Have a look at http://www.qsl.net/iw3hev/ where a simple
non resistive broadband coupler (used in an antenna analyzer)
is described.

Andreas



John Smith wrote:
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