All you need are diodes to isolate the keyout lines going to the amplifiers. Just turn off the amp you aren't using. You can use a simple transistor switch operated by DIGOUT1 to increase the current it can provide. I would like to see Elecraft add the ability to control all the DIGOUT lines via macro to provide more station control functionality.
Vic 4X6GP/K2VCO > On Aug 16, 2015, at 5:09 AM, Michael Eberle <[email protected]> wrote: > > Hi Mike, > > I'm not sure if the Key Out and key line on the Aux port are isolated or not. > At one time I had the KPA500, a tube amp, and a 2M amp for the internal > transverter all connected. I used a KRC2 band decoder connected to a couple > of relays that would switch the Key Out signal among the three depending on > what band I am on. It requires some extra cabling because it needs to also > needs to connect to the AUX port as well as the KPA500/KAT500. > > With only 2 amps, you may be able to use a relay to switch the Key Out signal > controlled by the DIGOUT 1 pin on the Aux connector. You would have to set > DIGOUT 1 in the K3 config menu to 'OFF' on every band except for 6M where it > would be set to ON. You would have to make sure to use a relay small enough > that it doesn't pull more current than the DIGOUT 1 pin can handle though. > > 73 > Mike - KI0HA > >> On 8/15/2015 5:20 PM, Mike VE3YF wrote: >> Hi: >> >> I would like to know if it is possible to hook up the KPA500 to the Antenna >> Port 2, use the KPAK3AUX cable and splitter cable from the K3 to KPA500, >> and then other half of the splitter cable to the MK2R+. When in normal use >> the I would use Antenna Port #1, and when I want to work 6m or the KPA500 >> amp use Antenna Port #2. >> >> I guess a question comes to mind, is the key out jack isolated from the >> keying line on the KPAK3AUX cable. I see that is being the major issue, but >> I am >> sure I am not the first one to think of this possible setup. I welcome any >> comments etc. Tnx >> >> >> 73 De Mike >> VE3YF > > ______________________________________________________________ > 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]
