um e 489 eins Project 16,3 = Electromamnetic “earirements - R, FE, rartridge <> ror a the electroms netic recording system was directed crimerily at measuring alpha. Sufficient coverage was provided to record seven jener- ations on two Kosei soopes, each backed up by a linear soope, Sufficient gain was provided to deflect the most sensitive scopes one-half acale witt a ficld strength of one millivclt per meter. A relatively narrow-band antenna vas used, centered at 75 M.°. A high radio moise background required reducing the gain by a factor of four just before the ahot to prevent continous triggering. The exponential form of the signal was masked by sevare interference, predominantly mesr SC M,C, This probably was tre Lookout Mountain voice countdown transmitter on 49.5 M.S, The time interval system was operated as a dry run for two-stage devices, All scopes functioned correctly.