As far as I know, the transceivers have Auxbus (K2, K3, K4, but not K1). Not sure if the KX transceivers bring it out to a connector, though. The KPA500 sends data out to the transceiver using Auxbus, but does not listen, the KAT500 only receives data. The KPA1500 does both.
I believe you are using the TXBPF filters, Jim (as am I). They need low-drive individual band signals, although they also can use the K3’s BAND outputs. I hope this answers the question… 73, Jack, W6FB > On Sep 2, 2023, at 1:07 AM, Jim Brown <j...@audiosystemsgroup.com> wrote: > > On 9/1/2023 7:21 PM, Michael Carter wrote: >> One clarification on the AUXBUS signal: the >> 'auxbus' is Elecraft's proprietary 1-wire >> signaling scheme by which the main MCU >> on the K2 Control board talks to all of the >> other controller ICs on the various option >> modules and the I/O controller (relay driver, >> among other functions) on the K2 RF board. >> The 'auxbus' signal is made available via the >> KIO2 interface, if installed, for use with >> external Elecraft modules (e.g. the KAT100 >> ATU, KPA100 PA, and the transverter modules). > > One caution -- I was told by someone at Elecraft years ago that not all later > products implement it. I think I remember KAT500 and/or KPA500. I'm using > Auxbus from K3s KRC2s to generate band data to switch bandpass filters. Very > nice - a single coax from K3 to KRC2. I don't remember what format the > filters wanted. That was W6FB's project, I think. > > 73, Jim K9YC > > > ______________________________________________________________ > 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 jackbrin...@me.com ______________________________________________________________ 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
