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What (who) is 630-meter band - definition
630-meter band
AMATEUR RADIO FREQUENCY BAND
600-meter band; 630-meter amateur radio band; 600-meter amateur band; 600-meter band (amateur radio); 630m band; 600-meter amateur radio band
The 630-meter (or 600-meter) amateur radio band is a frequency band allocated by the International Telecommunication Union (ITU) to amateur radio operators, and it ranges from 472–479 kHz, or equivalently 625.9–635.
20-meter band
AMATEUR RADIO FREQUENCY BAND
20 meters; 20 meter band; 20m; 20m band; 20 meter
The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.
exposure meter
![CdS]] [[photoresistor]], in opening at left.](https://commons.wikimedia.org/wiki/Special:FilePath/Autoexpmeter.JPG?width=200 "CdS]] [[photoresistor]], in opening at left.")
DEVICE FOR MEASURING LUMINOSITY
Exposure Meter; Posemeter; Light Meter; Luxmeter; Exposure meter; Lightmeter; Lux meter; CdS meter; Light metering; Light-metering
¦ noun Photography a light meter.
