"K1TTT" wrote
...
On Oct 23, 7:20 am, "Szczepan Bialek" wrote:

I prefer Wiki:
"The voltmeter in the same radio reads 125 millivolts. Since watts (the
measure of how much power we have) is the voltage multiplied by the
amperes,
we have 0.000175 times 0.125, or 0.0000218 watts, or about 22 microwatts.
The station is putting out 50 killowatts, and we are receiving one ten
billionth of that power, yet we can hear it across the room."

Could you help? The simplest radio:
" Tape the other diode wire to a cold water faucet. This makes a good
connection to the ground, and is thus called a 'ground' connection.

Hold the remaining free bare wire of the earphone in your hand. This
makes your body into the antenna for the radio. Put the earphone in your
ear. If you are close to a strong AM radio station, you will be able to
hear
that station faintly in the earphone. You may hear more than one station
at
once. "

The diode has the two ends. Which one should be tapped to a cold water
faucet?
S*

well, of course, once you put a diode in the circuit you are forcing
flow in only one direction. but try this, turn the diode around so it
only allows electron flow FROM the ground... and you will still hear
the station.

With the same power?

so now how do electrons flowing from the remote antenna
through the air get to ground through your diode??

You forget about chassis. In the opposite setup the wire is the antenna and
your body is the chassis.

Are you rich enough to check the simplest radio?
Is the same power in the both arrangement?

S*