Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

124 FREQUENCY MODULATION, Volume IOne of the Radio Facilities engineering cars used by NBC for suchmeasurements is shown in Figure 12. Each of these cars is a passengersedan in which the body and interior has been modified to house a75B RCA 500-kc to 20-Mc field intensity measuring set, a 301A RCA18-Mc to 155-Mc field intensity measuring set, a modified RCA 302A± .«4«a,W2XWG FIELD INTENSITYMICROVOLTS PER METER100J WATTS 42^6 MCANTENNA HEIGHTS 30' - 1300'Fig. 11noise meter, 2 Esterline Angus recorders, a driveshaft-to-recordergear and clutch system, a special vernier speedometer and distancerecorder, an automobile receiver, an aviation type broadcast loop, au-h-f universally mounted antenna, a swivel-mounted searchlight, acompass and a steel mounting frame with aviation shock absorbersfor instruments. Quick-demountable mechanisms permit easy removalof measuring gear.