Bird Model 4391 Wattmeter RF Power Analyst (Used)Earlier version of Bird 4391A, specifications are unchanged. Used in Good Condition, most have cosmetic flaws but are functionally AOK.
4391A Thruline RF Power Analyst 0.45 MHz to 2.5 GHz (elements sold separately). 1 W to 10 kW. Uses the same plug-in elements as the Model 43. PEP, Dual element, LED, Portable Wattmeter. Bright LED Display, Long-stroke keyboard and range switches. Built-In Power Supply and Charger
Martin RF Supply
Arlington, MA 02474