Note
Ham Radio, Jul 1974, p. 65.
Ham Radio, Sep 1975, p. 105.
Can be left in the line for continuous monitoring and does not require calibration with varying power levels. The taut-band meter movement provides ±3% accuracy over four power ranges: 0-10, 0-50, 0-100 and 0-500 watts.
Bandwidth, defined as the frequency range over which ±3 dB accuracy is maintained, is ±15 percent of center frequency. Any center frequency can be specified from 30 MHz to 470 MHz.