He probably learnt to talk that way in chat rooms filled with students.

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My first AM radio was a crystal radio. Worked great and I could pick up CHUM AM in Toronto just fine!

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Bill
Smart Kits build Smart People
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Yours must have been better than mine. I could never get CHUM.


Maybe it was because I was in California?

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Ron

 

He may have been nearer to the transmitter than you, even then there are the oddities of medium wave transmision which can make the signal strength stronger 200 miles away than 50 miles away.

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I grew up in central California. I built several crystal sets, but none were very sophisticated, and I was lucky to be able to get the 2 or 3 local stations.
I had this wonderful (at the time) book written circa 1920 by Hugo Gernsback. It had plans for several radios, including the original oatmeal box crystal set (at least that's what I remember). I built one, and remember hunting all over town for AWG22 double-cotton-covered wire (I didn't understand insulation). I finally found some at an electric motor rewinding shop. This was about the time of the invention of the superheterodyne receiver, but the most complicated design in the book was for a 4 (or maybe 3, I can't remember) stage TRF receiver. It had designs for various detectors, including one which consisted of a little J-hook of Wollaston wire contacting some nitric acid, and one or more coherers. I can't remember the name of the book, but I wish I still had it.

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Ron

 

CHUM radio was about 20 miles from the house, no problem. My crystal set wasn't a pretty as this one though.

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Bill
Smart Kits build Smart People
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when i was a kid i never understood how a cyrstal radio worked because i thought the crystal worked like the crystal ocillator in a cb radio. i didn't know it was to make a diode

 

When I was a kid, I was given a "ROCKET RADIO". It was a lot of fun.

Looked like the center one in this picture:
http://www.crystalradio.net/misc/rocket/index.shtml

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RadioRon

 

whats a rocket radio? my uncle gave me a simple kit from radio shack. it was a piece of cardboard witht the components drawn on it and springs sticking up that you wedged wire into the coils to make contact to conect the pieces. it had an earplug
for the speaker.

 

Mine looked more like this

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Bill
Smart Kits build Smart People
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mine was very similar to that. if i grounded it through the receptical in the house i could actually pick up a station

 

I remember a crystal Radio ( which I realised after my degree in science) in (1954),at my 9th year of age. Defence personel has installed for short wave and we were also allowed to listen to Radio Srilanka from a distance of one thousand Miles. Perhaps he must be using some High impedance headphones.

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Sarma.

 

I found my heat register vent made a good ground, a long wire out my bedroom window made a great antenna.

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Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com

 

Yes Bill, Many times it would be a issue with good earth to the Receiver.The effectiveness depends more on that. Off late it is a problem finding Germanium diodes like OA79 or 1N34A. Perhaps we have to salvage from old scrap and use. I only wonder whether schottky diode could be used instead?

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Sarma.

 

I got excellant results from my crystal radio when I used the outer screen of the TV aerial's coaxial cable as an aerial and the radiator as an earth connection.

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