On Sun, Jan 04, 2004 at 09:04:49PM +0100, Arnt Karlsen wrote: > On Sun, 4 Jan 2004 19:23:58 +0100, > Osamu Aoki <osamu@debian.org> wrote in message > <[🔎] 20040104182358.GB9012@aokiconsulting.com>: > > > On Sat, Jan 03, 2004 at 02:31:12PM +0000, Pigeon wrote: > > > On Fri, Jan 02, 2004 at 07:08:38PM -0800, Paul Johnson wrote: > > > > -----BEGIN PGP SIGNED MESSAGE----- > > > > Hash: SHA1 > > > > > > > > On Fri, Jan 02, 2004 at 02:13:12PM -0600, Jacob S. wrote: > > > > > That's an interesting thought. Any recommendations for a good > > > > > online store selling external modems in the UK? > > > > > > > > I wouldn't bother. The US dollar is super-weak right now, so a 25 > > > > pound modem is going to be more like $60, plus add $30 for > > > > overseas shipping and whatever customs duties there might be. > > > > > > Hmm, wonder if that's why they've got so cheap over here... > > > > > > > Price is not all the issue here. > > > > Most MODEM comes with AC adapter with transformer. It is locked to AC > > voltage and plug type. UK != US Just do not think about it. I did mention this in my original post :-) I didn't consider the additional cost of changing the adapter, as they're so cheap and widely available. I'd be a bit surprised if they were significantly more expensive in the US. > ..these usually states the low voltage ampereage and voltage too, like > in "Input 230VAC ~ 50 Hz 20W, Output 13V =-=-= 1A 13VA ", or > "Input 230VAC ~ 50 Hz 75mW, Output 9VAC ~ 800mA 7.2VA", no? Invariably, IME. I think it's a legal requirement. > ..on replaceing the transformer adapter, you basically need to match the > modems power demand, it should be printed in the docs or on the case. > > ..the only showstoppers I can think of, is noise filters set to weed out > 50Hz in the US and 60Hz elsewhere, and clock circuitry useing the > power mains as a time source (hellooo!). ;-) s/US/UK/ In practical terms, if the smoothing can cope with 50Hz, it will cope with 60Hz; it'll be in the adapter not the modem anyway; and it's generally designed on the basis of "1000uF is big enough" :-) Using the power mains as a time source is fine for things like synchronous-motor-driven clocks (of the kind that humans tell the time with), as long as you're in the right country; at least in the UK, the frequency is legally required to average out to exactly 50Hz in a 24-hour period. But all "computer-type" circuitry uses crystals, because (a) 50Hz is too low a frequency to be much use, and (b) the short-term stability is better from crystals. Also, it's difficult to get a time reference from DC... -- Pigeon Be kind to pigeons Get my GPG key here: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x21C61F7F
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