Radio shack Power/VSWR Meter

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This power meter allows you to tune your Ham or other amateur radio system to perform at its best. Its standing wave ratio (SWR) function helps you trim your antenna to the precise length that produces the maximum transmit power. Use it's power meter function to measure your radio's peak envelope power (PEP) or average power. Displays SWR measurements to help you get maximum power from your radio Measures your radio's peak envelope power (PEP) or average power. Three power ranges: 20W, 200W and 2,000W 3-30 MHz operation frequency range Analog meter display