[Elecraft] Dreaded ERR 12V Message

[Don Wilhelm]

Gerry,

There are several reasons for ERR 12V - look in the manual Error chart 
for possible activities.
There is another possibility that is not in the manual.  See 
http://www.elecraft.com/manual/KPA3%20Power%20Connector%20Replacement.pdf

I am curious why you said "other than replacing the KPA3 power 
connector" - unless you have already made that change.

On earlier K3s, gold pins were not initially used for the 12v power pins 
to the KPA3.  In some cases, the tinned pins were not sufficient to 
carry the required current.
Elecraft does offer a KPA3CONMDKT to allow you to change those pins to 
gold plated types.  You may order that kit from parts at elecraft.com.  I 
recall they are being provided at no cost.

The kit is not difficult to install, but it does require removing the 
rear panel from the K3 to gain access and you can expect to spend some 
time removing screws.

73,
Don W3FPR

On 5/3/2015 3:34 PM, Gerry Kersus via Elecraft wrote:
> While operating 20CW with about 100 watts, my K3 (S/N 1428) suddenly displayed the dreaded ERR 12V  message. The circuit breaker did not trip. I was not able to operate even at low power until I powered off and then back on. I was able to operate again, but it would intermittently display the message again. I was able to operate fine with 10 watts (after powering off/on) This happened on other bands and on SSB.  I noticed that as I turned the power level clockwise  while listening that the background noise noticeable dropped with the power level went over 12 watts. I also occasionally got the message even while not transmitting.
>
>
> Any other advice (besides replacing the KPA3 power connector)?
> Thanks,
> Gerry, W1GD
>