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

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