[Elecraft] New KX3 reverse voltage smoke

[David Haines]

Don't feel bad Ian.  I reversed the polarity from the power supply, too. 
   After the smoke cleared and the smell went away, I called Elecraft 
and after a few questions, service said send in my KX3. They called in a 
couple days to thank me for sending the melted wire, but why did I send 
the KX3, which was fine?   They apologized, checked out the KX3,  and 
gave me a free replacement wire.  Great company!

david,  KC1DNY

On 9/5/2020 10:06 AM, Ian Liston-Smith wrote:
> 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😒😭
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to dhaines at bates.edu