Dresser Industries I know--good customer.
SCADA, I have worked with for 40+ years, although we usually supplied our
own RF/microwave interconnectivity. Used to be a good use for the 900 meg
band before all this cell nonsense. I guess that applies to 2 GHz for the
past ten years also.
Low frequency carrier current is familiar to me, the office next door to
mine in Lynchburg in 1960 is where GE designed their carrier current
signalling equipment.

So, where are these "repeaters" you blithely cited the existence of? Power
line carrier is regularly discussed in Transmission and Distribution News as
well as other electric utility magazines, and I do not recall seeing any
reference to any equipment outside substations associated with carrier
current signaling. I submit that the isolation inductors alone qualify the
location as a substation anyway, nevermind the ceramic posts they call
coupling capacitors.

--
Crazy George
Remove NO and SPAM from return address
"W5DXP" wrote in message
...
Crazy George wrote:
Manufacturer and model #?
Or location of one in South Texas?
Or URL for manufacturer of one?
Outside a sub-station, of course, which will be the requirement for BPL
repeaters, which will also have to be bi-directional.

When I worked for Dresser Industries in Houston in the 60's, some
of our SCADA systems sold to power companies operated over power
line carrier systems. As I remember, it operated on RF frequencies
below the AM broadcast band.

A web search for "Power Line Carrier" turned up 650,002 entries
including some for high speed internet access.
--
73, Cecil http://www.qsl.net/w5dxp



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