>> Used correctly, THAT symbol is specifically Earth ground. As opposed >> to the 'sideways E' (chassis ground) or triangle (signal) ground >> symbols. > >REPLY: > >Just wait till you go to work in the aircraft industry and try to >"ground" something at 30,000 feet! :-) > >73, Bill W6WRT
Taking this one step further, it can be very useful to ask yourself: "How would this circuit work if it were completely floating in space?" This is a very good way to focus on CONNECTIONS, and on the fact that currents flow in closed loops (which is precisely why we use that word "circuit"). Imagining the circuit in free space will show that the so-called "ground" connection is usually a return path being shared by several different signal and supply circuits. It will also show that a connection to "earth" is often not needed - or worse still, may be a complete illusion. It IS important to use the right words, because RF engineering is NOT an easy subject! Smart people will help themselves to think straight by carefully using the right words. Anyone who says "Hey, look - I'm getting this right, even when I'm using the wrong words!" is probably about to demonstrate that he wasn't smart <enough>. 73 from Ian GM3SEK ______________________________________________________________ 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]
