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Questions tagged [crystal-radio]

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3
votes
1answer
86 views

Multi-band Crystal Receiver?

I'm just getting into radio (inspired by YouTube videos), and like many, I plan to start by building a crystal set (or multiples) before moving up to vacuum tubes (which I prefer over transistors). ...
4
votes
2answers
108 views

Can I create a functional crystal radio using a plastic coil filled with seawater as the inductor?

Pex is cheap and comes pre-coiled, 3/8" pex is 0.360" ID. 1/2" is 0.485" ID Fill with "sea water" using distilled water and sea salt to proper concentration. Use for AM and/or Shortwave coil. ...
3
votes
1answer
55 views

Air Coil AM & Shortwave Crystal Radio Using 1/4" Copper Tubing

Looking to build a crystal radio, need help with the coil. I'm looking to get something to work with 1/4" thin wall copper tubing. Already have some nice diodes and whatever capacitors/resistors I ...
3
votes
3answers
116 views

How do I get my crystal radio to receive?

My 8 year old and I are trying to figure out how to get this crystal radio we made working. It's based off this youtube video. We get clicks when we put the crystal ear piece either side of the ...
5
votes
1answer
731 views

Building a crystal radio with my brother. How does this circuit work?

I'll be visiting home soon after school lets out, and I want to build an AM crystal radio with my little brother. This is the design we'll use: http://crystalradio.net/beginners/ I'll be doing my ...
2
votes
1answer
95 views

feasibility of wireless passive crystal earphones

I just learnt about such a thing as a crystal radio receiver and the following idea came to my mind. I have no background knowledge on electronics nor anything related. What if battery-less earbuds ...