Path: news1.icaen!news.uiowa.edu!NewsNG.Chicago.Qual.Net!137.192.241.248!newshub.nntp.mr.net!logbridge.uoregon.edu!newspeer1.nac.net!news.new-york.net!newsfeed.metronet.de!news.ruhrgebiet.individual.net!news-koe1.dfn.de!news.kfa-juelich.de!news From: Patrick Schaefer Newsgroups: comp.sys.apple2 Subject: Re: Help, need apple II drive chips! Date: Thu, 28 Jan 1999 19:33:06 +0100 Organization: Forschungszentrum Juelich GmbH Lines: 21 Message-ID: <36B0AD62.7DCA@fz-juelich.de> References: <36b88d5e.79756950@news.brightok.net> NNTP-Posting-Host: iff440.zam.kfa-juelich.de Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01Gold [de] (WinNT; I) Xref: news1.icaen comp.sys.apple2:144568 md wrote: > I would like to find where to get the four chips in the drive: > 74LS125 I found this one > CA3146 Operational Amplifier, several manufacturers. National Semiconductor? > MC3470P Motorola. Obsolete now. Get one from an old disk drive. This one will not blow from a reversed cable. > ULN2003 This is also called XR2003. Made by TI, Exar and some other companies. Very common chip, try to get one from an old printer. After replacing one of the analog chips the drive has to be re-aligned. The '125 and 2003 can be swapped without any adjustments. Patrick