I am not certain if you are directing the question to me or the original poster so I will offer a response! The SDR projects are available for the US Amateur Radio Service in each of the HF bands. An "Amateur" license (not difficult, don't flinch) is required to transmit but not to receive. The hard work in the receiver is done in the software which I hope to someday comprehend. The electronics for the receive portion are extremely simple and inexpensive. The performance is State-of- the-Art in spite of the low cost. This is NOT a USA only project, it is international endeavor with the software and math mostly provided by amateurs outside the US. Ham Radio works that way a lot. The receive technology seems to require a super stable (crystal) oscillator at 4X the receive frequency so that tends to put an upper limit on the technique being utilized above 28mhz in Amateur Service. If this discussion is to continue, should it move to OT? John Ferrell W8CCW "Life is easier if you learn to plow around the stumps" http://DixieNC.US ----- Original Message ----- From: "Rich" To: "Microcontroller discussion list - Public." Sent: Saturday, January 12, 2008 10:46 PM Subject: Re: [EE] CW transmitter kit or design >I probably missed some comments but what kind of input power and frequency > are you considering? > > ----- Original Message ----- > From: "John Ferrell" > To: "Microcontroller discussion list - Public." > Sent: Saturday, January 12, 2008 4:54 PM > Subject: Re: [EE] CW transmitter kit or design > > >> Not exactly what you are looking for but >> http://groups.yahoo.com/group/softrock40/ >> is dedicated to Software Defined Radio. >> The collection of transceivers here work in conjunction with your PC >> soundcard to provide a complete rig at very low cost and very high >> performance. Receiver only in the neighborhood of $10, transceiver in the >> $30 range for kits. >> >> Otherwise Google QRP transmitter. >> >> John Ferrell W8CCW >> "Life is easier if you learn to plow >> around the stumps" >> http://DixieNC.US >> >> ----- Original Message ----- >> From: "Joshua Shriver" >> To: "Microcontroller discussion list - Public." >> Sent: Friday, January 11, 2008 6:13 PM >> Subject: [EE] CW transmitter kit or design >> >> >>> Good evening, >>> >>> For those hams on the list, anyone recommend a kit for making >>> a small 5watt CW transmitter with key? I've looked online and have >>> found a couple "kits" you piece together, but it would be fun to build >>> it from scratch. However either is nice. >>> >>> -Josh >>> -- >>> http://www.piclist.com PIC/SX FAQ & list archive >>> View/change your membership options at >>> http://mailman.mit.edu/mailman/listinfo/piclist >>> >> >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist