We have them here also (West Cornwall). Many years ago, say in the
early 1960's, the street lights here were switched on from a control
centre in Redruth. A pulsing audio-frequency signal was sent through
the mains supply (about 1 pulse per second IIRC), which set a sort of
balance-wheel arrangement oscillating in the control box in the
lamp-post, until the amplitude got large enough to close a contact,
switching on an individual light or short sections of lights. The
slight variation in characteristics of the oscillating switch meant
that the lights didn't all come on together, but over a period of a
few seconds, so reducing the sudden drain on the mains supply, AIUI. I
used to have a Cossor CR100 communications receiver*, and obviously
something in the power supply wasn't very well screened, as I could
always hear when the street lights were being switched on. There was a
greatly enlarged model of this oscillating switch on display in the
Science Museum, which worked when you pressed one of the buttons that
were on every display case.
On Friday 13 December 2013 09:35 Huge wrote in uk.d-i-y:
And if "they" cannot apply solid network security to pumping stations and
the like, I very much doubt if anyone has bothered much about some street
One of the reasons I do not want a smartmeter for electricity...
Tim Watts Personal Blog: http://squiddy.blog.dionic.net/
http://www.sensorly.com/ Crowd mapping of 2G/3G/4G mobile signal coverage
Correction, I'm someone who has opinions that differ from most of the group.
Oh. Well I don't have one so I wouldn't know. Funny thing is it's only a few years old as I went onto a double tariff so needed it changing. Must have been just before smart meters came out, or are not all energy companies using them? They give me a discount to read it myself.
I guess what you need to do is to stop the meter sending a signal and put your own signal in to tell them you've used a smaller amount.
Dancing cheektocheek is really a form of floor play.
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