Thanks for this Billy, I've been nothing but amazed at your ingenuity and dedication to science. Keep it up, you may not have millions of viewers, but the viewers and subscribers you have are extremely appreciative of your work. Thanks for posting so you can inspire others.
Very creative. I like using the credit card chip as a diode. I would have never thought of that. The pill bottle spiderweb coil was also very good. Bravo.
Nice little crystal set. It would make a good project for a young person learning about electronics and radio. I did notice that you showed that varying the coupling can make the signal strength for some stations peak when the coils are not at their closest positions. I always found that interesting.
Joseph , thanks for your good words. Yes. I found the right tapping at the antenna coil and the right coupling between the antenna coil and the tuning coil are the most important factors for a successful reception of stations in a crystal radio, apart from the proper impedance matching in the entire path from the antenna to the detector to the earbuds, given the same conditions in the antenna and earth set up.
Had been gifted a xtal rig 20 years ago. A 80 year old told me to (take care of it for him) on cleaning the rig i found a date of April 27 1921. Name and address and call letters. What amazes me it still works. And for several years I have listened to the army navy game. My head phones are Baldwins. Also I go a radio shack(r) af amp. For crowd demos. It also sports a DIODE Sylvania(r) for when I don't want to mess with the "cat whisker". Don't knock em that Crystal radio hangs in there hi hi odn-1
Witam,👍super szkoda że nie ma polskich napisów 😢,chcialbym powtórzyć twój pomysł i lepiej poznać szczegóły budowy radia 👍 pozdrawiam serdecznie z Polski🇵🇱🖐️
I modified a small transformer to have one input and two output, one for my 500 ohm earbud, the other to feed to my iPhone mic jack for recording. I make it smaller for portability for field tests. A bigger transformer with the same step down ratio will perform better. See my video here: ruclips.net/video/D3n53TAKj54/видео.html
If you also tune the antenna coil, you can receive even weaker stations. Tuning on it is quite broad but having it on resonance, does make the signal stronger.
I purchased them from the mainland China Taobao.com and shipped to HK. Shipping cost is not expensive. I know of an eBay shop that sells these. Reach out to the shop keeper of this eBay shop he may be able to help ebay.us/LUkXNH
I designed this to operate on the AM band. But due to limitation of components, it currently operates from 500 kHz to 1600 KHz. Though I found that by removing the earth and only attaching a 15 meter antenna, it catches a strong Short Wave station broadcasting from Taiwan to my place in HK
Hey Billy. Love your channel. So many great ideas. Thanks!
Very goooood friend.
Thanks for this Billy, I've been nothing but amazed at your ingenuity and dedication to science. Keep it up, you may not have millions of viewers, but the viewers and subscribers you have are extremely appreciative of your work. Thanks for posting so you can inspire others.
Very creative.
I like using the credit card chip as a diode.
I would have never thought of that.
The pill bottle spiderweb coil was also very good.
Bravo.
Thanks for posting. I liked your concept of building Crystal Radio.
Thanks for sharing your build. It is awesome.
I love the can capacitor idea!!
Nice little crystal set. It would make a good project for a young person learning about electronics and radio. I did notice that you showed that varying the coupling can make the signal strength for some stations peak when the coils are not at their closest positions. I always found that interesting.
Joseph , thanks for your good words. Yes. I found the right tapping at the antenna coil and the right coupling between the antenna coil and the tuning coil are the most important factors for a successful reception of stations in a crystal radio, apart from the proper impedance matching in the entire path from the antenna to the detector to the earbuds, given the same conditions in the antenna and earth set up.
Had been gifted a xtal rig 20 years ago. A 80 year old told me to (take care of it for him) on cleaning the rig i found a date of April 27 1921. Name and address and call letters. What amazes me it still works. And for several years I have listened to the army navy game. My head phones are Baldwins. Also I go a radio shack(r) af amp. For crowd demos. It also sports a DIODE Sylvania(r) for when I don't want to mess with the "cat whisker". Don't knock em that Crystal radio hangs in there hi hi odn-1
Witam,👍super szkoda że nie ma polskich napisów 😢,chcialbym powtórzyć twój pomysł i lepiej poznać szczegóły budowy radia 👍 pozdrawiam serdecznie z Polski🇵🇱🖐️
просто великолепно. Очень хочу подобное повторить.
Good one Billy, thanks!
Very nice
Awesome job Sir, thank you for sharing! You are truly a gifted person..
Very nice !
My next project - thanks Billy!!!
Nice idea, the beercan capacitor. You're a real inventor. Can one use a bigger transformer or is it a special model?
I modified a small transformer to have one input and two output, one for my 500 ohm earbud, the other to feed to my iPhone mic jack for recording. I make it smaller for portability for field tests. A bigger transformer with the same step down ratio will perform better. See my video here: ruclips.net/video/D3n53TAKj54/видео.html
If you also tune the antenna coil, you can receive even weaker stations. Tuning on it is quite broad but having it on resonance, does make the signal stronger.
Good project man
Nice system👍
Nice results, awesome!! Where you can find the litz wire you used in your radio?
I purchased them from the mainland China Taobao.com and shipped to HK. Shipping cost is not expensive. I know of an eBay shop that sells these. Reach out to the shop keeper of this eBay shop he may be able to help ebay.us/LUkXNH
New "fox hole" radio. :)
Which was the best performing rectifier?
The MOS FET , then diode, then credit card chip, then crystal
NIce, what frequencies does this operate on?
I designed this to operate on the AM band. But due to limitation of components, it currently operates from 500 kHz to 1600 KHz. Though I found that by removing the earth and only attaching a 15 meter antenna, it catches a strong Short Wave station broadcasting from Taiwan to my place in HK
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