as NSN 5840-16-001-1378....r>More information: cryptomuseum.com/df/mrp4/index.htm Weight: 15, 5kg / 34lbs (set) Made in: Czechoslovakia Condition: Used.