[Elecraft] K2 rear panel 12VDC hole size?

Sun Feb 17 08:06:00 2002

I had a couple of large heavy-duty wall warts I wanted to try out on my K1
#955, and their plug polarity and size *looked* to be the same as the
standard plug that came with the K1 kit. This seemed to work fine, but I was
puzzled by occasional surprise reboots. Turned out the wall wart plug's
center conductor hole was just a teeny bit oversize, causing a slightly
loose fit with the pin on the chassis connector. After I installed the real
thing to get an exact fit, haven't had problems since. So if you are not
using the original kit plug, be wary of the fit. The outer (-) shell is no
problem, since it has a spring-loaded contact. But the inner pin is a slip
fit, and the fit must be exact to prevent intermittent contact. Like most, I
have a drawer full of these little plugs, and it's amazing how many
different sizes there are. Industry standardization is nonexistent in this
area.
73, Jerry W5KP

----- Original Message -----
From: "Ron D' Eau Claire" <[email protected]>
To: "Dave Benham" <[email protected]>; <[email protected]>
Sent: Sunday, February 17, 2002 12:10 AM
Subject: RE: [Elecraft] K2 rear panel 12VDC hole size?

> > My hole is
> > 9mm or about .354".
> >
> > Could someone out there tell me what the current hole size is?  I may
have
> > to ream mine out during the repair process.  Thanks.
>
> > Dave  K8TRF
>
> Dave, the hole on S/N 1289 is 11 mm in diameter.
>
> It seems to me that there was also some discussion in the past about power
> plugs that were close, but not exactly the right size, causing
intermittent
> problems. I'm sorry, but I can't recall the details.
>