I use a manual 2 x 1 coax switch to switch between 2 radios to one amp input. As to VOX it is always off unless I turn it on. I usually only use one radio at a time.
Bob, K4TAX Sent from my iPhone > On Nov 6, 2018, at 9:09 AM, Don Wilhelm <donw...@embarqmail.com> wrote: > > Bob, > > That is a simple solution, but how do you handle the RF output of both > transceiver to the single RF in on the amplifier? > > The only caution I can give of with a configuration like that is for the > operator who uses voice modes with VOX turned on. > Most ham mics are wired for VOX operation - in other words, the mics are > 'live'. For those who use speakers too, the mic on the 'not in use' can pick > up the sound from the 'live' transceiver speaker and set it in transmit mode. > > The use of headphones will likely cause no problems, but the combination of > VOX ON with speakers live can cause a problem for voice modes. > > My preference is for hard switching to eliminate a lot of "strange > happenings" - besides, I like to feel I am in control of such things. > Such a switching arrangement can be easily built, but there are several SO2R > boxes that will accomplish the same thing. > > 73, > Don W3FPR > >> On 11/5/2018 3:30 PM, Bob McGraw K4TAX wrote: >> I basically do the same with different radios. The K3S is connected to the >> KAT500 and then through the KPAK3AUX cable to the KPA500. The other radio >> has a Amp Key output basically an open collector to ground which I connect >> to the PA Key input. Either radio will key the KPA500 and no switching or >> changes required. Just cables and connectors. Adding the KAT500 requires a >> second KPAK3AUX cable and slightly different wiring configuration. However, >> with either radio, no other changes required. Just be sure you have the >> correct drive power set and TUNE power set for each radio before hitting the >> PTT switch. >> All this is very easy to accomplish with the cables and connectors provided >> by Elecraft. The worst part is that hams "over think" the solution. >> 73 >> Bob, K4TAX >>> On 11/3/2018 1:21 PM, Ralph S. Turk wrote: >>> Hi all >>> >>> I need to be able to key the KPA500 & KAT500 from both a Yaesu 1000mp and >>> my K3. >>> >>> I assume (I know don't assume) I can use diodes to isolate both radios. >>> >>> Any thoughts? >>> >>> Ralph, W7HSG/AFA9RT >>> ______________________________________________________________ >>> 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 rmcg...@blomand.net >>> >> ______________________________________________________________ >> 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 donw...@embarqmail.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
