[Elecraft] K3 Firmware Download Problems. Hopefully solved.

[Bob Cunnings]

Could be a ground loop problem. At the factory we have had trouble
with ground loops upsetting RS232 communication between the device
under test and the test controller PC... and are careful about our AC
mains power arrangements. We try to keep all AC power cords for test
gear, PC, etc. on the station plugged into a common power strip.
Sometimes optical isolation of RS232 paths is needed for really
complicated configurations, where RS232 and USB paths exist both
between the controller PC and the test fixture (which has embedded
microcontroller) and between the test fixture and the DUT.

Bob NW8L

On Mon, May 5, 2008 at 9:18 AM, David Yarnes <w7aqk at cox.net> wrote:
> Gads!  I never would have thought of trying that!  I can't wait for someone
> to give a logical explanation of what the problem could have been.  I'm
> afraid all that tells me is that the wall socket you were using initially
> may have a problem.  Have you checked it?
>
>  Dave W7AQK
>
>  ----- Original Message ----- From: "Mike" <mhutchins at clear.net.nz>
>  To: <elecraft at mailman.qth.net>
>  Sent: Sunday, May 04, 2008 6:22 PM
>  Subject: [Elecraft] K3 Firmware Download Problems. Hopefully solved.
>
>
>
> > Some readers may recall my ongoing problems loading new firmware to K3
> #0215.
> >
> > I *may* have solved this problem.........During problems with the
> 01.78/01.58 download, I changed the physical config of my K3 & PC.  - They
> had been plugged into 2 different wall sockets in the shack. I moved the Ks
> & its power supply into the same socket as my PC & the 01.78/01.58 download
> then worked well.   Yesterday I downloaded 01.87/01.69, using this same
> config, & all went well.
> >
> > It may not be a cure-all for everyone's problems, but could be classed as
> 'one more thing to check' & has been reported to K3Support.
> >
> > 73 de Mike, zl1mh.
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