Użytkownik "Gordon" napisał w wiadomości
.. .
Szczepan Białek wrote in
:
He http://scitoys.com/scitoys/scitoys/r...ade_radio.html
is wrote: "If you don't have a strong station nearby, you can add a
battery
in series with the LED (a small 1.5 volt battery works fine). The LED
will light up, and the radio will play much louder than without the
battery (if the LED doesn't light up, try connecting the battery the
other way around). This arrangement is the best detector I have used
so far, and is louder than the 1N34A germanium diode"
Can anybody check the direction of electrons flow?
Of course between the antenna and the ground.
S*
Putting a battery into a crystal radio is a trick I have
known abot for a while. Usually a 1.5 volt battery in series
with a 1 meg resistor is attached across the detector.
This is usually done with crystal sets made from 1n34 diodes.
The concern is that weak stations can't be received because
they can't overcome the junction voltage of the diode.
The battery provides a DC bias for the diode and increases
the sensitivity of the receiver by biasing the diode junction.
The electrons flow in the direction that a forward biased
diode allows them to flow.
Does it means that there is a net flow of electrons "between the antenna and
the ground".
In which direction?
S*