Dear list:
The story so far.....
> Also, always ground your computer.
> If I use my 486 with 220 volts without neutral to earth I cannot get
> more than 19,2k.
> If I ground it, I can get 45.5k regularly.
This is a remarkable effect. I have had problems with serial ports not
working at all with noise floating around, but not this speed effect.
Please, was this with an internal modem? Also was the grounding done to the
Mains house earth? In Australia all neutrals are grounded by law (MEN
system) and computer leads are three pin so the issue does not exist.
However, not being on mains I run from an inverter which can float or
not depending on how I connect it. I have never had any comms problem
except when the phone lines are really noisy from grounds on the phone
line which causes mains hum. Phones here are meant to float, but in a 3
metre rainfall they dont! Mind, I nver get more than 19.2K here in any
case.
If I may go on a bit, my James blew up a friends printer by having an
unearthed laptop connected to it hot. It should have been floating but
he measured significant leakage through its switch mode power supply
after the event. It seems a good idea to run laptops on their batteries
when carrying them around to printers. I also blew up a parallel port
in this computer when running a ribbon out to a DOS based data aquision
rig I have. It should have been floating, but there was a lot of noise
in gear being measured and the computer was floating.
Kali
PS I have found something worse that a windoze95 interface....Autocad14
printer drivers! After about five iterations between windows screens and
Autocad screens the machine still cant be told what size paper you have
and where you want to print! With joy I got to use my DOS Protel print
utility last night and found it will do exactly what you tell it!!!!
http://www.nimnet.asn.au/~kali
