This is a DIY crystal radio
they were very popular in the nineteen twenties they require no external power
to operate no batteries no power nothing
they operate strictly on the radio waves that are coming in
so if you're looking for an emergency radio
where when the power's out, or you don't have batteries or whatever this is the thing
to have
this is made primarily from scraps, in fact you can get
almost all these pieces by pulling other stuff apart
and there's only 3 major components
There's this coil, which you make yourself, there's this crystal diode which is kind of
the miracle that makes this work and it comes Radio Shack it is very cheap
and another little resistor which you can pull out of something else or buy it from an electronic store
for almost nothing. There's a piece of plastic tube or you can also use
a hard cardboard tube
some wire you can get out of an old transformer. I happened to buy this
Spring clips, you don't really need the spring clips, a lot of people use the
brass screws and washers to hold the wire down. Give you some connection points.
There's this, which is the tuner.
It is nothing more than a stainless steel
big size bicycle spoke that's been shaped into what is needed
There's a wood bead on top to hold on to
Going over this way again, the diode again and the resistor and then it
goes back to the coil and as you can see that's it.
There's no other component
It's great for those times when you need a radio, you don't have batteries
You don't have power
and also they're fun to play. Let me show you how to build it.
It's a weekend project, very simple so let's get started
2 of the main pieces. A piece of wood.
Which is...
21 by 17.5 cms
If I remember right. I'm using a 2.25 inch, specs call for 2.5 inch, but 2.25 should work.
2.25 will work. It's thin wall PVC.
7 inches long or
17.5 centimeters
The piece of tubing we looked at earlier. And what I am going to do is wind this
with wire and we just need enameled wire
and you can get it, from for example, an old transformer. You use the heavier
windings not the lighter ones. This is from an old ballast
From a fluorescent light
I unwound the ballast. What I am going to use is
it's a heavy enameled wire I bought, I think
I got from Radio Shack or someplace like that. On to the next step.
I'm going to show you how to wind this coil using a small one.
because the big on is too hard to keep on camera, it keeps going out of frame
It works the same as for a big coil.
I just cut off a small piece. You need a hole
on each end of tube
and then you're going to start your wire in 1 hole
and you are going to wrap it nicely until you reach the other hole and it will go through there
and then you will bend it over sharply to hold it, you can put tape to help hold it.
Let's get to the wire
One of the tricks:your wire needs to be smooth and unkinked
See this first part? It's not smooth.
So we will put that inside the tube.
You want to make sure your wire is smooth and unkinked
Notice I'm using the toilet tissue holder to hold the wire?
You do not want the wire to come off the ends
all squiggly and spirally.
You don't want the wire to kink. This is the most difficult part
it's not really that hard, but it does take 2 hands
which is the reason I am using this.
You want to get yourself a pretty good length of wire in here. 6 inches or so
Bend over sharply in there, like that
and then you want
for wrapping it likely and it doesn't matter which way you go
and her turn is very important because
yet is a however they'll
gonna all
cricket all the others will be crooked you might be tight
and straight you see that
yeah no good to push them together
gin
pushed together no wonder
that hellhole together you pull it away
long here my dude love that man who demonstration electing card
be but pulled away who on here spread out you go along it'll help
stick to the coral you not want any came
you don't want any other problems include
you'll get you get little ball glue underneath the wire
and and then it will not lay out nicely
and keep the wire hi you love you quell
very I a
beautiful
a when doing them pushing it this way
and I'm turning at the same time lay in the pool
a.m. to get the keep the Tigers on their
in the glue helps
they may have with a coworker radio and the answer is yes it would
it would not pick up very much would have a very limited range are frequented
the longer the quayle the greater the rain to frequent the
but it also
is harder to tune because your tuner ought to get longer and longer nor
sweep across russia when I mean
okay
cause gonna continue to a camera and
that also you a we conclude how we finished the hell
here getting toward the end
where did have a few keep that was some pushing out ever
that were going on here here's our whole
before five more turned around here
keeping
hey yet there's a clean break their
I'll absolutely make sure there's no king
beauty count in this don't let go of it because that's where we'll come spring
of
here when the start over okay we'll call it good here
okay here's the last hole hold it
hole that play you need help please
bear cut it off the whole wheat roll right here
protected where the anti their again we don't like a good
yeah a little bit of you'll agree with bill public eye
know what to say don't break it politically
K and I'm going to be in that
sharply in five years welcome lose again today
or whatever we will but there's a coil
not too bad in court again
your oil will be pics 60 inches long
a call i made it has helped me when you have heard
the wedding which is ridiculous somewhere we do in 1820 is
pretty typical but anyway that
that how you do it and what we'll do is we'll mail
be that would be %uh the coil to and
the the the hardest part to begin new this a a threat to the radio at the Brit
Oval
in a bit the other endeavor
they live close to home and I used the
glue I go clean the glove and I was bred with
the and clearer acrylic and then the quill
be done
mostly these radio there's a disgruntled
from here to bottom BP and the puppy walkers in here
be good because you do not want to quell the touch baby a me that the old block
and as you can you crude but I I saw him to the block in the blue
a roughly the same with two and I chuckled out my you the rap
and it happened on the bottom with a couples crude
an accord happened right here with one group
they on the other side
bring
and miracle run
with I for the here
in couple here for the diode
in a couple here for the intended ground
and then we could only find wiper triggers you're here
you can be on it and all we've done is
run the wire beer and I thought are you don't have to bother but later on the
clip
and they'll go here so but it grew in there you can be there
did the with the wire around here and thought it on their
soldering that you don't have to do it but if you can help a little bit
a note that the the enamel pins great of the wire
that one of the trickiest part gotta get that brown calling here
of their into your night shiny copper to be the color like that
you feel a little bit right there in my finger
you get to a mammal of their per on their solder
if you're going to use a brass washer and
that these clips that's OK too just look the other way around 10 the
the water brass washers and daughter on their
and you cannot use Dana I mean the you can you think that you're not gonna
are but then looking daughter don't get a law so I recommend breath for that
reason
but you do the same thing but the wire loop around here
so hard on their nanny but the speaker there it'll make good contact
a brat equipment thing with this group and over here on the
by got the to breath clip let's talk about the
the two clubs right here the for your phone
and help our part to the be well the answer is
to the little bit farther apart than your re the truth
wreaths to rate your the 10 the ohm resistor
and need to go in there and equip
if you're using walkers and grew the end it but didn't need to be in there that
you can comfortably
wrapped the a.m. to the a around
so if you're using screws and washers you may want to bring the little bit
closer to the open space to rapper
rather be in around there and that they were the diode
exactly the same issue with the diode a make sure the event that didn't in there
that you can come fully connected if you think bring clips
wanna be the little bit every girl little bit longer
I'll you want the wires a little bit out by the clip
and if you're using screws and washers
you want to bring the middle but little bit closer so you can wrap the wire
around the
the the grew in the water that up to hole in their firmly
you don't have to you those brinkley than showing them
another technique a lot of people you did this grew into bro watchers
and what you'll do the run though wire that you want to connect
around the wrap around between the two water them when you tighten it down
little pinch it will play have been there a it a little less convenient
than the clips but doesn't work very well
the original map the up tightening inner
making connection
now in between
the wiring that goes from here
the wiper and then over to the first clip on the
diode which would be here the only
a pretty poor the wiring is it will look like the
and I got Brett Walker
and that peter weir who where do we go from here
to their gonna go the screw them right here
for the wiper was gonna look like a and
the wipers gonna go on to hear like to
a what I did to make this a
took a piece of copper wire and you can see the relatively simple
I'm a deliberate and daughter again you don't have to sorry the rabbit but
I prefer solder I Potter to this wire
the to the breath washer order to wear the bra water
and then again I made a little over here trying different types that looked
he was one would work and that'll be the connection from here
here into the wiper and we talked briefly about the wiper
who may use the collected station where a in the
a the label they look deal a heavy duty by people spoke
and the heated up and put a loop in that and the
but screw through the whole down right here in the hall
and when the screw them play to push their own here
and like temperature
and then that use or letting the station
on the other end it that the mob up a bit though where a little bit late but
I'm on there
%uh L the knob did to for your fingers because he touched the wire we are to me
it seems the tuning
so a collared shirt anomaly in the okay
so that the wiper but got the blue swim play here
and we go to put on the wiper
you to water down here which is the one contacting that wire
they open the another water on up this group
so that when you turn that that movie night between the waters
up the water the logjam in and
try to unscrew the screw up on who are going to do is return taken
put this here like to but they've been here
and then the screws in the border and you that protecting the tension
on the
on the wiper appear at that how the white britain at all
well very much yet a.m. we've gotten
we got the wire coming out to play the coil come down here
it indicated are on the quip a Realtor will go across here and then the year
phone will be connected to hear the two orders
the tube which is good together you're using the washers you didn't have a
screw in a few waterline
to make the connection diode will go here
then there's the wire here to the the white bread we showed earlier
wire goes over here too
contact which will be the ground wilbur ground wire here
back here the antenna wire quibble go to our antenna
and then of course we should earlier goes into the coil
so that pretty much yet a yeah
the the that the to
assembled he's all sure you're competing pieces we need to do to remove the
enamel off with wire
to the wiper conducted it the radio not gonna work
it probably because the animal had not been removed from here or from one of
the two nd who
that more common air giving them a lot there could be a little tricky I'll show
you that here
and then we'll pass it then we can look at to remove the
the man we gotta get the name a law here because that may be a good electrical
contact to the coil
to get the enamel of a bearded you wanna stripe across
here with the a
gone but I did it later out with other people
them paper and I put around my way for like the make the
here and what will happen it will mark you
scratching the copper copper wire a
and then what you wanna do is once you've got a good mark on where gonna
touch
takers and paper and stand up and down
that direction you can hear
shining at my place and work on that until the
until you got a nice clean copper strip across here
then take a brush toothbrush regular something like that people
tissue and get the copper enamel that other you don't get the copper that
though they really short between the coil
you will get a very good very good the separation that is clean it out with the
brush
and early that when it comes to
these connections here that is great the
to copper early and now of the copper
I use combination a short night like this
and damn paper I don't you lot of people will burn it off I don't like to do that
soften the copper so
to use them a short my great in them a lot get all the enamel off
can make sure shining all the way around the wire
before you make your connection altogether medically important part
pritchard I are here a.m. don't forget that doesn't matter which way to go
usually at worry about with %uh the cake not
you read that you're here resistor has no direction either
and then the last thing is the we've been here
could be here P and again that matter this
one where on one time where the other but elect in Rockwood whitewater
color but at their ready to you
the than you
an airport over here on the by connect that were here got a ground
to the connector the ground from here too the air conditioner
a the antenna hard steel wire
who the pier I'm the go
the the inflator and then all the way out there
that other ban and on the other painted connected by
again a a people drink to keep it from touching the metal
just be careful not to run at near
electrical lines denote we have got no electrical wires growing out there you
gonna run across electrical I requires anywhere near electrical wires
and make sure your ground has nothing to do with electric the it we're going to
the big like a water by Britt humping
and for operation that pretty much it the
the with them and turn the that really work
where you have a little the
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