[AMRadio] Station Grounding


Robert Nickels W9RAN at oneradio.net
Mon Nov 5 17:22:25 EST 2007


Bob Macklin wrote:
> In addition to that, 90% of the new electronics seems to have a micro
> computer in it. Every one of these things generates RFI!
>   
Yep, and some of them aren't convenient to turn off, such as your 
thermostat or telephone.  And, now that manufacturers are all concerned 
about being Green and minimizing standby power, most consumer products 
are going to switching power supplies that are "unintentional 
radiators".  Whenever you see a device waiting for you to hit a button 
on a remote control, or just a soft-touch on/off switch that you know 
isn't capable of controlling the AC power directly, there's probably a 
microcontroller inside, powered by a circuit that puts out as much RF as 
it can while still meeting FCC restrictions.

The "big switch" is a pretty good idea!

73, Bob W9RAN


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