There's just been a thread on this on the Elecraft-K3 group on groups.io. First recommendation was to check the connection from your power supply including power pole connection. Should have direct connection to the power supply.
More likely is a problem with the connection path from KPA3 to KPAIO3 to RF Board. Depending on the S/N, there might be tin connections that corrode. The fix is to replace with gold pin connections. I had this problem on my older K3 (S/N 1428) -- symptom was I couldn't raise power level above 12W. Replacing pins wasn't hard. I think Elecraft changed out these connectors after S/Ns in the mid 3000's.
Good luck,
Gerry, W1GD
On Saturday, June 29, 2024 at 07:36:19 PM EDT, KI4KWR - Steve Molo <[email protected]> wrote:
Good Evening All,
I am getting the ERR 12V as soon as I power my K3, what broke?
Steve Molo KI4KWR President Huntsville Amateur Radio Club® Madison, AL 35756 Email: [email protected] Phone: 609-489-1878