Quote:
Originally Posted by Graham M
Amateur Radioists
|
Radio Amatuers if you don't mind
including Kymmy and myself.
The RSGB(Radio Society of Great Britain) are trying to raise the funds to force a judical review on the legality of these devices. They work as a radio transmitter, but instead of feeding their output into an aerial, they use your mains wiring as a balanced line transmission line, the same as your phone wiring minus the twists. The balance, meaning equal spacing, length and termination impedance of the tranmisson line helps to keep wanted signals in, and unwanted signals out.
This falls down when talking about electrical wiring, as there as never been a greater mis-noma, imbalances, no termination, changing impedance due to thing being plugged in, switched off/on. The result is signals being transmitted from your electrical wiring, it's not
like transmitter directly plugged into an antenna, it
is one.
Now some homeplugs are "notched" meaning they don't use the frequencies of certain users, however some are not.
The problem, at least from my point of view, is that they are unlicensed radio tranmitters, and should be dealt with in the same way as pirate radio stations, in addition to this, the type approval that they were tested to/against was a dodgy German standard that highly debatable.