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SWR meter, inline, non-resistive, led
I am looking to construct a SWR meter which can be left in line and consumes
negligible power (just to light a led or two and associated, minimal, losses of transmitter power.) I had seen such a schematic years ago. Drawing a mental picture, from what I can remember, a wire ran down the center of a tube on a couple of insulating spacers (washers) in a concentric configuration. A small hole in each end of the tubing allowed an insulated pickup turn to be run adjacent to the wire in the tube--exiting the holes in the sides of the tubing, this picked up sufficient reflected power to drive the led(s) and give an indication of SWR (led(s) dim or out at 1:1, or near. Anyone got that schematic/construction details or, one of a similar unit to construct? This unit was inserted in the coax line to the antenna. Warmest regards, thanks in advance -- Hay, if'n ya'll cun't konstructivly partecipete in this har disscusion, haw aboot speel-checkin it fer me? |
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