WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Crystal radio
Uncommon card · Science
Crystal radio, an Uncommon card
A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 89
- DEF
- 100
- Power
- 189
- Wikipedia reads a year
- 85,000
Power 189 (ATK + DEF): stronger than 95 % of WikiCards cards.
Crystal radio quiz: 3 questions
Three questions on the Crystal radio card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
This ______ is now called a diode.
Answer
component. This component is now called a diode. From the Crystal radio article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Scuba diving. Scuba diving 170,000 · HPV vaccine 130,000 · Crystal radio 85,000 · Boeing 737 MAX certification 15,000 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- It uses only the power of the received radio wave to produce sound, needing no external power supply.
- It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena.
- This component is now called a diode.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Crystal radio article was read about 85,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 89 and blocks with 100: each hit it takes is cut by 40 %.
How to get Crystal radio
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Crystal radio in the power ranking, all domains together.
- Roberto LuongoUncommon · Society · ATK 92 DEF 97
- Chris HeroUncommon · Society · ATK 89 DEF 100
- Indonesian occupation of East TimorUncommon · History · ATK 90 DEF 99
- EblaUncommon · History · ATK 89 DEF 100
- Justin WilsonUncommon · Society · ATK 92 DEF 97
- Smoking cessationUncommon · Society · ATK 90 DEF 99
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Crystal radio (revision), CC BY-SA 4.0. Photo : Holger.Ellgaard, CC BY-SA 3.0, Wikimedia Commons.
