[Elecraft] Dreaded ERR 12V Message

[Gerry Kersus via Elecraft]

 No, these were the stock screws.  I'm surprised they stuck like they did.  None of the other black screws have  had a problem and the radio has certainly have never been in a high humidity environment.  I will used the "little" bit of lubricant when I replace them.


73,
Gerry, D1GD



-----Original Message-----
From: Don Wilhelm <don at w3fpr.com>
To: w1gd <w1gd at aol.com>; elecraft <elecraft at mailman.qth.net>
Sent: Sun, May 10, 2015 5:39 pm
Subject: Re: [Elecraft] Dreaded ERR 12V Message


Gerry,

I am glad it has worked well for you.

Did you install stainless
steel screws in the past?  That may be one 
reason for the galling.  Steel into
aluminum is not usually a problem, 
but it can be at times - it is worse with
stainless steel than with 
regular steel screws.  The black screws are supposed
to have a bit of a 
lubricating coating, but it does no harm to give it a
little bit more 
lubrication - and I do mean a *little* bit - add a drop to the
screw 
threads and blot the excess off with a paper towel, that is all it
takes.
When you replace the 2D connectors and the screws, us a tiny drop of oil

on the threads - remember, you do not want any runoff.

73,
Don
W3FPR


On 5/10/2015 4:37 PM, Gerry Kersus via Elecraft wrote:
> Don,
>
This is to provide closure to my problem:
>
>
> I did locate the new
connectors. After dis-assembly of the K3, I found that the 6 pins on P67B on the
K3 Main board were discolored.  I replaced the 6 pins as well as the mating 13x2
connector J67B on the KPAIO3 board. Even under magnification, I could not see
any discoloration on the P68B connector.  So, I just replaced the 6 pins with
the new gold pin connection and not the J68B.
>
>
> After 48 hours, including
about 100 contacts in the CQ M contest, everything seems to be normal.
>
>
>
I did encounter an problem during dis-assembly:  When trying to remove the two
4-40 pan head screws holding the rear panel to the bottom 2D fasteners, neither
screw would budge.  (There were no problems with any other screws).  I even
tried my reliable screw extractor, but that didn't work either -- it's like the
screws had galled.  I re-assembled the K3 without those two screws, but I will
need to order two new 2D connectors and 4-40 pan head screws.
>
>