To do the job properley the swich should be mounted in a metal box ( sheet
ali or diecast ) and the box should be grounded. But I assumed that you'd do
it that way anyway!

Ian


"Todd Pattist" wrote in message
...
"Paul Remde" wrote:

However, the downside to using a switch is that RS-232 data lines are
noisy
and it would be difficult to shield the switch well (putting foil around
it
wont help). It may cause radio interference. Therefore, I don't really
recommend it.

Thanks Paul, that's the kind of info I was looking for.
What kind of problems did you see? Were there problems on
the RS-232 lines that caused data communication errors or
are you referring to RFI and radio noise? I was going to
give him some shielded cable for running to/from the switch,
but I hoped it wasn't going to require putting the switch in
a shielded box. I've got two GPS units that plug into
sockets where the RS-232 RXD/TXD lines are exposed for a few
inches, and I'm not seeing any problems. He was considering
mounting one Volkslogger on its side so he could remove the
cable and swap them, but I think that would cause more
problems (with reception) than a simple switch.
Todd Pattist - "WH" Ventus C
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