Step-by-step instructions for making a tunable crystal radio. This is a radio that gets its power from the radio waves. I made it almost entirely from junk except for the diode (1N34 germanium diode) and the earpiece (though you can use a speaker from a phone instead.) The capacitor is made from aluminum foil and a paper towel roll. The coil is rolled on a toilet paper roll. The wire is enameled magnet wire. For the antenna I use a 15 foot wire laid out on the floor. For the earth ground I connect a wire to the ground in the household wiring.
I originally got this circuit from the book “Radio Receiver Projects You Can Build“ by Homer L. Davidson.
For this circuit, the diode must be germanium. The following is a partial list of germanium diodes that should work:
1N34A, 1N60, 1N91, 1N119, 1N270, 1N277, 1N283
The following are not germanium diodes and may need a long antenna or a powerful radio station nearby to work:
1N4148 (silicon, found on a lot of circuit boards), B16 (
0 views
28
8
4 days ago 00:03:55 5
English Christian Song | “Those Who Are Not Acknowledged by God“
4 days ago 00:00:30 1
hadama #funnyclip #baby
4 days ago 00:04:35 4
Jeff Bezos’ $10M Venice Wedding: Inside the Lavish Celebration & Celebrity Guest List | NEWSDRIFT
6 days ago 00:12:56 0
Google’s AI Found a Glitch in Reality — And It’s Getting Worse
6 days ago 00:00:34 1
Background suppression optical sensor! High sensitivity, strong stability, handle any environment.
6 days ago 00:03:02 0
CryptoPromo – How to Market a Crypto Project in 2025 (Step-by-Step Guide)
6 days ago 00:14:02 1
DIY Puffy Boxy Quilted Patchwork Travel/ Makeup Bag Swing Tutorial
6 days ago 00:07:36 1
P Diddy Darts Eyes at Federal Prosecutor as She Rips Him in Closings
6 days ago 00:35:25 0
Теория Большого Взрыва — убита Джеймсом Уэббом?
1 week ago 00:00:13 0
My Home’s ’Luxury Feel’ Secret: Wood Blinds Are This Beautiful!
1 week ago 00:52:26 1
WWII: The Secret Financial Deal That Kept Hitler in Power - Historical Documentary - AMP
1 week ago 00:13:32 1
Surprising Way to Support Your Liver and Lose Fat!
1 week ago 00:07:47 0
The World’s First Flying Humanoid Robot
1 week ago 00:30:59 1
Шью детское лоскутное одеяло. Одеяло за час. Лоскутное шитье, остатки в дело. Пэчворк.
1 week ago 00:06:49 0
Tutorial: How to make your first edit in Liquipedia
1 week ago 00:02:46 1
‘Real Time’ Crowd Roars for Bill Maher’s Relentless Truth Bombs
1 week ago 00:36:19 0
You Won’t Believe How Easy This Crochet Tote Bag Cover Is!
1 week ago 00:10:08 0
Beautiful Crochet! How to Crochet with Beads/Crochet Video Tutorial/Author’s Design
2 weeks ago 00:01:03 2
The Who - I Can’t Explain | Main Riff Guitar Lesson + TAB
2 weeks ago 00:02:16 1
Baseball 9 Hack/MOD APK iOS & Android - How to Get Baseball 9 Free Gems, Coins, Recruit Tickets
2 weeks ago 00:04:15 4
Ronan Keating - When You Say Nothing At All (Lyrics)
2 weeks ago 00:18:05 0
US Using Israel to Provoke Iran War, Deny Responsibility, Minimize Retaliation
2 weeks ago 00:16:09 23
No Comms BOUT! | Jena Bishop v Elina Kallionidou | Full Fight | Bellator 291
2 weeks ago 02:07:57 0
Shocking Truck Crashes Caught On Camera You Have To See To Believe