Picture of Spooky Tesla Spirit Radio
News Flash!!!
The Spooky Tesla Spirit Radio and Mrfixitrick are now featured in a PC game called "Tesla".  Monsters and bats are battled, while helping Mrfixitrick find the seven parts of the Spooky Tesla Spirit Radio. Intriguing background music. From GODD Games at: www.goddgames.com/tesla.html

Have a look at the Crystal Quantum Radio devices of EJ Gold that helped inspire this instructable:  http://www.yoyodyneindustries.com/

"My first observations positively terrified me as there was present in them something mysterious, not to say supernatural, and I was alone in my laboratory at night"
- Nikola Tesla, 1901 article "Talking With The Planets

The Spooky Tesla Spirit Radio is more than just a crystal radio circuit in a jam-jar. It's a sound maker that plugs in to a computer, and makes awesome spooky sounds by responding to electromagnetic fields or light sources in real time.

Athough Tesla used different parts, this radio's basic L-C (Inductor-Capacitor) circuit uses a similar schematic to what Tesla experimented with in his early days. The versatile 1N34A crystal germanium diode used here, substitutes for the tricky rotating nickel detectors and sensitive relays, used by Tesla in the late 1800's. 

You can listen to AM broadcasts with this radio, but it was made to have fun with in other ways. (Besides, AM radio wasn't exactly what Nikola Tesla was interested in...in fact, he believed it was a waste of energy to transmit and receive Hertzian waves!) 

By using a program like Audio Hyjack Pro (Mac), the radio's output is tweaked at the computer to give some great real-time sound effects...and you can record them at the same time. 

In the following accompanying movies, I show how the Spooky Tesla Spirit Radio reacts to lightning, radio frequencies, the light spectrum, the computer screen, RF pulses, electromagnetic fields and more!

In the following video, the Spooky Tesla Spirit Radio is used to give voice to a Mac Hyperspace screensaver! The simple crystal circuit is apparently sensitive to the screen synchronization RF frequencies, and so it provides awesome background sounds...check it out:

The next movie shows "Spooky", the radio, beside a Dancing Ghost homopolar motor. The motor emits electromagnetic waves that are picked up by Spooky's antenna coils, and we hear the results translated through computer software in real time...spooky!!

Here's a movie of the action in the new PC game "Tesla", featuring the Spooky Tesla Spirit Radio;

Remove these adsRemove these ads by Signing Up

Step 1: Parts List And Schematic Diagram

Picture of Parts List And Schematic Diagram
List of Materials

1- Small Jam Jar, (Mason Jar) with large mouth
1- 3 1/4 inch dia Plexiglas (or polycarbonate) cover lid, 1/8 inch thick
1- C1 - 60/160 pf Variable Capacitor (ComtrolAuto #VAR160-1)
1- Extension Shaft and Knob for above (ComtrolAuto #ExtKnob-1)
1- L1 -  680 uh Ferrite Loopstick Antenna (ComtrolAuto #LSA680-1)
1- D1 - Germanium 1N34A Diode (*Allied Stock#: 935-0301) $2.16 ea
1- C2 - .001uf Capacitor (marked 102) (*Allied Stock#: 507-0822) $.21 ea
1- R1 - 47k Resistor (*Allied Stock#: 296-6641) $.05 ea
1- Chassis Banana Jack Red - (*Allied Stock#: 528-0158) $.53 ea
1- Chassis Banana Jack Black - (*Allied Stock#: 528-0159) $.53 ea
2 - (or more for each antenna) Banana Plug (*Allied Stock#: 528-0302) $1.21
2 -3.5 mm Mono Chassis Jack (*Allied Stock#: 932-0260) $1.16
a few inches of 20 gauge hook-up wire
1- Audio Patch Cord, 1/8 inch plug ends

Total Cost less than $30.

Note1: Most of the above crystal radio parts are available in kit #SC-Kit-1 from ComtrolAuto 
Note2:Complete crystal spirit radios that can be adapted are available from EJ Gold at YoyodyneIndustries

Note3: For Each Spiral Pancake Antenna,
6 feet of #14 gauge solid copper wire
Banana Plug

Note4: For the Football Style Antenna,
4 feet #10 gauge solid copper wire.
40 feet of #30 gauge coated magnet wire.
Heavy Paper
Scotch Tape
Hot Glue
Banana Plug

Needlenose pliers
Wire Cutter
Soldering iron
Computer w/ Audio Hijack audio software (Mac), or equivalent

Crystal radio parts and kits available at http://comtrolauto.com/

Step 2: Make a Clear Cover and Drill It

The first step is to create a clear lid so we can see the simple but effective radio components. I chose polycarbonate just because that is what I had on hand. Acrylic can be used, but it won't machine as easily. 
Use a circle cutting attachment on a drill press to cut out a 3.25 inch disc cover lid out of 1/8 inch Lexan polycarbonate.

Next, 1/4 inch holes are drilled in the cover lid for the two banana jacks and for the two audio jacks.

The two banana jacks will receive banana plugs with pre-mounted antennas.

Two audio jacks will also be used. One is for for audio out to the computer, and one is for an optional auxiliary input modulation from a hand gripper or other source.

Drill holes as seen in the photos, or lay out your own hole design. I drilled a total of nine holes;
Two 1/4 inch holes for antenna banana jacks,
Two 1/4 inch holes for audio jacks,
One hole for the variable capacitor shaft, and two small 1/16th inch holes for its screws
and two 1/16th inch holes to feed the diode wires to mount the diode on top of the jar lid (This is for better light-to-sound effects; as the 1N34A diode is light-sensitive)

Step 3: Mount the Components on the Cover

Picture of Mount the Components on the Cover
Mount the Adjustable Capacitor and Banana Jacks in the clear jam jar cover.

For the variable capacitor, I had to find two screws long enough to feed through the 3/16 inch thick cover. A thinner cover will work with standard screws. The variable cap has an optional shaft extension and knob kit found at http://comtrolauto.com/

Mount the 1/8 phono jacks as well. I had to countersink the holes to get the threads to start because of the rather thick plastic cover I used.

Step 4: Prepare the Induction Coil

Picture of Prepare the Induction Coil
There is an option with the Induction coil to run it direct with an antenna connection, or to wrap the Induction Coil with about 10 wraps of 22 gauge wire that runs from the antenna to ground. The first method gives a better chance of a station signal being loud enough with a short antenna. The second wrapped inductor method is best for using a long (20 foot plus) antenna. See schematic for clarification.

I like the inductive method even with a short antenna, because it gives a clearer signal with less 60 cycle hum. The amplitude of sound will be less in AM tuning unless a long antenna is used however. The amplitude can be partially made up by using the human body as an antenna by touching the jam jar ring, which has a connecting wire that goes to the antenna + wire when the lid is twisted on.

The other advantage of wrapping the inductor is that it gets supported inside the jar by the heavier wires.

Step 5: Wiring and Soldering

Picture of Wiring and Soldering
SpookyTeslaSpiritRadioSchematic 2.jpg
Ok, once most components are in place, it's time to wire and solder things up. Direct point-to-point wiring can be used with so few components. Follow the pictures and the schematic for the basic connections.

Only a couple of wires need to be soldered in. Run one ground wire from the middle ground post of C1 to the ground connection on the phone jack. Another wire will go from the antenna to the other C1 post.

Note that the centre connection of the C1 variable capacitor is connected to the ground connection of the phone jack. The 160 pf connection is on the right facing C1 from the top looking down, connecting tabs facing away from you. The 60 pf connection is on the other side of the middle ground connection, and was not used.

The D1 diode is heat sensitive and may fail if over-soldered. Use an alligator clip as a heat sink when soldering its leads. I mounted it on top of the cover to make it more sensitive to light.

The L1 Induction Coil thin wire with black paint goes to ground. The other thin inductor wire goes to the non-ground C1 capacitor connection. L2 is simply 10 wraps of wire around the inductor coil.

Step 6: Make the Tesla Spiral Antennas

Picture of Make the Tesla Spiral Antennas
"The Tesla antenna is a form of wireless antenna or wave launching structure developed by Nikola Tesla in which the transmitted energy propagates or is carried to the receiver by a combination of electrical current flowing through the earth, electrostatic induction and electrical conduction through plasma with an embedded magnetic field."
- Gary L Peterson in "Rediscovering The Zenneck Surface Wave"

This is an area for scientific and artistic license. There is still much debate as to what exactly Tesla was up to with his transmission and reception of power systems. ( See Joel Young's blog comments in Design News Magazine on July 8th, 16th and 28th...

I experimented with two types of Tesla antenna design. The first is similar to the flat spiral "Pancake" coil that is seen in several of Tesla's patents. The second is a peculiar "Football" coil made of two cones.

For the basic spiral antenna, I used a 6 foot length of 14 gauge solid copper wire, and bent the wires by hand, coil by coil. I used a needle nose pliers to begin the core spiral, and after a turn or two, gently but firmly worked the wire around with bare hands. I soldered on a short vertical antenna to the centre loop. In retrospect, It would have been better to make the vertical end part with a one piece construction.

Keep working the wire to eliminate kinks and bends, then make sure the coils are evenly spaced. I soldered on the vertical antenna last.

Step 7: Make a Peculiar Tesla Football Antenna

This coil was one of Tesla's later designs, and is said to have spooky anti-gravity effects when pumped with the correct frequencies and voltages. I won't be working in that high-power range with this un-powered crystal radio !

The core of the Tesla Football Antenna is made with four 2 inch paper cones glued and taped together. The paper cones were doubled up, two on each side, for strength and smoothness.

The 30 gauge wire conical coils are wound laboriously by hand. The thick 10 gage copper wire was carefully bent to conform to the football coil without disturbing the coils of the coil. (Note to self...don't try this again without coating the wires with a resin or glue first, because the coils will start unravelling...)

After this small coil-winding feat, two snazzy Banana Plug ends are put on. These ones were found at an electronics store.

Here's a link to a similar coil that puts out sparks!

Step 8: Testing the AM Radio Circuit

Picture of Testing the AM Radio Circuit
This step is a circuit test of the Tesla Spirit Radio, to see if it works as an ordinary AM radio. Once the wiring and solder connections are double checked, we can test the AM radio part of the device.

Plug in the Audio Patch Cord into the 1/8 inch jack of the radio, and then into the computer "Sound In" port. Launch Audio Hijack (or equivalent PC software). Set up with a basic 10-Band EQ and two or three AU Pitch controls. AU Bandpass and Reverb won't be used for this test...use their "Bypass" buttons. Gain may need to be turned up high. Au Pitch controls at the neutral 0 pitch setting. (See screenshot below.)

Turn the variable capacitor knob and the sounds of a local AM station should come through; if not, a long antenna may be required in your area. Try touching the jar ring or antenna to see if that makes a difference.

If you have no sound at all, then something is likely wrong. Check for a dry solder connection. Also, if too much soldering heat was used close to or on the diode connection, the diode may be burned out. Substitute to check, or use the diode checker function of your multi-meter to test it if necessary.

Step 9: Spooky Effect # 1 - Detect Lightning and Predict Storms

Picture of Spooky Effect # 1 -  Detect Lightning and Predict Storms
"No doubt whatever remained: I was observing stationary waves."
Nikola Tesla, commenting on reception of lightning in his receivers.

The Spooky Tesla Spirit Radio can detect lightning! Check out the main intro movie

You can listen to AM radio if you really need to, but Nikola Tesla spent most of his radio listening time tuning into natural Earth (and beyond Earth) pulses, and the high and low frequency vibrations that were around him. He was a storm-chaser from the comfort of his own laboratory.

During Tesla's Colorado Springs experiments, he would listen in on approaching and receding lightning storms, which he could detect up to hundreds of miles away. He noticed standing waves produced by the lightning that inspired him to develop his wireless power apparatus.

It helps to have a long antenna (be sure it is safely grounded with a spark-gap arrester!), but even with the short antenna, this crystal radio can be made very sensitive with the computer software adjustments. When a storm is near, you can really hear it! (It's a loud crashing sound in the audio ;)

Requirements: Mac computer and Audio Hijack software. "Super-Sensitive Lightning" software setting adjustment, as seen in the screenshot below...and a nearby storm! PC owners will need to use an audio software solution that is able to alter pitch, gain and reverb in real time. And preferably record it.

Here's a fun site devoted to "Nature Radio Signals and strange emissions at very low frequency." http://www.vlf.it/

Step 10: Spooky Effect # 2 - Disembodied Spirit Voices

Picture of Spooky Effect # 2 -  Disembodied Spirit Voices
""The sounds I am listening to every night at first appear to be human voices conversing back and forth in a language I cannot understand. I find it difficult to imagine that I am actually hearing real voices from people not of this planet. There must be a more simple explanation that has so far eluded me."
-Nikola Tesla 1918

Nikola Tesla, and many others of the early radio pioneers, often thought they heard voices in their radio receptions. Both Edison and Tesla claimed to be working towards communicating with disembodied spirits.

Dale Afrey, in the book "The Lost Journals Of Nikola Tesla", says . "At one point Tesla chided Edison for stealing his idea on using a form of radio to contact the dead."

You can get the impression of disembodied spirit voices by tuning close to an AM station, then use the Au Pitch Controls of an audio software such as Audio Hijack to raise the pitch to a squeaky high, ghostly sound. Add Reverb for the final touch. Au Bandpass is also used in this effect. Check the settings in the screenshot below.

Alternately, the AU Pitch can be used to lower the pitch instead of raising it, for a moaning type effect.

Step 11: Spooky Effect # 3 - Make Sound With Light

Picture of Spooky Effect # 3 -   Make Sound With Light
The 1N34A germanium diode in this crystal radio circuit is sensitive to light of all kinds. It responds to sunlight, light-bulbs, laser, flashlights, and even candlelight! The laser will work to activate sound from the radio from many feet away, but only when the laser light is actually moving across the light-sensitive diode.

Light-bulbs affect the radio diode from a couple of feet away, and the 60-cycle hum can be heard from them. The radio or light does not have to move to make sound in this case of AC power.

Candlelight must be close and moving to affect the diode, and then it is a very low frequency that is hard to catch. The AU Pitch control must be raised high to hear the low bass sound from the flame. See CandleSetup screenshot, below.

The use of various light sources to make sound is shown in the main movie.

Step 12: Spooky Effect # 4 - Create Freaky Music

Picture of Spooky Effect # 4 -  Create Freaky Music
The computer monitor, speakers and the computer itself are all sources of cool and spooky sounds for the Spooky Tesla Spirit Radio. You can go for extreme feedback and resonance effects, or you can keep it simple and just hear what's going on inside your computer box.

By altering the AuPitch, Reverb, and BandPass module controls, the normal static, clicks or hums become rich soundscapes. The cool thing is, once the controls are set, the radio does the rest!

All of the sound effects on the main video are generated in the above way. In the following video, the AuPitch controls were set before the main Hyperspace voyage.

Here's another example of making sounds and music live in real time, with another crystal radio I have that's made by EJ. Gold:

Step 13: Spooky Effect #5 - Van Eck Phreaking

Picture of Spooky Effect #5  - Van Eck Phreaking
What is Van Eck Phreaking?

"Van Eck Phreaking is the process of eavesdropping on the contents of a CRT and LCD display by detecting its electromagnetic emissions."

Can a simple crystal radio circuit really sense the colours and movements of windows on a computer screen?? 

Yes it can! Check out the above video... and also the main video that shows colors being discerned electromagnetically by the radio. 

Step 14: Spooky Effect #6 - Make Fright With A Mike

Picture of Spooky Effect #6 - Make Fright With A Mike
Who would have thought it was possible, but the addition of a magnet on the side of the jam jar can turn the radio into a temporary microphone! Experiment with holding a neodymium magnet close to the ferrite coil inside the jam jar. Then talk at or into the jam jar. Hit the record button in Audio Hijack to see if it records the sound. It will be faint in the background...perfect for recording alien or scary voices!

Use the Super-Sensitive audio set-up for this experiment.

Step 15: Spooky Effect # 7 - There's A Woodpecker In Your Modem!

Picture of Spooky Effect # 7 - There's A Woodpecker In Your Modem!
Wireless modems put out a strong EM (ElectroMagnetic) pulse when operating...even if you are not using the wireless part of the modem.

I discovered that a modem pulses at about 10 Hz, and sounds very similar to the controversial Russian Woodpecker radar transmissions. (http://en.wikipedia.org/wiki/Russian_Woodpecker).

Other electronic and electric items such as calculators, cellphones, and computers can be investigated to hear what fields they emit. Motors like a Dremel tool are also fun to listen to...but not for very long!

Step 16: Spooky Effect #8 - Bring A Screensaver To Life

Picture of Spooky Effect #8 - Bring A Screensaver To Life
 In this example, the Spooky Tesla Spirit Radio is placed in front of an iMac computer screen. The radio is able to read the moving RF contents of the screen and make them audible. If it seems impossible that a simple crystal radio could do that, then watch the following...

The "Hyperspace" screensaver is available at download.cnet.com/Hyperspace/3000-2257_4-90475.html

Step 17: Links To Tesla And Spirit Radio

Picture of Links To Tesla And Spirit Radio

Tesla's article "Talking With The Planets" in Colliers Weekly, Feb19,1901 earlyradiohistory.us/1901talk.htm

Here's Tesla's Colorado Springs Notes that show much of his early experiments with radio LC circuits:

Here's a detailed investigation into Tesla's Colorado Springs receiver experiments:

Tesla on Mars:

Two Tesla radio related patents:
Patent # 645576 "System Of Transmission Of Electrical Energy"

Patent #649621 "Apparatus For Transmission Of Electrical Energy"

Michio Kaku's site:   mkaku.org/
"Renowned physicist Michio Kaku explores how mind reading, the routine use of force fields, and other feats that are currently science fiction may become commonplace tomorrow."

Link to EJ Gold's line of BetaBlocker Crystal Radios:

The above controversial video from EJ Gold shows an alternate use for crystal radio circuits... to partially suppress Beta brain waves to allow the Alpha-Theta waves to predominate for better meditation and psychic work.

Decide for yourself if it could be true! 

1-40 of 388Next »
CyrceD10 days ago
How can pay you to make me one of these radios?
JudyD21 month ago

You can call me dumb dora are anything you like but what is this spirit radio for.? I have seen the video's and post. Is it a listening device of some kind. Like a micro phone? That is what I am understanding. And if it is why go to all the trouble? Please email me because I will probably not remember how to get back to this site. I really would like to know what it is for. Also my great great great grandfather invented the radio receiver is this what this is.? Here is the link that explains his invention, his diagrams on how he built the receiver are there also.


Here is my email address if someone could explain to dumb dora please I am interested on what it is and what it is for. Judykdoolittle@gmail.com

Thank you !!

Powertripp5 months ago

Just built this.. I cant get anything but static. No sound reactions to light on the diode or anything. I can get am if I touch the antennas, thats about it.. I quaddrupil checked my connections and even dis-assembled and reassembled.. still absolutely nothing but am radio when touched and static when not touched... Help anyone??

mrfixitrick (author)  Powertripp5 months ago

If you get static and AM when touching, you have done everything correctly. I believe you need to plug into the sound port of a Mac computer running Audio Hijack software set with the Spooky settings... Also, Increase signal by using a 20 foot antenna and ground if you wish.

n71 mrfixitrick1 month ago

"Tesla's spirit radio"? :-) Are you for real? :-)

Been messing with it more.. Still nothing but static.. Diode is non-responsive to light, does pick up my soldering gun though. I used a variable capacitor along with a ferrite loop-stick from an old radio though.. Could that be the problem? What pf does any old radio usually pick up? I got a rad germanium diode by the way; i dont know if that makes a difference?

How can we trace down the original parts list that Nikola Tesla himself used?

You can't. Tesla simply didn't do this.

kaz.sommers2 months ago
Has anyone successfully built one?
Im willing to pay someone to build one for me.
n71 kaz.sommers1 month ago

People are naive, Tesla never did this nor it is any "spirit radio". This is disinformation and I think the creator of this joke is laughing at the ignorance.

n711 month ago

People really believe this is "Tesla's spirit radio"! Ridiculous! :-)

How can one use this with a PC instead of a MAC? Thanks :-)

KaceySama3 months ago

Hiya friends! I've got mine hooked p to a Macbook Pro, which means I had to use a USB external sound adapter since I don't have a sound input jack. Nothing is being picked up by the radio, and I haven't had any luck with light or touch altering the sound. I just get static. Any advice would be hella appreciated and returned with a good joke and a digital wink!

peter.jenko3 months ago

Hi, I've just received this loopstick antenna from ComtrolAuto - it has one black (knitted out of two) and two thin wires (on far left and far right end). Does it matter which thin (non-coloured) wire do I take to solder with non-ground C1 capacitor? Thank you so much for helping a newbie :) Kind regards!

InVIn3 months ago
can I plug in headphones ... directly into the jar...

i hear Nikola Tesla's research was shut down by the government because he posed a threat to their system, can any one tell me why?

lorddoomicus6 months ago

Why did you build it in a glass jar instead of on a wooden base like a more traditional crystal radio? Is there something special about the glass jar, that just building it on a wooden base would not provide?


mrfixitrick (author)  lorddoomicus6 months ago
The glass jar is mostly just a cool idea I thought of, but it does have some scientific basis. The clear glass allows the diode to receive unshielded environmental input such as ambient light, laser, and magnetic and electromagnetic waves without much interference, at the same time protecting the circuit from dust, dirt and young prying hands.

A wooden base is fine...but then it wouldn't be a Spooky Tesla Spirit Radio ! :) Cheers, Rick
julesjjv6 months ago

Hi, thanks so much for this great instructable! I'm just getting to work on mine now, and had a question about the ferrite loopstick antenna. I have a ferrite core (I bought this one, http://www.ebay.co.uk/itm/62mm-Rectangular-Ferrite-Antenna-Bar-AM-MW-LW-Radio-Loopstick-Core-/120852688164?ssPageName=ADME:L:OU:GB:3160), but wasn't sure about the wrapping. Is it just a case of wrapping a thin wire around the core 75 times? In the picture it looks like you have the ferrite core, then something (tape or cardboard?) around the core, then another small bar (what is this, iron?) and then the thin wire wrapped around that. If you could clear up what that is, that would be great. Thanks a lot!

Brockjay7 months ago
I created the spirit radio and It picks up higher frequency waves. Doesn't change a whole lot though.
I am unable to get light to affect it. Different types of lights even. I'm using a PC voxal software program.
Did I wire something wrong? Or is it my sound settings?
mrfixitrick (author)  Brockjay7 months ago
I had to use 3 pitch control modules added in the Audio Hijack software, double double gain, and a lot of fiddling and adjustments to get the light sensing to work. Try a laser first or even close to a 60 cycle lightbulb. The secret is that the laser will not read on the diode except when the light moves on and off of the diode. (i.e. With DC laser it is the CHANGE of light, not the light itself that gives the tone. An AC light will work as continuous tone )

I have played around with all of the settings that I know of. Tried AC and DC lights on the diode.
I have iPhones and iPad's but have been unable to find software that I know for sure works. Maybe one day Audio Hijack will release a PC version.

grenville.wood made it!7 months ago


Objective: build one Spooky Tesla Radio. (see Photo)

Outcome: Successful! Build time: about 4 hours once I had all the parts.

Turned out a little different than the instructions, different size jar (no idea what impact this has...I'm guessing purely aesthetic?)

Variable Capacitor: same as spec

Downloaded patch and using Hijack for Mac

Results: AM radio station test ok

Spooky noises test = Yes but hard to tune in (still working on it) Sounds like a lot of people all talking at once!

Lighting noises = Success!

Still need to make the cone antenna

Questions: Is there a specific set of filters in Hijack required to hear the spooky noises?

Is there a patch for this or do you only hear them once you've made connected the cone Antenna?

Cheers....great kit! :)

Spooky Tesla Radio.jpg
mrfixitrick (author)  grenville.wood7 months ago
I am always happy to see a new Spooky Radio come into the world!

Try these Spooky patches for Audio Hijack.

Spooky Radio Patch 1 https://drive.google.com/file/d/0B1ty3oeDN9qvVzlqdkxOSmxYdTQ/view?usp=sharing

Spooky Radio Patch 2

Cheers, Rick
Hi Rick,

Appreciate you sending the patches, let you know how they go.

bry527 months ago
Is it possible to buy one on eBay premade? I'm not so good with building things
HannahW18 months ago

hi there - do you know if there is an app that can be used on an ipad to filter out the noise from these radios, as an alternative to using hijack audio pro as you suggest above? many thanks!

mrfixitrick (author)  HannahW18 months ago
You can use Splashtop to access your desktop or laptop mac and Audio Hijack. The new Garageband for iPad may be able to handle the job as well...I need to experiment with it to see.
voningraham8 months ago
The Tesla antenna. Great fore RF hunting , It was a tricky thing to wind but had a lot of fun.
mrfixitrick (author)  voningraham8 months ago
Good one! Thanks for sharing it. Tesla said that shape had special levitation characteristics when activated properly! :)
AncleD8 months ago

Hello !
My Name is Oliver and i attend to HTX in Denmark and I want to as my final project, to build and explain how the Spirit Radio works.
I have looked through the references given in this article, aswell as the comments and the internet without luck I'm afraid.

But i was wondering if anyone had any sources, or at least pointers, as to where i can find formulas/equations to describe, primarily, the correlation between light and sound, aswell as the part where you use a magnet turn it into a microphone.

I need this information to prove that this is a do-able project.
If anyone can help me, please send an e-mail to Whirlz2300@hotmail.com
Thanks in advance!

voningraham8 months ago
cool little radio. sounds loud for a crystal set but very cool
Brockjay8 months ago
So I have all the parts except the plexi glass. I got all the recommended parts.
But I can't figure out how to cut the jokes properly on the glass and how many

Hi guys I took a small handheld am/fm radio to bits to remove the loopstick and antenna as this saves you money .

I am playing with different antenna shapes using solid copper wire .

I am going to attach an amplifier and speakers to it rather then the computer will this work ? email me any advice - marktlindsay@hotmail.co.uk Thanks guys .

mrfixitrick (author)  danceswithghosts8 months ago
You are taking apart a radio, and building a radio. It will likely
sound like a radio unless you have a computer to produce the special sounds.
theGNARTeam made it!8 months ago

thanks for sharing this. i have never followed through soldering together a circuit diagram before, but i did with this, and it works. its really weird how when my roommate turns on his florescent lights a few rooms away the spirit radio makes a loud pop sound. i also like listening to the sound of my computer surfing the internet. although, i dont understand how to use the "line in jack" or where that is on the circuit diagram.

max.wallin.149 months ago

hello :) i am an 18 year old that really would like to build one of those. How ever i have a problem: some of the components i need can't be found in Sweden,( my homeland)and it seems that they can only be found in the us... Does anyone know about a good internet page whit components that ship abroad?

Im interested in making one also i would think copper wire from a old electric fan copper coil and ground wire from a drop cord the thick copper wire and small mason jam jar and a coil post from a 70s era car radio manual adjust type should provide the materials

mrfixitrick (author)  max.wallin.149 months ago
ComtrolAuto is my favorite, but they no longer ship outside of US. Here is an Ebay crystal kitl that could work for you...

Thank you :) i think this will work fine for me
1-40 of 388Next »