A demonstration of a crystal radio - Part 1

[lostsound2001]

cool chip .it's what I call real old school...Peace Old Hippie

[MrDaytonShaw]

do they still sell them???

[jamesabout]

The ear plugs for a crystal set can be found on ebay. I bought a pack of 5 or about eight dollars delivered to my mailbox. How good is that.

[picaticatara]

Would more or less coil get you to a higher frequency?

[va4cqd]

@picaticatara

less coil higher freq

[jsjassem]

good job man

[renekenshin6573]

High impedance headphones or crystal earphones are quiet rare so most enthusiast attach audio matching transformers on the output

[Ilovemyoldguitar]

What heppened to the focus? I thought my monitor was on the way out.

[vk3ye]

@okrustyone not 3AW - for some reason it's the weakest AM station here and a struggle on a crystal set. 3AW's sister station, 3MP, is the strongest followed by the ABC stations.

[okrustyone]

3AW Melbourne.

[jokgi]

You could also have another front end that takes all the AC "noise" on the antenna, use a diode based voltage multiplier and power a transistor amp.. Just a thought...

[ajboomboom5]

whats the power output from the radio? i want to try this but with a thousand radios =/

[vk3ye]

I don't know but it would be in the microwatts region. It would be better to have fewer high efficiency crystal sets - some have been able to get them to drive speaker and there should be details on the web.

[vk3ye]

Yep high impedence phones. I couldn't find them when I did Part 2 so I used a rocking armature telephone earpiece instead. Not quite as high impedance as the headphones but still good volume possible.

[coolbluelights]

those are high impedance headphones right?

[WilltechOnline]

5 stars for Melbourne

[blackle4ps3]

could use vibration to make power

[TankSombrero]

Yes,however,the vibration is a result of power. Why not harness that DC power for work..

[Ni213Ki]

I like the video, but where does the crystal go?

[Amishman35]

The diode goes just before the earphone. If you can't get any stations, you could also make a radio, though a powered one, using an LM386 amplifier, hook a diode to the pin 3 then hook a coil of wire across pins 2 and 3 as well as a variable capacitor across pins 2 and 3. ---Another place to hear radio stations is on a daisy chained pair Radio Shack amplified 9 volt speakers. I hooked the TV antenna into the input of one, then fed the speaker out into the other, and I could hear stations.

[freeduke98]

The headphone is made of crystals. Ordinary dynamic headphones will not work for this set.

[Pujc]

Nagyon jó , egyszerű és jól működik :) Végre egy normális kommenter !KÖSZY!

Its wery good, and easy & work well good:) Finally

a one normal commenter !THX!

[dlouis95]

Pritty Cool