[Elecraft] Older K3/100s can be updated to avoid possible "ERR12V" problem

[nr4c]

That's odd, as yours is newer than mine, and I'm pretty sure mine has 
gold plated pins on all connectors.  And, my K3 was delivered Aug3, 
2010.  Well after the 2009 date.

...bill  nr4c


On Tue, 14 Feb 2012 14:37:36 -0200, Adriano Perazio wrote:
> Mine is s/n 4795 and showed this problem last week. After turn off it
> disapeared. So must be it.
>
> PY2ADR
>
> -----Mensagem Original-----
> From: Jack Berry
> Sent: Tuesday, February 14, 2012 2:20 PM
> To: Wayne Burdick ; Elecraft Reflector
> Cc: elecraft_k3 at yahoogroups.com
> Subject: Re: [Elecraft] Older K3/100s can be updated to avoid 
> possible
> "ERR12V" problem
>
> Wayne,
> Define "older K3" please. Can you let us know when you started 
> shipping K3's
> with gold contacts; date or S/N?
>
> Thanks!
> Jack - WE5ST
>
>
>
>
> ________________________________
> From: Wayne Burdick <n6kr at elecraft.com>
> To: Elecraft Reflector <elecraft at mailman.qth.net>
> Cc: elecraft_k3 at yahoogroups.com
> Sent: Tue, February 14, 2012 9:53:28 AM
> Subject: [Elecraft] Older K3/100s can be updated to avoid possible 
> "ERR 12V"
> problem
>
> Early K3s had tin plating on the connectors that supply 12 V DC to 
> the
> KPAIO3 and KPA3 modules. We discovered that in some climates the tin
> plating can eventually corrode, reducing voltage to the PA module,
> especially when operated at high duty cycle. This can result in an
> "ERR 12V" warning ("check circuit breaker") and the amplifier going
> into bypass mode. Power output drops to 12 watts max in this case. In
> some cases the power is temporarily restored after turning the K3 off
> and back on.
>
> The cure is to replace the tin-plated contacts with new ones which
> have gold plating. It's fairly easy to replace just the pins 
> involved.
> I believe we've been shipping the gold-plated connectors since
> sometime in 2009.
>
> If you have an older K3/100 and you're planning to use their K3 in
> high humidity or salt air, or if you've seen the warning message, you
> should replace these connectors. They will be supplied free of charge
> on request (email "parts at elecraft dot com").
>
> If you further questions on this topic, please email k3support.
>
> 73,
> Wayne
> N6KR



>
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