[Elecraft] Sudden K3 problem

[Joe Subich, W4TV]

That is textbook for burned pins on the KPAIO3 board - particularly
if it has never been upgraded to the gold pins. Pull the fan panel
and take a look.

73,

    ... Joe, W4TV

On 2025-01-29 9:11 AM, James Beitchman wrote:
> While tuning the K3/100 (S/N 1551 plus upgrades) and antenna coupler
> (external) with the SWR 1:1 and the output power at about 75W, suddenly
> there was a click from the K3 and the error message displayed: ERR 12V, This
> now occurs when the power is increased from zero to about 10W.  At that
> point, the problem occurs, and the power cannot be increased above 10W. The
> power supply voltage is constant at 13.8VDC and does not glitch when the
> error occurs. Thoughts?  Would appreciate help.
> 
>   
> 
> 73,
> 
>   
> 
> Buzz
> 
> W3EMD
> 
> 
>