On Sat,3/19/2016 3:42 PM, Phil Kane wrote:
"Low voltage" meant that the insulators were less than a meter long.:)
It has a very different meaning in the wiring of buildings. Low voltage is less than 25V RMS or less than 25VDC, and has less stringent requirements for protection by being installed in raceways (conduit, cable tray, etc.) Most audio, video, RF, and control circuits in buildings carry low voltage. And that's why 24V is used for "low voltage lighting."
Our Chicago SBE chapter toured the Argonne National Accelerator Lab SW of Chicago about 15-20 years ago.When the engineering crew talked about the hundreds of power amplifiers running "a gallon" to referred to the hundreds of Megawatt power amplifiers that powered the accelerator. They told us the operating frequencies, and in the parking lot outside the building, you couldn't hear a peep from them!
73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
