Ouch, sorry to hear that.
If you are lucky it may have only blew a cap or possibly belted a trace.
I would open it up and look at the PA deck to look for obvious damage.
As far as future prevention, label clearly and double check.One thing I do not
like on the K3 (and mosst radios that use Power-poles) is that the Power-poles
are not recessed, it makes it way to easy to put them in to the side.
I build distribution boxes and the Power Poles are slightly recessed to prevent
this.
I have a part I machined that will surround the power-pole and prevent this, I
just need to install-it on My K3 next time I have it apart.
From: roger wood <roger.w...@ieee.org>
To: Elecraft <elecraft@mailman.qth.net>
Sent: Sunday, September 13, 2015 1:24 PM
Subject: [Elecraft] K3: reverse 12 volt supply
I managed to connect a 12 volt car battery backwards to the K3.
There was a lot of smoke and the breaker popped. The RX and TX appear to
have survived, however the internal 100 Watt amplifier now shows an
over-current fault and quickly switches off. I haven't dared open it up
yet - far too depressed now. I'll leave it till next weekend.
Any comments on what I might expect to find inside and how to idiot-proof
it for my future operation?
73
Roger
KK3RW / G3WEW
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