It seems to me that using a DB-9 connector for non-RS232 uses is taking the Easy way out. There are numerous other connectors that could be used to alleviate any Misunderstanding.
Not everyone goes through manuals with a fine tooth comb to locate the "gotchas". 73, Dick, W1KSZ -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Saturday, August 22, 2015 4:25 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 - KPA100 RS232 interface repair Hi Floyd, I've owned and operated a pair of K2s, both of which I bought used. Elecraft makes it very clear that the DB9 connector on the K2 is NOT an RS232 interface, that it is not RS232 compliant, and that a standard RS232 cable should NOT be used. Rather, the DB9 connector provides both serial control AND several control functions. The DB9 connector is a generic part, and can be used for many things besides RS232. It is also well known that while the RS232 Standard defines voltage levels, MANY modern products produce far less than those levels. I've owned a lot of gear in my lifetime, and the first thing I do is open the manual, study it, study the wiring of the various connectors, study the specs, and study the operating instructions. 73, Jim K9YC On Sat,8/22/2015 1:28 PM, Floyd Sense wrote: > Hi Don. I'm sure you're aware that the RS232 spec includes the > description of voltage levels, and if you're going to refer to an > interface as RS232 (as Elecraft does in many places) then you're > implying that the normal RS232 signal levels will be used. A user > shouldn't be required to read a one hundred page manual before > plugging in a connector when every other such connector works in the > conventional way. Having been a designer using RS232 interfaces 45 > years ago, I would have been executed had I designed something like this. ______________________________________________________________ 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 Message delivered to w1...@earthlink.net ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com