[Elecraft] K2 PA Failure

[Georges Ringotte F6DFZ]

Hi to the group,

When I had my K2/10, I had multiple failures of the PA transistors.
Close investigation showed that the problem came from my switching power 
supply (a professional 5A one from Friwo).
When switching on the K2, the power supply emited large spikes that 
destroyed the PA transistors.
If the K2 was first switched on its internal battery, and then the power 
supply was switch on, no problem as the capacitors of the K2 were already 
charged.

Before restauring your K2, check your power supply with a scope at switch 
on.

Best regards.

Georges F6DFZ