Radar System Engineering

SEC. 7.6] THE U.S. TACTICAL AIR COMMANDS 233
10 enemy planes downed. After this initial shakedown period, 90 enemy
planes were destroyed for a loss of 13 to the RAF, before enemy jamming
of the 1.5-m equipment used in this first work put an end to its usefulness.
The success of this experiment led the British to design a hlgherfrequency
radar specifically for the purpose of close control, and resulted
in the modification of the first of the .American 10-cm sets, on its arrival
in England, to fit it for similar close control. Because of the -African
experience the control setup was made mobile. Figure 7“11 shows the
Antenna
lpe reporting
& -> Telephone I/i/i
ll\+Tria@atio=
K&’
;me:nt
and briefing
FIG. 7.11.—Layout Ofradar control center.
arrangement of facilities arrived at for an installation designed for use in
close control.
The antenna is shown mounted on a low structural-steel tower. For
mobile operation the antenna is mounted on a trailer (see Fig. 9.15).
Power is supplied by diesel-electric units housed either in a Jamesway
shelter, as shown, or in trailers. The maintenance shelter contains, in
addition to workbenches, spares, and test equipment, the power control
unit for the set. Another shelter houses a number of B-scopes llsed for
reporting signals to the operations shelter, where they are plotted. The
coverage of each B-scope can be chosen to give the best total coverage of
the area important to the operations being carried on by the station.
Another shelter houses the telephone switchboards, a triangulation table