Please see comments below: -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop Sent: Friday, November 09, 2012 4:26 AM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 USB request
On 11/9/2012 04:55, David G4DMP wrote: >> In a recent message, Gary Smith <g...@ka1j.com>> writes >>>> I would love for there to be a USB >>>> connection for the K3 without the serial to USB adapter. >> >> It would put the cost up, Gary. I understand that USB is like Dolby >> in that it is a proprietary protocol for which equipment designers >> would have to pay a premium. There is nothing proprietary about USB at all. It is a standard, not a protocol. >>This expense would consequently be passed to the >> customer. RS232 or its 9-pin equivalent is so much simpler. >> >> 73 de David G4DMP >> >And should the desired "USB" be USB2 OR USB3? USB3 is supposed to be backwards compatible. However, USB port specs >are apparently not frozen in design. I don't know what other meaning you give the word 'specification'. You either met the spec or you can not use the USB logo. Granted there some parts of the spec, like backward compatibility, that are 'musts' and other parts, like sourcing power, which are 'mays'. I think you miss some very import points. USB is a very general purpose computer bus with hundreds of thousands of applications. Why would you want to get burdened by compatibility issues when what you really want is an interface? MORE IMPORTANTLY, if you replace RS232 with either an interface or USB, you break the code of every ham radio program out there that uses an RS232 interface. That is not a trivial matter. It's still a shovel with a rope handle. 73 Fred, AE6QL >Also note that the USB3 specs seem to imply that USB3 should be able to supply 1.5A (sometimes 6). Thus the K3 would >most likely be required to supply this additional power. More cost and complexity. Plus the DC supply to the K3 would most >likely have to be upgraded to provide this extra current. 73 de Brian/K3KO ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5384 - Release Date: 11/09/12 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
