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Forum Index : Electronics : digital radio transmitter
| Author | Message | ||||
| gmwheeler Newbie  Joined: 14/10/2013 Location: AustraliaPosts: 3 |
(Sorry, if there is a more appropriate forum for this topic please say...) I'm sure you all know about those little FM radio transmitters designed to send a signal to a fm receiver close by. Typically to send a mp3 audio to a car fm receiver. Well I have a need for a similar device, but to send a signal to a DIGITAL radio close by. Any ideas, anyone know of a commercially available device? Even a simple circuit so I can build one would be helpful. Thanks. |
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| irishron40 Senior Member  Joined: 22/09/2014 Location: IrelandPosts: 251 |
Hi , I just started building this 30 min ago. lol https://www.youtube.com/watch?v=gt7fBp5v4lg hope this is what you are looking for ron |
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| davef Guru  Joined: 14/05/2006 Location: New ZealandPosts: 499 |
What is a DIGITAL radio? Do you mean a SDR (Software Defined Radio)? |
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| Pete Locke Senior Member Joined: 26/06/2013 Location: New ZealandPosts: 181 |
To send a digital signal to a digital radio. First and obvious question is what frequency is your digital radio looking for? Is is in the VHF or UHF band? Or are you looking for a send/receive system to then plumb the digital signal into? Bit more info on your part might help answer the question. Cheers Pete'. |
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| gmwheeler Newbie Joined: 14/10/2013 Location: AustraliaPosts: 3 |
NO! I want a digital (DAB+) transmitter, not an FM transmitter. |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9308 |
Due to the complexity of DAB+ transmitters, they are NOT cheap. They tend to start at about 23 grand for 15-watts. The complexity of them makes them uneconomical to produce in output powers less then that. 15W output is the SMALLEST one I have been able to find - most are 30-50 watts output. ANY of those WILL need a transmitter licence to run, or the "Radio police" will be paying you a call. This also adds another bucket-load of cash to the total price, by the time you pay the Government license fees. Unlike more traditional FM transmitters, DAB+ transmitters are totally digital(as you probably know), and are pretty intensive in the electronics side of things, as they are essentially purpose-built computer systems in their own right. 
Here is one, if you feel like spending 20 grand or so.... 
I did find this transmitter which appears to be a home-made kit type thing for a DAB+ transmitter, but it is relatively complicated, and you have to configure a few things(via Linux by the look of it), and you would have to be able to make PCB's and solder 0.5mm QFP's, but it might give you some ideas to play with. This link has a link to a YouTube demo video, which might be useful. Smoke makes things work. When the smoke gets out, it stops! |
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| gmwheeler Newbie Joined: 14/10/2013 Location: AustraliaPosts: 3 |
Grogster, Thanks for this information. It's what I wanted to know! Yep looks a bit too complicated for the backyard shed! :-) --------------------------------------- Due to the complexity of DAB+ transmitters, they are NOT cheap. They tend to start at about 23 grand for 15-watts. The complexity of them makes them uneconomical to produce in output powers less then that. 15W output is the SMALLEST one I have been able to find - most are 30-50 watts output. ANY of those WILL need a transmitter licence to run, or the "Radio police" will be paying you a call. This also adds another bucket-load of cash to the total price, by the time you pay the Government license fees. Unlike more traditional FM transmitters, DAB+ transmitters are totally digital(as you probably know), and are pretty intensive in the electronics side of things, as they are essentially purpose-built computer systems in their own right.
Here is one, if you feel like spending 20 grand or so....
I did find this transmitter which appears to be a home-made kit type thing for a DAB+ transmitter, but it is relatively complicated, and you have to configure a few things(via Linux by the look of it), and you would have to be able to make PCB's and solder 0.5mm QFP's, but it might give you some ideas to play with. This link has a link to a YouTube demo video, which might be useful. |
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