Pete, I am not certain why you believe the K3 RS-232 port to be "fragile". I have not seen a large number of failures identified on this reflector. There have been quite a number of users who have had problems with USB to RS-232 adapters, but that is not a failure of the K3 RS-232 port.
Can you give me some examples of RS-232 port failures on the K3? 73, Don W3FPR Pete Smith wrote: > I've been thinking about how one might go about adding some protection > for the apparently fragile (and expensive) RS-232 port on the K3. It > might be possible, if the components were small enough, to add them on > the KIO3 I/O daughterboard, or perhaps on a little external board > mounted at the port. > > But the question is, what components? I have seen small gas tube units, > but suspect that by the time the potential reaches 90 volts or so and > the tube flashes over, the RS-232 transceiver is probably toast anyway. > Would it be feasible to use fast diodes to shunt the data lines to > ground at .7 volts or so, or would that introduce other problems (stray > capacitance, etc.)? Anything else that might make sense? > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
