4521, Single Meter - Single Element Panel Mount RF Wattmeter
4521, Panel-Mount RF Wattmeter
The 4521 is a single element socket and single meter unit. It's designed for power measurement in CW and FM systems that employ 50-Ohm cable or 7/8" EIA transmission lines. The 4251 includes a precision line section and the one 3-scale analog meter which give full-scale direct readings from 100 mW to 10 kW.
The rack panel fits standard 19-inch equipment racks and uses the same elements as the Bird Model 43 wattmeter which are sold separately. Depending on the element selected. Forward and reflected power are measured by rotating the element.