4526P@NAVPGS.BITNET ("LT Scott A. Norton, USN") (02/05/88)
In a few months, I'll be moving to Yokosuka, Japan, to my next shipboard assignment, and I'll be taking my two Amigas along. The A1000 will live onboard ship, and the B2000 will be at home.( That's why _I_ thought the buyback deal was a good one! ) Onboard ship power is US flavor, 60 Hz 110V, but in Japan it is 50 Hz, and I think 220 Volt. Of course, I'll need a transformer to step down the voltage, but what I am worrying about is the effect of the 50 Hz on timing. Is this when I should shift the B2000's clock from LINE to VSYNC? Are there any other effects that 50 Hz power will have? I'm not planning on trying to change the video output from NTCS to whatever Japan has ( basically NTSC line count, but a larger bandwidth, I'm told ). Both Amigas will stay paired with 1080 and 2002 monitors. Also, can anyone give me advice on packing the systems so they will make the trip safely? I'm particulary concerned about the hard disk in the B2000. I didn't tell prep to park the heads, so is the now anyway to manually park them? A DOS packet I could send to the hard disk driver, maybe, to seek to track 70000? (I've got the A2090 controller ) Please mail any recommendations to: LT Scott A. Norton, USN Naval Postgraduate School Monterey, CA 93943-5018 4526P@NavPGS.BITNET 4526P@NPS.ARPA 4526P%NAVPGS@jade.berkeley.edu ( if your mailer can't handle the .BITNET domain )
kjws@eagle.ukc.ac.uk (K.J.W.Smithers) (02/12/88)
Expires: Sender: Followup-To: In article <8802050159.AA11570@jade.berkeley.edu> 4526P@NAVPGS.BITNET ("LT Scott A. Norton, USN") writes: >In a few months, I'll be moving to Yokosuka, Japan, to my next shipboard >assignment, and I'll be taking my two Amigas along. The A1000 will >live onboard ship, and the B2000 will be at home.( That's why _I_ thought >the buyback deal was a good one! ) > >Onboard ship power is US flavor, 60 Hz 110V, but in Japan it is 50 Hz, and >I think 220 Volt. Of course, I'll need a transformer to step down the >voltage, but what I am worrying about is the effect of the 50 Hz on timing. >Is this when I should shift the B2000's clock from LINE to VSYNC? Are >there any other effects that 50 Hz power will have? I successfully took my Amiga 1000 out to Japan (Tokyo) and had some interesting experiences. My major difference from your problem was that I have a PAL (UK) Amiga so the problem with the tv/mains is all switched around. I have heard rumours of only flimsy nature that there are parts of Japan that have a different supply system to tokyo. However I am sure that the following is true in my apartment in Tokyo. The mains voltage is 100v at 50hz, not 110v or 220v but 100v. The 100v supply has been known to work for some US equipment. It is easy enough to get step up transformers for the job, where I was working we had about 20 terminals all go down sick after a couple of months at 100v. Bolting on some step up transformers cured them! The tv system is the same as USA (NTSC) there would seem to be two versions but I never saw the NTSC 4.43 one in use, the other was something like NTSC 3.14. My PAL amiga was a very early UK one that had a PAL agnus but NTSC circuitry on the composite video, our world standard tv had no trouble adjusting to 50hz 625line with NTSC colour encoding. I did however find a multistandard RGB monitor (made by JVC). As for transporting the amigas I just wrapped mine up in my suitcase (no monitor) with my clothes and prayed, no-one had been willing to insure it! It arrived safetly and once I had it going it never gave me any trouble. Hope this helps.. Kit Smithers ------------------------------------------------------------------------------- Still trying to go hard and fast :-( kjws@ukc.UUCP !! prehaps try rpa@ukc.UUCP or !mcvax!ukc!rpa !mcvax!ukc!kjws !! it might get through better :-( or via British Telecom MUD (MultiUserDungeon) as 'Dingbot' -------------------------------------------------------------------------------
yann@ai.toronto.edu (Yann le Cun) (02/23/88)
In article <4400@eagle.ukc.ac.uk> kjws@ukc.ac.uk (K.J.W.Smithers) writes: >In article <8802050159.AA11570@jade.berkeley.edu> 4526P@NAVPGS.BITNET ("LT Scott A. Norton, USN") writes: >>In a few months, I'll be moving to Yokosuka, Japan, to my next shipboard >>assignment, and I'll be taking my two Amigas along. > I successfully took my Amiga 1000 out to Japan (Tokyo) and had some >interesting experiences. > As for transporting the amigas I just wrapped mine up in my suitcase >(no monitor) with my clothes and prayed, no-one had been willing to insure it! >It arrived safetly and once I had it going it never gave me any trouble. > Kit Smithers I did that too when i moved from France to Canada. My PAL A1000 (with a PAL/RGB colour monitor) works fine with a transformer. Remember that the video refresh rate is *NOT* related to the power frequency, Yann le Cun yann@ai.toronto.edu, yann@ai.toronto.cdn AI Group, Dept of Computer Science yann%ai.toronto.edu@relay.cs.net University of Toronto, Canada M5S 1A4 {uunet,watmath}!ai.toronto.edu!yann
wtm@neoucom.UUCP (Bill Mayhew) (03/02/88)
Some items get a little giddy in Japan because their wall outlet voltage is 100 volts rms, rather than the 120 volts rms typical in the continental USA. An Amiga would probably run on 100 volts, but the duty cyle on the power pack's switching regualtor circuit would have to adjust itself to have a pretty high on to off ratio. That might shorten the life of the power pack. A 500 watt transformer would be enough to run an entire Amiga system. One could probably get away with a 1.1:1 turns ratio auto transformer. A good industrial electronics supplier should have such a thing. It would probably be easier (and cheaper) to buy the transformer in the USA. --Bill
kjws@eagle.ukc.ac.uk (K.J.W.Smithers) (03/04/88)
Expires: Sender: Followup-To: In article <1030@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes: > >Some items get a little giddy in Japan because their wall outlet >voltage is 100 volts rms, rather than the 120 volts rms typical in >the continental USA. An Amiga would probably run on 100 volts, ....... >system. One could probably get away with a 1.1:1 turns ratio auto >transformer. A good industrial electronics supplier should have >such a thing. It would probably be easier (and cheaper) to buy the >transformer in the USA. > >--Bill If you ever go to Tokyo then you will find a little area ( (about a square mile) dedicated to selling electronics called Akihabara. This area I am fairly sure will provide you with cheaper transformers than available in the USA. I bought my step up transformer (100 to 240v) from little stall that seemed to sell only transformers. It cost me 2500 yen for a 100watt version that powered my a1000 +2-meg and 2nd drive happily. Of course with the US dollar acting like a roller coaster it may not be cheaper but especially if you fly out to Japan, the weight of your luggage is at a premium. At excess luggage rates just to carry my transformer (2Kgs) would cost 50dollars. Just another militant attack on the US economy. Kit Smithers. ------------------------------------------------------------------------------- Still trying to go hard and fast :-( kjws@ukc.UUCP !! prehaps try rpa@ukc.UUCP or !mcvax!ukc!rpa !mcvax!ukc!kjws !! it might get through better :-( or via British Telecom MUD (MultiUserDungeon) as 'Dingbot' -------------------------------------------------------------------------------