A MULTIPLE UNIT STEERABLE ANTENNA 



371 



Fig. 24 — Pictures of the angle monitoring oscilloscope and the delay indicator 

 tube. In films 1 and 2 the indicated angles are 15 and 22 degrees. The MUSA 

 branches were set at these angles (</)a = 240°, 0b = 340°) and a delay of 400 micro- 

 seconds was used. The time was 3:20 p.m., E.S.T. Films 3 and 4 were taken at 3:15 

 when a third wave of 26 degrees was present. One branch was steered at this wave 

 (<^B = 50°); the other at 16 degrees {<t>A = 250°). A delay of 1000 microseconds 

 was required. GSB (9510 kilocycles) Daventry, March 10, 1936. 



