page_title: Bird Technologies
section_title: Model 43 Thruline Directional Wattmeter
hierarchical_section_title: Bird Technologies / Model 43 Thruline Directional Wattmeter
caption_attribution_description: English: Bird Model 43 RF Wattmeter
context_page_description: Bird provides radio frequency communication products, services, calibration and training for the public security, cellular networks, broadcasting, semiconductor, military, government and medical industries.
  Bird's product portfolio includes spectrum analyzers, antenna and cable testers, power sensors, power meters and monitors, wattmeters, attenuators, terminations and loads, cellular repeaters, signal boosters, distributed antenna systems, RF streaming solutions, RF signal generation, and RF software analysis tools. The company's core market segments are Coverage Enhancement, Off Air Testing, M2M Sensors and Test & Measurement.
context_section_description: The Bird Model 43 Thruline Wattmeter was created in the early 1950s. The self-contained instrument used microwatts of energy from the transmission it measured. Its reference line section made it economical and provided built-in reference accuracy that remained consistent with age. The patent was granted for the Directional Wattmeter in 1958.
caption: Bird Model 43 RF Wattmeter
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