ovdluhe@ethz.UUCP (Oskar von der Luehe) (11/04/88)
Hello net-landers, I am in the process of bringing an AT&T Unix-PC from the States back to Europe. Of course, the machine runs on 110 V and 60 Hz. I was trying to figure out what it would take to get the machine running on 220 V (should not be too difficult) and 50 Hz (may be more of a problem). The documentation that came with the machine as well as with the software (PC Unix Rev. 3.51 and 3.51 Utilities) doesn't tell much about the hardware. The machine is one of the smaller 7300 versions; i. e., it has 512 KB RAM and the slow 20 MB hard disk. Motherboard revision level is P3...P5. There are three scenarios, as far as I can see: 1.) Swap or re-solder a jumper in the power supply, because AT&T or CT had the foresight to make the PC internationally power-compatible. Most preferrable solution, of course. Some of the phone installation procedures indicated international features, if I recall correctly. So this possibility might not be completely out of the question. 2.) Get a 220V - to - 110V transformer at 400 VA and don't care about 50/60 Hz. Costs: about $100. Would work if there is nothing in the machine that depends on 60 Hz. The most likely candidate for 60 Hz dependance would be the monitor - unfortunately I have no way of finding out. Also, the power supply might perform differently if it is fed with 50 Hz instead of 60 Hz. 3.) Get a 400 VA 220V-to-110V, 50Hz-to-60Hz converter. Sure bet, but sounds uncomfortably expensive. I don't know if those things even exist at a reasonable price. Is there anybody out there who has experience with this problem or who happens to have the apropriate documentation handy? I appreciate ANY information. I am willing to post a summary. Please reply by e-mail or post to comp.sys.att (to my greatest distress, I can't receive "unix-pc.*" newsgroups here) - this might be of common interest. Oskar ________________________________________________________________________ Oskar von der Luehe UUCP: "...!cernvax!ethz!ovdluhe" Institut fuer Astronomie (Other mailboxes under construction) ETH-Zentrum CH-8092 Zuerich "...opinions? Why would I have opinions?" Switzerland
strandh@geocub.UUCP (Robert Strandh) (11/12/88)
I am running my 3B1 on 220V 50 Hz using a transformer that I bought in the local electronics store in the states. I think the price was much less than $100, but I am not quite sure about that. The machine has been running for almost a year now, without any problem whatsoever.