Notice there's no ground connection. And the antenna is in here.

請注意，沒有地線連接。而天線就在這裡。

As you can see there's not a lot to it. There's a crystal earpiece for listening

正如你所看到的那樣，並沒有很多東西。有一個水晶聽筒，用於聆聽。

to.

到：

Here's the adjustable capacitor for tuning in a radio station.

這就是調入電臺的可調電容。

Here's a diode.

這是一個二極管。

And this is the coil that the capacitor resonates with.

而這就是電容諧振的線圈。

But the trick is that this coil also acts as the antenna.

但訣竅是，這個線圈還可以作為天線。

This type of antenna is called a loop antenna, for reasons you can probably guess.

這種類型的天線被稱為環形天線，原因你大概能猜到。

Here's how I made it. I started with an extra large pizza box.

這裡'是我怎麼做的。我先用一個特大的披薩盒。

I could have just wrapped the coil around the outside of the box but I wanted it

我本可以把線圈繞在盒子外面，但我想讓它... ...

protected. So I put it on the inside. That meant the coil needed some internal structure inside

受保護的。所以我把它放在了裡面。這意味著線圈需要一些內部結構

the box. I decided to use the corners of the box's cover for that.

的盒子。我決定用盒子'蓋的邊角來做。

Start by making the corners of the box's lid like this.

先把盒子'的蓋子四角做成這樣。

The actual dimensions don't matter much, except that this length here needs to be

實際尺寸並不太重要，只是這裡的這個長度需要是

about one inch longer than the box is deep.

比盒子的深度長一寸左右。

Then cut the corners off the lid.

然後把蓋子的邊角剪掉。

You should now have two pieces from the front and two pieces still attached at the

現在，你應該有兩片從前面和兩片仍然連接在前面的

back.

後面的。

Next we need to make slots for this piece to go through the box.

接下來，我們需要為這一塊做槽，讓它穿過盒子。

First use one of the pieces to mark the where the slot should you go for all four corners.

首先用其中一塊標記出四個角的槽應該去哪裡。

Then cut them.

那就把它們切開。

And then tape the pieces in place.

然後用膠帶把這些片子貼好。

And there's the finish box.

還有'的完成箱。

Next we need to make the tuning capacitor.

接下來我們需要製作調諧電容。

We need two pieces of aluminum foil cut six inches by six inches each.

我們需要兩片鋁箔，每片6英寸，每片6英寸。

A piece of paper cut seven inches by nine inches.

一張7英寸乘9英寸的紙。

A paper towel roll.

一卷紙巾。

And some tape. It doesn't matter what kind.

還有一些膠帶。不管是哪種。

Tape one of the pieces of aluminum foil to the paper towel roll near one end.

將其中一塊鋁箔貼在紙巾卷靠近一端的地方。

Tape the other piece of aluminum foil

粘貼另一塊鋁箔

on one end of the piece of paper.

在紙片的一端。

Next, take the paper with the aluminum foil and wrap it around the tube.

接著，拿帶鋁箔的紙包住管子。

Wrap it around tightly,

緊緊地包住它。

but not so tightly that you can't slide it back and forth.

但不要太緊，以至於你不能來回滑動。

Next, I'm going to make electrical contact with the aluminum foil for each of these pieces.

接下來，我'要為每一塊鋁箔做電接觸。

To do that I've got this wire, and I'll strip it bare for a long length.

為了做到這一點，我'了這根線，我'會把它裸露出來長長的。

And then

然後

wrap it around like this

繞來繞去

and twist it on.

並把它扭上。

And there we go. That's contact with one end.

就這樣，我們走了。這就是與一端的接觸。

Now repeat the same thing for this end right here.

現在在這裡重複同樣的事情。

And there we go. Two wires now attached

我們走吧兩根電線現在連接起來

to the variable capacitor.

到可變電容器。

Finally, I cut a tab out of the top of the box for putting the capacitor on

最後，我在盒子的頂部剪掉了一個標籤，用於放電容器

when in use.

在使用時。

Next is to make the loop antenna coil. I'm using twenty six gauge (AWG) wire and doing

接下來就是製作環形天線線圈。我'使用二十六號（AWG）電線，並做了

fourteen turns.

十四轉。

Twenty two gauge, eighteen gauge and so on will also work. Just make sure it's insulated.

二十二號、十八號等也可以用。只要確保它'的絕緣。

As you can see the more turns you have, the harder it is to pull the wire. But doing

大家可以看到，圈數越多，拉線越難。但做

like I'm doing here works quite well.

像我'在這裡做的工作相當不錯。

Finally, I cut the wire, leaving long ends to work with.

最後，我把鐵絲剪斷，留下長長的兩頭來加工。

And then secure the ends in place by putting them through holes one corner.

然後將兩端穿孔一角固定好。

Next to connect it all together.

接下來要把這一切聯繫起來。

Here's the wiring diagram but I'll show you each connection as I make it.

這裡'是接線圖，但我'會告訴你每個連接，因為我使它。

First remove the insulation from the ends of the coil wires.

首先將線圈導線兩端的絕緣層拆除。

Open the capacitor to its fullest length. That's so that you know how much wire is needed

將電容器開到最大長度。這樣你就可以知道需要多少線了。

to reach inside the box.

以達到箱內。

Then connect one end of the coil to one of the capacitor wires. It doesn't

然後將線圈的一端連接到電容線的一端。它不'。

matter which one.

不管是哪一個。

Then connect the other end of the coil to the other capacitor wire.

然後將線圈的另一端與另一根電容線相連。

Then connect one wire to either of the places where you connected the coil

然後將一根線連接到你連接線圈的任何一個地方。

and capacitor wires together.

和電容線在一起。

Next for the diode.

接下來為二極管。

It has to be a germanium diode. In my case part number 1N34.

它必須是一個鍺二極管。在我的情況下，零件號為1N34。

Find the end of the diode that doesn't have the stripe on it. Connect the other end

找到沒有條紋的二極管的一端。連接另一端

of that wire to that end of the diode.

的那根線到二極管的那一端。

Next, connect another wire to the end of the diode with the stripe on it.

接下來，將另一根導線連接到帶有條紋的二極管末端。

The other end of that wire goes out the top of the box.

那條線的另一端從盒子的頂部出去。

Connect another wire to the other place where you connected the coil and capacitor wires

將另一根線連接到連接線圈和電容器線的另一個地方。

together and run the other end out of the top of box.

一起，並將另一端從盒子的頂部跑出來。

Now you can close the box.

現在你可以關閉盒子了。

Lastly, the earpiece. For this circuit it has to be a crystal earphone, also called a

最後是聽筒。對於這個電路來說，它必須是一個水晶耳機，也就是所謂的。

crystal earpiece. I'm using on I made myself by hot-gluing a hollow tube

水晶聽筒。我使用的是我自己做的熱膠空心管。

to the opening of a piezoelectric buzzer.

到壓電蜂鳴器的開啟。

Connect the wires of the earphone to the wires you just ran out of the top of the box

將耳機的線與剛才從盒子頂部跑出來的線連接起來。

in the previous steps.

在前面的步驟中。

And you're ready to test.

而你'就可以測試了。

To test it, start with the capacitor in some position and rotate the box. The flat side of

測試時，先將電容放在某個位置，然後旋轉盒子。扁平的一面是

the box should be facing a radio station. If you don't know where one is, then keep

盒子應該是面對一個電臺。如果你不知道哪裡是一個，然後保持。

slowly rotating it.

慢慢地旋轉它。

If you don't find something, then readjust the capacitor and try again.

如果你沒有發現什麼，那就重新調整電容，再試一次。

Nice and loud right there. It sounds like news.

很好，很響亮，就在那裡。這聽起來像新聞。

I'll put it in the microphone.

我把它放在麥克風裡。

Hopefully you heard that.

希望你能聽到。

Loud and clear.

響亮而清晰。

Well thanks for watching! Check out my youtube channel, rimstarorg, for more

好吧，謝謝你的觀看!查看我的youtube頻道，rimstarorg，瞭解更多。

videos like this. That includes one on how to make your own crystal earphone. One

這樣的視頻。其中包括一個如何自制水晶耳機的視頻。一個

with a bunch of crystal radio troubleshooting tips. And for variety,

與一堆水晶收音機的故障排除技巧。而對於各種。

one on how a rocket works to get from Earth to orbit using SpaceX's Falcon 9

一個關於火箭如何使用SpaceX公司的獵鷹9號火箭從地球進入軌道的工作原理

as an example.

為例。

And don't forget to subscribe if you like these videos or give a thumbs-up or leave

不要忘了訂閱，如果你喜歡這些視頻，或給一個大拇指或離開。

a question or comment below.

在下面提問或評論。

See you in a bit!

一會兒見！