The KPA500 can be controlled by a serial port, but not the same serial port at the same time that is used to control your K3 or K3/P3 combination. You don't "daisy chain" the amp from the K3's serial port.
One way to turn the KPA500 on and off "remotely" is to use a serial port and a computer program. The KPA Utility can do this. Additionally, there is a "power on" pin on the KPA500's 15-pin ACC connector. If you can arrange to bring that line low, the KPA500 can be powered up. The K3 has a similar function on its ACC connector for powering on with an external relay closure. K6XX wrote up his technique to get the K3 to bring the KPA500 POWER line low by manipulating the K3 DIGOUT1 line. That is on the K3's 15-pin ACC connector. The 15-pin "thru" cable we sell for the K3 to KPA500 does not connect K3 DIGOUT1 to KPA500 power on. Bob ran a separate wire for that. Bob wrote up his technique in this post: http://elecraft.365791.n2.nabble.com/macro-to-control-KPA500-td7240517.html# a7243817 It is a wire between the K3 and KPA500. It is not the RS-232 serial port. And the same DIGOUT1 is used to switch the PR-6. Bob mentions that in his post. 73 de Dick, K6KR -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Sent: Wednesday, July 17, 2013 18:28 PM To: [email protected] Cc: Elecraft Subject: Re: [Elecraft] Help with a Macro from the K3 to turn on the KAP500 Don, Don't quite follow here... Are you agreeing or not? My understanding without actually looking up the acc cable is that only band data, and standby operate status is exchanged. Is this not the case? At one point I called elecraft about this specifically and they told me you need the dedicated serial port for the kpa to control it. Tom va2fsq.com Sent from my iPhone On 2013-07-17, at 5:34 PM, Don Wilhelm <[email protected]> wrote: > Tom, > > Think about it a bit. The K3 ACC cable connects to the KPA500 for the band data only. So how could any form of a command be passed over the band data lines? > > 73, > Don W3FPR > > On 7/17/2013 5:29 PM, Tom wrote: >> Ok could be undocumented. >> Lets hope Wayne chimes in. >> >> Tom >> va2fsq.com >> >> Sent from my iPhone >> >> On 2013-07-17, at 5:25 PM, William Levy <[email protected]> wrote: >> >>> Not what Wayne says. >>> >>> On Jul 17, 2013, at 3:24 PM, Tom <[email protected]> wrote: >>> >>>> Hi >>>> Yes they talk to each other but only send band change info and >>>> certain other statuses. To do this with only a macro and no >>>> possible hardware is not possible >>>> >>>> Tom >>>> va2fsq.com >>>> >>>> Sent from my iPhone >>>> >>>> On 2013-07-17, at 5:06 PM, William Levy <[email protected]> wrote: >>>> >>>>> Yes, but they are connected directly in the back of the K3 with one of the AUX cables so they feed each other that way. >>>>> Thus the K3, Amp and ATU all talk to each other. >>>>> Thus the need to be able from the K3 to turn on the Amp. >>>>> Bill N2WL >>>>> >>>>> >>>>> On Jul 17, 2013, at 1:02 PM, Tom wrote: >>>>> >>>>>> Hi >>>>>> That would be news to me, since the k3 and kpa use different serial ports. >>>>>> Tom >>>>>> va1fsq.com >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>> On 2013-07-17, at 2:24 PM, William Levy <[email protected]> wrote: >>>>>> >>>>>>> Somewhere I thought there was written a short macro to designate >>>>>>> a button on the K3 to turn on the Amp from the K3. >>>>>>> >>>>>>> Any help with that would be greatly appreciated. This old ham >>>>>>> has his fist in to too many old radios at the moment to sit down and figure out code. >>>>>>> Too busy reading resistor codes. All help appreciated. Thanks, >>>>>>> Bill N2WL >>>>>>> ______________________________________________________________ >>>>>>> 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 >>>> Sent from my iPhone >>>> >>>> On 2013-07-17, at 5:06 PM, William Levy <[email protected]> wrote: >>>> >>>>> Yes, but they are connected directly in the back of the K3 with one of the AUX cables so they feed each other that way. >>>>> Thus the K3, Amp and ATU all talk to each other. >>>>> Thus the need to be able from the K3 to turn on the Amp. >>>>> Bill N2WL >>>>> >>>>> >>>>> On Jul 17, 2013, at 1:02 PM, Tom wrote: >>>>> >>>>>> Hi >>>>>> That would be news to me, since the k3 and kpa use different serial ports. >>>>>> Tom >>>>>> va1fsq.com >>>>>> >>>>>> Sent from my iPhone >>>>>> >>>>>> On 2013-07-17, at 2:24 PM, William Levy <[email protected]> wrote: >>>>>> >>>>>>> Somewhere I thought there was written a short macro to designate >>>>>>> a button on the K3 to turn on the Amp from the K3. >>>>>>> >>>>>>> Any help with that would be greatly appreciated. This old ham >>>>>>> has his fist in to too many old radios at the moment to sit down and figure out code. >>>>>>> Too busy reading resistor codes. All help appreciated. Thanks, >>>>>>> Bill N2WL >>>>>>> ______________________________________________________________ >>>>>>> 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 >> ______________________________________________________________ >> 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 > ______________________________________________________________ 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 ______________________________________________________________ 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
