[Elecraft] New KX3 reverse voltage smoke

[Ian Liston-Smith]

Well I did it. Inadvertently got the +ve and -ve reversed. Loud buzz from PSU and smoke from KX3.

Surely D6 in the volts input should just stop everything from working if the polarity is reversed? So I don't understand what has happened.

I didn't actually switch it on so hopefully it isn't terminal and just enquires a new diode. If it is terminal, I'm really surprised it hasn't any protection.

Ian, G4JQT😒😭