[Elecraft] Monitor (OT)

[Steve Sacco]

I had a Samsung SyncMaster 24" which was very susceptible to RFI on
80M.  It would turn off whenever I transmitted.  The antenna is an
inverted Vee, less than 1 wavelength from the monitor.  I was able to
stop this problem by wrapping 6 turns of the AC power cable around a
big clamp on ferrite.  (Thank you Jim, K9YC, AGAIN for your work on
this topic!)

Coincidentally, around the same time, the "rfi" mailing list hosted by
eHam/contesting.com discussed a related issue.  Search for "TV turns
on-off when TX" at http://lists.contesting.com/pipermail/rfi/.

My Samsung failed last month, and I chose to replace it with a Dell
U2412M, which does not have the capacitive-touch switches.  I left the
common mode chokes in place, and it's been fine.

FWIW.

73,
Steve
NN4X



On Fri, Feb 10, 2012 at 7:23 PM, David Christ <radioham at mchsi.com> wrote:
> I have received enough replies to report the trend.  With one
> exception no problems were reported.  The list of brands was most of
> the mid to major names such as Dell, LG, HP, Acer, ViewSonic, Planar,
> ASUS.
>
> The exceptions were Samsung.  Not all Samsung monitors were reported
> as problematic.  Many were OK.  An older one had display problems
> when the user was on 80.  This may or may not have been the result of
> RF in the shack.  No way to tell.  It seems the one to avoid is
> Samsung models with soft of virtual buttons.  These could be
> activated during transmission.  Units with real buttons seemed to be
> OK.
>
> There are some mystery brands out there that were not mentioned so no
> conclusion for them can be drawn.
>
> Bottom line: It appears that if you stick with recognized brands and
> avoid trick things like soft buttons you should be OK.  However there
> are no guarantees.
>
> Thanks to all,
>
> David  K0LUM
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