Correct ... more complete than my parallel reply. Ed - W0YK Iain, N6ML, wrote: > See the K3 firmware release notes: > > http://www.elecraft.com/K3/k3_software.htm > > You need to have version 4.36, the accessory cable in place > between the K3 and KPA-500, and "CONFIG:PWR SET" = "PEr bAnd".