[Elecraft] K3 KPA100 not putting out in high power

[Dave New, N8SBE]

I had the same issue with my K3 a few years ago.  If yours is an early 
serial number, it may not have gold-plated pins on the KPA100 connector 
to the main board. Elecraft will supply the updated connectors for you, 
if you feel you can tackle the upgrade yourself.  The tin-plate 
connectors after a while present a higher resistance connection.

I updated my K3 and never had that issue after that.

73,

-- Dave, N8SBE

On 2023-03-16 13:59, Jim Cary wrote:
> My K3 has stopped working in high power.  It works fine until output
> hits 12 watts.  I hear the relay kicking in at that point to switch
> the K3 PA bypass relay to the  KPA100 module, but power goes to 0 and
> swr fluctuates all over the place.  The amp breaker does not appear to
> have been tripped.
> 
> Does anyone have a suggestion?
> 
> Jim
> W2SM
> 
> 
> 
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