fluttar was an inexpensive system compared to the main dew radars. it used a 1 kilowatt, continuous wave, klystron amplifier as a source, and as this was not pulsed, much simpler high-voltage circuitry was needed. it could operate anywhere from 475 to 525 mhz. towers were separated anywhere from and were tall, depending on the local terrain. the main dew stations were normally about apart, so typically the an/fpt-4 transmitter was placed in the middle, with the an/fpr-2 receivers at the stations on either side.