In March 1937, the LEMO started an internally funded project to develop a pulsed, electromagnetic, gun-aiming system. Slutskin was responsible for the overall project under the code name Zenit, the name of a popular football team at that time. Development of the pulsed, L-band transmitter was under Usikov, and Braude designed a superheterodyne receiver using a low-power magnetron as the local oscillator. This system, with transmitting and receiving antennas separated by about 50 m, was first tested in October 1938, detecting an aircraft at 3 km in its first version.