Cap'n Refsmmat Posted June 1, 2004 Share Posted June 1, 2004 I was wondering: How easy would it be to make a radio at home with common materials? And how cheap? This radio would cover as many frequencies as possible... And please, I don't know a lot of the things like "Use a ___ resistor," I'm not that much of an electronics person. Link to comment Share on other sites More sharing options...
BPHgravity Posted June 1, 2004 Share Posted June 1, 2004 Look Here: http://www.scitoys.com/scitoys/scitoys/radio/radio.html Link to comment Share on other sites More sharing options...
jgerlica Posted June 2, 2004 Share Posted June 2, 2004 a bit of magnet wire and a germanium diode.....or a piece of galena will make you a workable AM set. Link to comment Share on other sites More sharing options...
Dave Posted June 2, 2004 Share Posted June 2, 2004 A simple AM radio is pretty cheap in terms of components, although if you want a fairly decent crystal radio you're gonna have to get stuck into some of the electronics a bit. I've found the easiest way to get involved and stuck in is to buy some of the 100-in-1 electronics kits where they have a bunch of stuff from integrated circuits to simple transistors etc that you can attach to eachother by using small bits of wire. They're great fun, cheap, and you can build a lot simple electronic circuits with them. Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted June 2, 2004 Author Share Posted June 2, 2004 I was thinking of transmitting and recieving, like from house to house. Link to comment Share on other sites More sharing options...
BPHgravity Posted June 2, 2004 Share Posted June 2, 2004 I was thinking of transmitting and recieving, like from house to house. Try using two plastic cups and some string Link to comment Share on other sites More sharing options...
YT2095 Posted June 2, 2004 Share Posted June 2, 2004 if you want to transmit as well, then you`ve got no chance without electronics knowledge how far is the house? is it line of sight? would you consider other means of comunication? Infrared or a wired intercom? you could just buy some cheap walky talkies, and convert the antenna to match the frequency, thereby optimising its efficiency and boosting it`s effective range and you`de not be breaking any FCC regulations either Link to comment Share on other sites More sharing options...
Dave Posted June 2, 2004 Share Posted June 2, 2004 Transmitter circuits are a bit more complicated than the receiver circuits as well. Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted June 2, 2004 Author Share Posted June 2, 2004 if you want to transmit as well' date=' then you`ve got no chance without electronics knowledge how far is the house? is it line of sight? would you consider other means of comunication? Infrared or a wired intercom?[/quote'] It's just down the street. And by that scitoys page, it doesn't look too complicated to make an AM transmitter. All I need is the parts, and that's easy. Link to comment Share on other sites More sharing options...
YT2095 Posted December 10, 2004 Share Posted December 10, 2004 And by that scitoys page, it doesn't look too complicated to make an AM transmitter. All I need is the parts, and that's easy. that`s great from someone that stated from the start: "And please, I don't know a lot of the things like "Use a ___ resistor," I'm not that much of an electronics person." *Sigh*.... anyway, How did you get on with it? Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted December 10, 2004 Author Share Posted December 10, 2004 Never bothered. It was a good idea, but I never had the time. I spend a lot of my time programming my calculator to do things, rather than building stuff. Link to comment Share on other sites More sharing options...
Douglas Posted December 10, 2004 Share Posted December 10, 2004 Transmitter circuits are a bit more complicated than the receiver circuits as well. Actually, they're roughly the same, but fed backwards. In the case of the receiver, it's the antenna, a couple of conversions and a transducer (speaker) for audio. In the transmitter, it's the transducer (microphone) a couple of conversions, and the same antenna. 1 or 2 watts is fine for house to house communications. For a single frequency, you could have a high Q antenna. Link to comment Share on other sites More sharing options...
[Tycho?] Posted December 14, 2004 Share Posted December 14, 2004 Whats Q? Link to comment Share on other sites More sharing options...
5614 Posted December 14, 2004 Share Posted December 14, 2004 Q normally referrs to charge but does "a high charge antenna." sound right? Link to comment Share on other sites More sharing options...
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