When Ruri discovers her grandpa's old crystal radio, she's determined to restore it.
Request examples:
!req Ruri Rocks 1x12 [02:32]
!req Ruri Rocks 1x12 [Ruri Rocks 1x12]
Syntax: !req EPISODE [quote or timestamp] (max. 8 square brackets)
For quotes, now you can request by index (e.g !req Ruri Rocks 1x12 [10-11]; !req Ruri Rocks 1x12 [20] [24]). Keep in mind, though, that index numbers might change at any time.
You can also generate a copy command with the quotes. Hover the desired subtitle and enter the amount of lines you want to copy.
Note: you must use specific languages with their specific pages/discord channels.
1. Later!
2. See ya!
3. Let's see, what to do once I get home?
4. First thing's first. Ice cream!
5. Must be the Suoh Shrine's summer festival.
6. Grandpa took you when you were little.
Don't you remember?
7. He did?
8. You climbed up onto the sacred boulder.
9. It was a whole fiasco.
10. No way. I don't remember that.
11. Well that's disappointing.
12. I bet Grandpa's shaking his head somewhere.
13. Hey, that reminds me.
14. Didn't you say that Grandpa used to collect rocks?
15. He had all sorts of junk
piled up in the storage room.
16. Really? Do we still have them?
17. Hmm... I'm not sure.
18. We probably tossed them.
19. What? Can I borrow the keys?
Lemme go check!
20. It's so dusty in here.
21. But I might find quartz.
22. Or something even more rare.
23. That box smells like treasure.
24. Ouch...
25. What's this thing?
26. Suoh Tanigawa?
27. I dunno, but I found two rocks inside.
28. Memories Come with Rocks and Noise
29. Memories Come with Rocks and Noise
30. Along with copper wire
and a coil, it looks like.
31. I think it was my grandpa's,
since the box is labeled "Tanigawa."
32. I wonder what this card is.
33. 'Sup?
34. What's that box?
35. That's the thing, we don't know!
36. But we're guessing it's related to rocks.
37. Did you switch up your hobbies or something?
38. I thought you were into stuff
like jewelry and makeup.
39. I still am.
40. I just like this stuff now, too.
41. Huh.
42. Lemme see.
43. Shoot, something rolled away!
44. Found it.
45. S-Sorry, did I break it?
46. I dunno.
47. I'm not even sure if it was
working in the first place.
48. Oh.
49. Hmm... Maybe Nagi-san would know.
50. It's a crystal radio.
51. You don't see these every day.
52. And it doesn't look commercial.
53. Is it homemade?
54. Hold on, Nagi-san. How can you tell?
55. Well, it's obvious if you look
at the coil and detector.
56. What else could it be?
57. That bundle of copper wire
you've got is the antenna.
58. And this is the ground.
59. Self-made ones are rare to come by nowadays.
60. Looks like it was made
sometime after World War II.
61. Nowadays?
62. Have you guys ever heard of them?
63. They used to be popular as magazine freebies.
64. Crystal radios came with magazines?
65. By radio, you mean that radio, right?
66. That's right.
67. B-But... It's so bare looking.
68. Actually, it's pretty old,
but it looks like all the parts are here.
69. But where do you put the batteries?
70. Seto-san, what a great question!
71. Crystal radios don't require batteries.
72. Circuit Layout of Crystal Radios
73. Antenna
74. Earth (Ground)
75. Coils
76. Condenser
77. Detector
78. Earphone
79. The radio waves themselves carry energy,
80. so, it just converts that energy into sound.
81. First, the antenna and ground, or the
aerial circuit, pick up the radio waves.
82. Aerial Circuit
83. Then, the coils and condenser,
or the tuning circuit, select the signal.
84. Tuning Circuit
85. Detection Circuit
86. Finally, the detector, or detection circuit,
extracts the audio signal.
87. When a mineral is used as the detector,
it's called a crystal radio.
88. Crystals are used here!
89. Th-That was a bit hard to follow.
90. So the mineral...
91. Converts radio waves into sound.
92. I don't really get it, but it's cool!
93. Ruri, did this radio come with any earphones?
94. Earphones?
95. Yeah. Radio signals received
through crystal radios
96. aren't strong enough to output
through a normal speaker.
97. So it should require special earphones.
98. I don't think so...
99. We can't listen to it without them?
100. No worries!
101. I've got one right here!
102. Modern standard earphones usually have
103. Rochelle Salt Crystal Earphone
104. Corrugation
105. Rochelle salt
oscillator
106. Aluminum
diaphragm
107. Armature
108. Support
rubber
109. Standard Earphone
110. Magnet
111. Diaphragm
112. Coil
113. an impedance or electrical
resistance of 20–30 ohms,
114. but crystal radios require earphones
with several thousand ohms.
115. That's why we use this crystal
earphone made with Rochelle salt.
116. Impe—what? Who's Rochelle?
117. In other words, crystal earphones can
convert even weak signals into sound.
118. Yeah, but this coil is pretty worn down.
119. You're probably better off building a new one.
120. Coil... Then I'll be able to listen to it?
121. Yup, I think so.
122. I wanna hear what it sounds like!
123. Me, too!
124. Great, then let's gather materials.
125. But Arato-senpai.
126. Don't you need to compile
that data by next week?
127. Bus Stop
Maeshiba University Front Gate
Kanetsu Transport
128. Arato-san seemed pretty busy.
129. And Imari-san has a report due, too.
130. They were nice enough to tell us
everything we need, but...
131. What should we do?
132. Do you want to wait until they can help us?
133. Enameled wire
134. Sandpaper
135. Plastic wrap tube
136. Safety pin
137. Brass plate
138. Let me think...
139. Good luck!
140. Seto-san, are you free after school tomorrow?
141. Do you think we can fix it ourselves?
142. Yeah, let's do it!
143. Enameled wire, sandpaper, a safety pin...
144. What's the difference between
enameled wire and tinned copper wire?
145. Does that have to do with the resistance thing?
146. What is that, anyway?
147. I'm not sure... Maybe how bendable it is?
148. Huh? What are you two doing here?
149. Well, since I broke it and all...
150. You were looking for parts?
151. Yeah. Not that I had any clue
what I was looking for.
152. If you wanted to help us, just say so!
153. Huh? Help you?
154. Yeah. That's what you were up to!
155. Oh well. Fine, why not?
156. Introduction to Crystal Radios
157. Learn How to Make Radios and Electric Circuits
158. History of Radio Broadcasting
159. Learn from the Basics
160. with Illustrations!
161. Electric Circuits
162. It looks sort of...
163. Ugly.
164. Did we miss a step?
165. Hear anything?
166. Not a peep!
167. That's weird.
168. The antenna receives radio waves, and then
the coil and condenser select the frequency.
169. The detector converts the radio waves
of that frequency into sound,
170. which should get picked up by the earphone.
171. How about now?
172. Nope, nothing.
173. I don't hear anything either.
We must have made a mistake.
174. There should be radio waves
floating all around here.
175. My arms hurt.
176. Not a bad job.
177. Yeah, you did great.
178. If you can't hear anything after
connecting the antenna and the ground,
179. there might be something wrong
with the detector.
180. You mean this?
181. This is pegmatite.
182. You can't use these as detectors.
183. Pegmatite
184. Many minerals used in crystal
detectors have a metallic luster.
185. Pegmatite is a type of granite that
forms as magma cools and solidifies.
186. Quartz
187. Mica
188. It's made up of coarse-grained minerals
like feldspar, quartz, and mica.
189. Feldspar
190. I think you can find some near
the shrine close to town.
191. Is something wrong?
192. Why was it in here if it's not even usable?
193. Did Grandpa screw up, too?
194. What exactly are detectors anyway?
195. It's different from tuning, right?
196. That would be the coil's role.
197. I remember! The coils aren't batteries.
198. Voltage
199. Waveform of modulated radio waves
200. Radio waves carrying sound
rise and fall equally
201. in both directions, so you
can't hear anything as is.
202. The detector takes only
one side of this movement
203. through a process called rectification.
204. That's how you can hear sound.
205. At least theoretically.
206. Why just theoretically?
207. In these cases, practically anything
could affect the sound.
208. Say, for example, slight
displacement of the antenna,
209. or even the part that touches the mineral.
210. That sounds impossible!
211. By the way, if you wanna know
the most common choice for detectors...
212. There it is.
213. It's galena like this.
214. Wait! That's the other
tiny rock I found inside!
215. Galena
216. Galena is a lead sulfide mineral
composed of lead and sulfur,
217. and it's the main ore of lead.
218. Rocks Used as Detectors
219. Besides galena, minerals
like pyrite, chalcopyrite,
220. Pyrite
221. Chalcopyrite
222. and zincite can also be used as detectors.
223. Zincite
224. Zincite!
225. Why not try a bunch of ore for fun?
226. Senpai, have those files arrived yet?
227. Nope, not yet.
228. I figured... I'm starting to run out of time.
229. Nagi-san, are you still busy?
230. Sorry, just for a bit longer.
231. Okay...
232. Sounds a lot harder than we thought.
233. A lot harder than we thought.
234. I bet Grandpa gave up on this thing, too.
235. That's why it was in the storage room.
236. So it's either unfinished or a bust.
237. I doubt that.
238. How would you know?
239. The proof is here.
240. On this card.
241. Is that the card that was in the box?
242. Yup, I got curious so I dug around.
243. This is a reception verification card,
also known as a QSL card.
244. Verification Card
245. In other words, whoever owned this radio
confirmed radio reception
246. and had this card issued as proof.
247. Cool.
248. That reminds me, my uncle does
some ham radio on the side.
249. He always said it was cool connecting
with distant people you don't know.
250. It feels so different from today's technology.
We have smartphones now.
251. But I get why it feels good to
connect with others like that.
252. Whether it's today or back then.
253. Yeah... You're right.
254. Okay! Let's try this again!
255. Nagi's Respite
256. To hear sound with a crystal radio, you need an earphone that converts electrical signals into audio. In the past, a substance called Rochelle salt was necessary for making such earphones.
Japan has a history of promoting wine production during wartime in order to obtain this Rochelle salt. Grapes contain a substance called tartaric acid, which appears during the wine-making process as a sediment or tartrate crystals, commonly referred to as "wine stones" in Japanese, in the barrels used for storage.
Rochelle salt is made using these tartrate crystals as a raw material. However, at the time, the main use for Rochelle salt was not radios, but rather in listening devices installed on communication equipment and submarines.
For this reason, wine production was encouraged by the government during the war, and while the production of other alcoholic beverages declined due to regulation, wine production tripled compared to pre-war.
Today, tartrate crystals are often mistaken for things like broken glass crystals and are typically removed from mass-produced wines. However, many wineries deliberately leave them in place to avoid altering the natural quality of the wine. When present, they can often be seen on the cork or at the bottom of the bottle. Since the components of tartrate crystals are also used as food additives, their presence poses no problem.
257. Wine
Stones
258. Nagi's Respite
259. If you're someone who enjoys listening to the radio, you may know something known as a QSL card, or commonly known as a "veri card" in Japanese.
The term comes from "Verification Card." When a radio listener sends a reception report to a station stating they were able to receive the broadcast from a certain location, the station sends back a QSL card as a token of appreciation. Each card is uniquely designed and serves as official confirmation that the broadcast was received.
Some radio stations have stopped issuing QSL cards due to declining demand, but reception reports are still valuable data for stations to verify the reach of their broadcasts. If you're interested, you should try sending one yourself. If you can pick up overseas broadcasts, you might even receive QSL cards from international stations.
However, reception reports must be based on actual radio reception, not internet streaming, and these reports include some technical terms, so it's a good idea to look up how to write one before getting started.
260. Why not travel
with a radio on your next trip?
261. What's this?
262. It's garnet.
263. But it might be too small
to use as a detector.
264. Manganese might be a good fit.
265. Whoa, nice.
266. With all these rocks, we could
make our own crystal radio.
267. Great idea!
268. All right, let's start with sapphire!
269. I'd like to try zincite, too.
270. Let's use these weird looking rocks, too.
271. Hey, I go first. And handle them with care!
272. Huh? I think I hear something.
273. Really?
274. Yeah.
275. I can hear it, too.
276. Lemme hear!
277. Sure.
278. Is this... static noise?
279. It sounds kinda like words, too...
280. Hang on one second.
281. Let's try using this.
282. What's that?
283. This is germanium diode.
284. Imari-san gave it to me the other day.
285. She said we could use it in case
the rocks don't work.
286. Germanium Diode
287. A diode made from
germanium, a semiconductor
(an electronic component with
detection function).
288. Germanium diodes have good sensitivity, so
they can receive even weak radio waves well.
289. Germanium is a material
that has semiconductor properties.
290. High
(easily conducts electricity)
291. Electrical conductivity
292. Low
(does not easily
conduct electricity)
293. Conductors
294. Semiconductors
295. Insulators
296. Iron, nickel, gold, silver, copper
297. Germanium, seawater
298. Silicone
299. Paper, pure water
300. Polyethylene, ceramic, glass, rubber
301. Insulators don't easily conduct
electricity, while conductors do.
302. Semiconductors are in between.
303. They conduct electricity
under certain conditions,
304. which makes them the best fit
for electronic parts.
305. There!
306. That should do it.
307. You sure? That's it?
308. Imari-san told me so. I wouldn't doubt her.
309. I can hear it...
310. Really?
311. Yeah.
312. We did it!
313. Way to go!
314. Looks like it's built correctly.
315. Yeah.
316. Finally, we're done.
317. Man, I'm beat.
318. Want to call it a day?
319. Sounds good.
320. Actually... Can we try again
with that first rock?
321. Huh? We got it to work, though.
322. But my grandpa got it to work with this.
323. So I wanna make it happen, too!
324. Fine then.
325. But now what?
326. Imari-san and Arato-san both told us
that minerals don't make stable detectors.
327. We'd have to make up for it somehow.
328. What if the radio waves were stronger?
329. How do we do that?
330. Oh yeah.
331. Go somewhere higher!
332. If only Grandpa left me a hint or something...
333. Wait, didn't Nagi-san mention something
about pegmatite around here?
334. Yeah, she said we could find some at a shrine.
335. Nice, which shrine?
336. Umm... I'm trying to remember.
337. A shrine... with big rocks...
338. There's a few of them around here.
339. Suoh Shrine!
340. Suoh Shrine
341. Suoh Shrine
342. I didn't know they had a festival.
343. We should've come then instead.
344. It'd be too loud, though.
345. Oh yeah, good point.
346. Hey, Nagi-san!
347. Right now?
348. Yeah, we're at Suoh Shrine.
349. Huh? Why do you sound so surprised?
350. Mhmm. Yeah.
351. Okay, we'll wait here.
352. Nagi-san and Imari-san said
they're heading over here.
353. What were they surprised about?
354. That we were here, I guess.
355. What do you mean?
356. They said they'd explain later—
357. Oh my.
358. Visiting the shrine so late?
359. No! I mean—yes!
360. Not the shrine necessarily, but...
361. We're looking for a place
to listen to our radio.
362. Radio?
363. Yes.
364. It's called a crystal radio,
and it belonged to my grandpa.
365. It had this shrine's name written on the box.
366. Right here.
367. If that's the case, you should be able to
listen to it by the sacred boulder in the back.
368. Assuming nothing has changed.
369. Make sure you get home before
it gets too late, Tanigawa-kun.
370. You know that guy?
371. Nope. Not at all.
372. Hey there!
373. Sorry we're late.
374. Nagi-san!
375. Imari-san!
376. Hey, I'm Aoi.
377. You must be Ruri's friend. Nice to meet you.
378. Good to meet you!
379. Yup.
380. Nagi-san, apparently we can
hear the radio by the boulder.
381. Come on, let's go!
382. Okay, let's see.
383. How did you figure this place out?
384. I saw "Suoh" on the back of the lid,
and it just came to me!
385. Why are you both visiting today?
386. QSL cards include the coordinates
of the location of reception.
387. Huh? I wish we would have
figured that out sooner.
388. Wow.
389. This is one giant rock.
390. Japan's full of spots for megalith worship.
391. They're thought to house gods.
392. Grandpa!
393. This spot is it... I can feel it.
394. It feels nostalgic somehow, even though
they're radio waves in the air today.
395. It's a weird feeling.
396. Let's visit this place again.
397. Yeah.
398. Sure.
399. I wonder if Grandpa had a hard time
making this crystal radio, too.
400. Kinda feels like we're connected across time.
401. The IC cards we use for transportation today
also extract energy from radio waves.
402. They power the IC inside the card,
allowing it to read and write data.
403. It's the same technology as crystal radios.
404. So in a way, we still use
crystal radios in our everyday life.
405. That's so cool.
406. Crystal radios are still relevant today.
407. We're connected...
both in spirit and technology.