Journal of the Society of Motion Picture Engineers (1930-1949)

Sept., 1940] TELEVISION PICK-UP OF PASADENA PARADE 225 the 2-inch-spaced feeders a distance of 71/* inches at the point where they fastened to the antenna. With this antenna "grounded" at the center to the hayrake reflector the latter was "hot" with current. The transmission results were inferior to the original arrangement. The final arrangement consisted of the above half-wave antenna, delta-fed but insulated from the hayrake reflector. This arrangement gave signals of slightly greater strength than the original folded dipole, an absence of standing waves on the feeders, and satisfactory loading conditions on the transmitter. FIG. 5(a). Video equipment inside Elks' Club. Two camera monitors and master control monitor on top row; synchronizing equipment on bottom row. (Camera and auxiliary unit in foreground.) Rotating the transmitting antenna indicated that it was not emitting a sharply directional beam. Departure of 30 degrees either side of the line of sight to the receiver had little effect upon the received signal strength. Subsequent tests proved that being off line of sight contributed to this behavior. In contrast, the double V receiving antenna gave a sharp maximum signal within =»= 5 degrees of the line of sight. The first step toward improving the signal-to-noise ratio was the erection of a 15-wavelength V antenna. The central angle was 25 degrees. The extremity of each wire of the V, which was approximately 45 feet long, was terminated in a two-turn 1/ 2-inch diameter coil, a 400-ohm non-inductive resistor, and half -wave rod 18 inches long mounted vertically. Victron insulation was used for feeder