During World War II, GIs in the field built really amazing simple radios to listen too. These were made with materials that they could get their hands on and were small enough to carry around in a big pocket. You can modify this design if you want to set it up so that it’s tuneable too! To see all the plans, go to makezine dot com slash podcast!
Duration : 0:3:49
[youtube skKmwT0EccE]
December 11th, 2009 at 4:47 am
awesome
awesome
December 11th, 2009 at 4:47 am
lol… this …
lol… this combined with the home made speaker… just need a home made tv and i’m all set lol
December 11th, 2009 at 4:47 am
yea right at the …
yea right at the same time he puts the fire on the fire engines siren goes off.LOL
December 11th, 2009 at 4:47 am
i dont know…i …
i dont know…i think you must use at least a transistor(or two) or op-amp or some amp IC(TDA…)
December 11th, 2009 at 4:47 am
The problem with …
The problem with this kind of radio is that you cannot tune the radio. That is, the station you will hear is the one that has the most power.
You’d need some kind of active element to amplify the signal. Sorry, there’s no easy way to do that.
That said, try listening at night, since this is when the ionosphere is the most reflective for radio signals, and you can get a signal from very far away!
December 11th, 2009 at 4:47 am
can you ampfly the …
can you ampfly the audio with a battery?
December 11th, 2009 at 4:47 am
lol. At 2:32 you …
lol. At 2:32 you can hear sirens in the background
December 11th, 2009 at 4:47 am
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December 11th, 2009 at 4:47 am
BULLSHIT!!!!!!!!!!!
BULLSHIT!!!!!!!!!!!
December 11th, 2009 at 4:47 am
How long would that …
How long would that 120 times around the coil translate to?
December 11th, 2009 at 4:47 am
@anorwood84 tyvm! …
@anorwood84 tyvm! very well explained!
December 11th, 2009 at 4:47 am
Like AC voltage, …
Like AC voltage, Radio waves are alternating as well… As with any alternating current, they travel to areas of smaller potential. So for example, Radio Waves being picked up by the antenna have a higher potential than ground. So the current travels from the antenna through the coil, catwhisker, through the earpiece, then to the ground.
December 11th, 2009 at 4:47 am
i got so lucky i …
i got so lucky i listned to 103.5 and in a walk in a park i listened to 101.1 they have realy good songs
December 11th, 2009 at 4:47 am
Yes the number of …
Yes the number of coils will affect the tuning frequency.
Using a ground maximizes the potential difference between the radio wave and ground. In other words it makes the signal bigger.
December 11th, 2009 at 4:47 am
Does anyone know if …
Does anyone know if the amount of coils change the radio station you pick up or the quality or anything at all?
December 11th, 2009 at 4:47 am
why do I need a …
why do I need a ground?
December 11th, 2009 at 4:47 am
simple things that …
simple things that make you think and use your brain cells… what can you modify to receive shortwave broadcasts? thanks!
December 11th, 2009 at 4:47 am
make me one
make me one
December 11th, 2009 at 4:47 am
HEY does the gounge …
HEY does the gounge of the coil matters ???
December 11th, 2009 at 4:47 am
wtf where do i get …
wtf where do i get a cat whisker?
December 11th, 2009 at 4:47 am
where is the pdf ur …
where is the pdf ur talking about?
December 11th, 2009 at 4:47 am
This is cool.
This is cool.
December 11th, 2009 at 4:47 am
am
lalalala
am
lalalala
December 11th, 2009 at 4:47 am
NICE!!! Gona make …
NICE!!! Gona make it someday…
December 11th, 2009 at 4:47 am
hey… is fm or am
hey… is fm or am