Bird 4391M Dual Element Wattmeter, RF Power Analyst, SN 1929

Model: 4391M. Make: Bird. Tested Good. 2 Empty Slug Loads. 200-500 MHz, 100W (82041) Not CAL'd . 200-500 MHz, 500W (1929-6) [500D]. 200-500 MHz, 50W (1929-5) [50D]. 50-125 MHz, 25W (1929-4) [25B].

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