Wes; We do realize the situation as far as Auxbus is concerned with an unpowered KAT500. I believe that Wayne has stated that he has an active task to allow the K3 to detect the situation and recover from it. I don’t know the time frame of this fix. I’ll let him comment further when he gets a chance.
Jack B, W6FB > > On Oct 4, 2014, at 10:27 PM, Wes (N7WS) <[email protected]> wrote: > > Jack, > > Thanks for your remarks. > > I will be using AUX Bus interconnects, however, the KPA500 has yet to be > assembled and frankly the Elecraft cables are too spendy so they are coming > from elsewhere. > > I don't use a P3 (an SDR-IQ is my preference) so the 12V spigot is available. > However, using that port to power a relay is going in the wrong direction for > me. I'd like to reduce the mess of cables and needing one more from the > desktop to the supply underneath was what I wanted to avoid. I've just had to > add a Rigrunner to power more devices in my "wireless" station. > > 'Tis a pity that the KAT500 can't treat the bus like the KRC-2 and KPA500. > > Wes N7WS > > > On 10/4/2014 7:20 PM, Jack Brindle wrote: >> Godo questions. The power sequencing key is that the KAT500 must be powered >> before the K3 initializes the Auxbus. You actually have a little bit of time >> after the K3 powers on before this happens, and the KAT500 powers up quickly >> to wait for this activity, so if you were able to power the KAT500 from the >> K3’s power jack, it will work just fine. I do this in my own station by >> powering a relay from the K3. The relay then switches power to the remaining >> peripherals, including my KAT500, K3 and KRC2. I can’t answer the question >> as to whether the upgraded K3 can directly power a KAT500 - my own has not >> been upgraded and with the power setup I have I don’t need it. >> >> As for the KRC2, we have not seen any problem of this sort so far (and it >> has been a long time…). The KRC2’s Auxbus circuitry is slightly different >> from the KAT500, which seems to allow it. Before anyone asks, the KPA500 >> does not have this problem at all. It only transmits on the Auxbus, and the >> isolation driver transistor it uses very effectively prevents any problem. >> >> As for the interconnect, I highly recommend using the Auxbus connection, >> especially if a KPA500 is in use. When properly configured, the three >> devices work very well together to provide an excellent user experience. To >> borrow a phrase, they just work. >> >> 73! >> >> Jack B, W6FB >> >> > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
