Description
Up For Buy It Now (1) HEATHKIT SWR / WATTMETER 1.8 TO 30 MHZ 2000 WATTS HM-2140 WITH POWER SUPPLY Looking at the third picture, you change from AC power supply to battery, by switching plugs. The HM-2140 has been calibrated with a Bird Watt meter. Looking at the video, the HM-2140 compares to my TS-590S at 100 watts output. "Thanks For Looking"