So, my UK101 sold for a healthy =A3224, which I am very happy about indee=
d.
I really am goign to have to look for another hobby...
However, it's to a buyer in the USA and he wants me to split the
bundle and send just the computer - he does not want the monitor.
He claims that although the computer will run on a 240-to-120V
transformer, the monitor will not, as US DC is 60Hz and European is
50Hz.
Is this correct? It's news to me.
It's very likely to be incorrect.
Yes, UK mains is 50Hz and US mains is 60Hz. Almost all monitors simply
produce one or more DC rails from this [1]. Provided the PSU in the
monitor will handle 60Hz -- and for any reasoable PSU design if it'll run
on 50Hz mains it'l lrun on 60Hz mains --then the monitor would be fie on
240V 60Hz. If not, then it would be a fairly easy job to convert it.
[1] An amazing number of small (12" or so) monochrome monitors, and not
jeust TV tarte ones, produve 12V from the mains by one of a number of PSU
circuits. This 12V is used to power the CRT heaters amd the lowe-power
cirucitry, the high voltages for the CRT electrodes and the video output
stage come fro mthe flyback transformer (itself powered from the 12V DC
supply). If it's that sort of design it doesn't much matter where the 12V
DC comes from.
Do you knw othe make and model of the monitor, just in case one of us has
ocme across it and has a scehamtic to hand?
A seconadary issue is the vertical sync rreqeucny of the machine. TV
cvertical rates are essentially the same as the main frequency i ntyhe
country to prevent problems wither with the CRT image beating against the
room lighing and cuasing flicker or to reduce the visible effects of
ripple from the mains PSU gettign into the video circuitry. So if the
buyer wishes to use the machine in the States he will presumably need a
monitor that can handle 50Hz vertical. Most small mono monitors can, and
in any case the mofification is not complicated. But I'd want to kepe the
oroginal monitor if possible.
I don't really want to split the package up, TBH - I am not sure that
the monitor is worth much on its own.
I suspect the _real_ reason is that the monitor is ratehr more delicate
than the rest of the machine, and would be fairly expnsive to ship.
-tony