----- Original Message ----- From: "solarwind" To: "Microcontroller discussion list - Public." Sent: Friday, April 02, 2010 09:18 Subject: Re: [EE] Playing with radio - which band should I use? On Fri, Apr 2, 2010 at 11:57 AM, Michael Watterson wrote: > No licence for user, maybe, but you can't self build CB (27MHz) in most > countries. It has to be an approved product. > > You can self build on 28MHz if you have a Amateur licence. AFAIK only > Licenced Amateurs can self build without getting the equipment certified. > > Without a spectrum analyser, really you have no idea what frequencies a > home built transmitter might output on. I was designing 870MHz/ 920MHz > radios and an amplifier was oscillating at 4GHz to 6GHz! (We had HP141T > with 18GHz plug in). Nowadays $2 433MHz Colpitts/ SAW based oscillator > *might* have a 6GHz ft transistor. If you built it wrong the SAW > might not set the frequency. > > If you want to experiment with Transmitters get a dummy load/through > sampler and a Spectrum Analyser. > > If you want to experiment with Aerials and Wireless transmission, get an > Amateur licence. That's what it's for. :-) Till last year the official > Irish title was "Wireless Experimenter". > > EIFEB ex GI8JTR ->Ok, you guys sold me. I'm going to get a radio amateur's license. "Get an amateur license", "Get a Spectrum Analyser"... Give me a break! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist