Radios that work for Free

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The Simplest Way To Spot 2.4GHz RF

Last post by IB4TL « Sat Oct 16, 2021 7:01 pm

by IB4TL » Sat Oct 16, 2021 7:01 pm

When the cool kids are showing off their SDRs it’s easy to forget that a radio receiver can be very simple indeed. The crystal set is one of the...

0 Replies

14 Views

Last post by IB4TL
Sat Oct 16, 2021 7:01 pm
Cheap DIY High Impedance Earphones

Last post by IB4TL « Thu Dec 03, 2020 11:30 am

by IB4TL » Thu Dec 03, 2020 11:30 am

Crystal radios can feel magical, given their ability to tune in audio from distant stations with nothing but the energy from the radio signal itself....

0 Replies

8 Views

Last post by IB4TL
Thu Dec 03, 2020 11:30 am
How Early Radio Receivers Worked

Last post by IB4TL « Fri Jul 10, 2020 1:01 pm

by IB4TL » Fri Jul 10, 2020 1:01 pm

If you’ve ever built a crystal radio, there’s something magical about being able to pull voices and music from far away out of thin air. If you...

0 Replies

12 Views

Last post by IB4TL
Fri Jul 10, 2020 1:01 pm
Hackaday Podcast 070: Memory Bump, Strontium Rain, Sentient Solder Smoke, and Botting Browsers

Last post by IB4TL « Fri Jun 05, 2020 12:01 pm

by IB4TL » Fri Jun 05, 2020 12:01 pm

Hackaday editors Elliot Williams and Mike Szczys bubble sort a sample set of amazing hacks from the past week. Who has even used the smart chip from...

0 Replies

11 Views

Last post by IB4TL
Fri Jun 05, 2020 12:01 pm
Credit Card Chip Used To Make Crystal Radio

Last post by IB4TL « Tue Jun 02, 2020 1:00 am

by IB4TL » Tue Jun 02, 2020 1:00 am

Perhaps the simplest radio one can build is the crystal radio. Using a diode as a detector, the design generally uses less than 10 components and no...

0 Replies

18 Views

Last post by IB4TL
Tue Jun 02, 2020 1:00 am
COVID-19 A Boon for Crystal Radio

Last post by Bubbathegimp « Wed Apr 01, 2020 8:00 am

by Bubbathegimp » Wed Apr 01, 2020 8:00 am

The COVID-19 Virus has proven to be a Boon to people interested in building Crystal Radio. Not only by finding more free time to build, But as Toilet...

0 Replies

1033 Views

Last post by Bubbathegimp
Wed Apr 01, 2020 8:00 am
A video

Last post by Bubbathegimp « Wed Mar 11, 2020 2:47 pm

by Bubbathegimp » Wed Mar 11, 2020 2:47 pm

0 Replies

474 Views

Last post by Bubbathegimp
Wed Mar 11, 2020 2:47 pm
Thinking about getting back into crystal radio

Last post by Bubbathegimp « Thu Feb 20, 2020 3:52 am
Replies: 21
by Bubbathegimp » Wed Jan 09, 2019 11:20 pm
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2

3
Been a while since I fooled around with them. Still have a few spools of magnet wire from Radio Shack, A pair of old Magnetic Headphones,
And a Cats...
21 Replies

2008 Views

Last post by Bubbathegimp
Thu Feb 20, 2020 3:52 am
[Eric] Talks Crystal Radios

Last post by IB4TL « Tue Jan 28, 2020 10:00 pm

by IB4TL » Tue Jan 28, 2020 10:00 pm

The AM broadcast band doesn’t have a lot of mainstream programming on it across much of the United States today. That’s a shame because a lot of kids...

0 Replies

503 Views

Last post by IB4TL
Tue Jan 28, 2020 10:00 pm
radio building books.

Last post by Bubbathegimp « Sat Mar 09, 2019 3:34 pm
Replies: 4
by K9ase » Thu Mar 07, 2019 11:22 am

I've been watching various you tube videos on making crystal sets.
most of the books that get mentioned are out of production and/or close to $100...

4 Replies

754 Views

Last post by Bubbathegimp
Sat Mar 09, 2019 3:34 pm
I guess size does matter!!

Last post by Bubbathegimp « Thu Feb 07, 2019 9:56 am

by Bubbathegimp » Thu Feb 07, 2019 9:56 am

I read a while back, That for a Performance set that wire gauge plays a role in performance, And that there was really not much of an advantage in...

0 Replies

458 Views

Last post by Bubbathegimp
Thu Feb 07, 2019 9:56 am
Beginnings of Radio

Last post by Bubbathegimp « Tue Jan 22, 2019 7:37 am

by Bubbathegimp » Tue Jan 22, 2019 7:37 am

0 Replies

545 Views

Last post by Bubbathegimp
Tue Jan 22, 2019 7:37 am
Crystal Radio Coil and Capacitor

Last post by W9FTV « Mon Oct 08, 2018 9:47 pm
Replies: 10
by Bubbathegimp » Mon Sep 24, 2018 10:59 pm
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2
Theres a guy on E-Bay selling Diamond weave coils using 660/46 Litz on E-Bay.
I have heard of Spider Weave, But never heard of Diamond weave.

I do...
10 Replies

1270 Views

Last post by W9FTV
Mon Oct 08, 2018 9:47 pm
A Modern Take on the Crystal Radio

Last post by IB4TL « Fri Jan 19, 2018 7:00 pm

by IB4TL » Fri Jan 19, 2018 7:00 pm

We’ll admit that has a pretty standard design for a crystal radio. What we liked, though, was the 3D printed chassis with solderless connections . Of...

0 Replies

438 Views

Last post by IB4TL
Fri Jan 19, 2018 7:00 pm
Radio and Phone Speaker has Style

Last post by IB4TL « Wed Feb 22, 2017 10:00 pm

by IB4TL » Wed Feb 22, 2017 10:00 pm

Building a crystal radio isn’t exactly rocket science. Some people who build them go for pushing them technically as far as they can go. Others, like...

0 Replies

494 Views

Last post by IB4TL
Wed Feb 22, 2017 10:00 pm
High Impedance Headphones? They’re In The Can!

Last post by IB4TL « Sun Sep 18, 2016 4:00 am

by IB4TL » Sun Sep 18, 2016 4:00 am

likes to build crystal radios. The original crystal radio builders used high impedance headphones. In modern builds, you are as likely to include a...

0 Replies

435 Views

Last post by IB4TL
Sun Sep 18, 2016 4:00 am
High Performance Crystal Radio

Last post by IB4TL « Fri Sep 16, 2016 10:00 pm

by IB4TL » Fri Sep 16, 2016 10:00 pm

When you think of a crystal radio, you probably think of something simple maybe built out of household scraps. Not if you are . He recently posted a...

0 Replies

458 Views

Last post by IB4TL
Fri Sep 16, 2016 10:00 pm
PhD Crystal Radio has Pizza Capacitor

Last post by IB4TL « Thu May 26, 2016 4:00 pm

by IB4TL » Thu May 26, 2016 4:00 pm

Crystal radios are old news, but great fun. What would happen if a PhD designed a crystal set? By PhD we mean Pizza Hut Deliveryperson and (who may...

0 Replies

426 Views

Last post by IB4TL
Thu May 26, 2016 4:00 pm
Hacking When it Counts: POW Canteen Radios

Last post by IB4TL « Thu Apr 21, 2016 10:01 am

by IB4TL » Thu Apr 21, 2016 10:01 am

Of all the horrors visited upon a warrior, being captured by the enemy might count as the worst. With death in combat, the suffering is over, but...

0 Replies

497 Views

Last post by IB4TL
Thu Apr 21, 2016 10:01 am
Getting Serious about Crystal Radios

Last post by IB4TL « Thu Apr 07, 2016 10:01 am

by IB4TL » Thu Apr 07, 2016 10:01 am

The crystal radio is a timeless learning experience, often our first insight into how a radio works. For some of us that childhood fascination never...

0 Replies

416 Views

Last post by IB4TL
Thu Apr 07, 2016 10:01 am

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