Yep I use that configuration for a directional coupler/VSWR measuring
device some years ago. I ran the internal insulated lines up either side
of the coax (RG213) into a switch box and off to a DVM. I think I used
shottkey diodes.

Cheers Bob VK2YQA

Cecil Moore wrote:
I vaguely remember building a coaxial "slotted" line without
the slot when I was in college. We took a piece of coax,
stripped off about a foot or so of outside insulation, and
ran an insulated wire under the braid. We tied one end to
ground through a R=Z0 resistor and ran the other end
to a 1N34 rectifier. Anybody remember running a wire
under the braid to achieve an inductive pickup for
forward and reflected power?

Bob:

My diodes are schottky...
My "key" has always been shot....
sorry, couldn't resist... no one make more typos then me... grin

Warmest regards,
John

"Bob Bob" wrote in message
...
| Yep I use that configuration for a directional coupler/VSWR measuring
| device some years ago. I ran the internal insulated lines up either side
| of the coax (RG213) into a switch box and off to a DVM. I think I used
| shottkey diodes.
|
| Cheers Bob VK2YQA
|
| Cecil Moore wrote:
| I vaguely remember building a coaxial "slotted" line without
| the slot when I was in college. We took a piece of coax,
| stripped off about a foot or so of outside insulation, and
| ran an insulated wire under the braid. We tied one end to
| ground through a R=Z0 resistor and ran the other end
| to a 1N34 rectifier. Anybody remember running a wire
| under the braid to achieve an inductive pickup for
| forward and reflected power?