On Fri, Oct 16, 2009 at 11:21 AM, Joe Subich, W4TV-4 (via Nabble) ml-user+154617-66613...@n2.nabble.comml-user%2b154617-66613788@n2.nabble.com wrote: "SO2R-in-a-box" will probably require that the subreceiver use the 2nd antenna jack on the KAT3 (or a yet to be designed antenna switch) in order to be compatible with conventional BPF, antenna switching and amplifier configurations. In that case it will be limited by the isolation in the KAT3. The alternative is to use the subreceiver and Aux Ant jack with AB logic for transmitting. That case will require an entirely new band decoding/BPF/antenna switching topology - one that supports TX/RX/RX switching (which happens to be on of the features of microHAM Station Master Deluxe whenever it is finally available) and an understanding that the transmit "radio" will always be in the left ear (e.g. will move with transmit focus). JMHO but I believe true SO2R should wait until there's more real estate on a larger K4 front panel, even if the internal RF issues can be solved in the K3. The K3 already suffers from ergonomic overload and lack of flexibility with antenna selection, audio routing, etc. even when just using diversity in SO1R. True SO2R adds another level of complexity to an already overloaded interface. Given this, I believe there are higher priorities to work on with the K3 and save SO2R for a better human interface in the K4. 73, Bill W4ZV -- Just to way in on this one. I totally agree with Bill. SO2R should be a generation away. Howard..K2HK ______________________________________________________________ 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