Ground as used for an antenna system means an actual connection to the earth, usually by means of a metal rod, or in some cases a metal water pipe.

And then there is ground as in the ac power system. Ground here means ground. Earth ground. The power connection uses three wires. Hot, neutral, and ground or safety ground. The hot lead is always above ground, in the case of residential power, by 120 volts ac. The neutral is connected to ground at the entrance panel. And the safety ground is also connected to ground at the entrance panel. The neutral and safety are never connected together except at the panel and there no current in the safety wire unless there is leakage or a short. Its purpose is to conduct leakage to ground instead of through someone's body.

One side of the ac line being at ground is the reason for using an isolation transformer when working on sets that don't have a power transformer. Depending on how the set is plugged in, there can be 120 volts ac between the set's common and anything connected to earth ground, such as a sink, water pipe, or major appliance cabinet. The isolation transformer breaks the direct connection between the radio and the ac line.

:Thanks ....this helps clear the brain block. I couldn't get through my head how the grounding of components on the floating ground line achieved actual ground.....dah.....but they pass through cap and resistor to chassis. ----Danger, beginner at work!
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:::Floating ground is what's also known as the B- buss line.
:::It is not the chassis ground.
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:::IPAddress: ***.81.29.81
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::To keep things a little safer, instead of connecting one side of the power line directly to the chassis of the radio, they connect it to a "floating ground" that is seperated from "chassis ground" by a resistor and a capacitor, to make the radio a litle bit safer, with minimum loss of performance.
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::Lewis
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::IPAddress: ***.218.22.97
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:IPAddress: ***.101.203.151

IPAddress: ***.238.23.100