[Elecraft] K2 C111 installed backwards

[Craig Rairdin]

I'll get it fixed before transmitting again. I have lots of hours of
transmit time including some intense contest periods and no explosions yet
but I'll get it replaced.

Craig

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at earthlink.net] 
Sent: Saturday, February 04, 2006 4:24 PM
To: Craig Rairdin; elecraft at mailman.qth.net
Subject: RE: [Elecraft] K2 C111 installed backwards


Craig,

C111 is an electrolytic capacitor, and if subjected to reverse voltage it
can overheat and rupture.  Since it only has voltage on it during transmit
periods, it may take some time, but yes, change it before it explodes on
you.
True the 8T signal is not used for any of the options, but it IS used
internally in the K2, so it does have voltage on it (only during transmit,
but still ...).

73,
Don W3FPR

> -----Original Message-----
>
> One of the problems with putting pictures of your K2 out on the
> Web is that
> everybody gets a shot at finding your mistakes.
>
> Roger, OE6MSF, points out that it appears that I may have
> installed C111 on
> the RF board backwards. C111 looks like a filter cap between line 8T and
> ground. Since 8T isn't used for any Elecraft options, I suspect I may have
> accidentally picked the right cap to install backwards.
>
> Any opinions to the contrary? I'm eventually going to open this
> thing up and
> install some more options so I'll eventually fix it. Any reason to panic
> about this and fix it now?
>
>