Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!apple!oliveb!tymix!opus!mikemo From: mikemo@opus.uucp (Mike Mo) Newsgroups: comp.sys.cbm Subject: Re: C64 power supply Message-ID: <2752@tymix.UUCP> Date: 25 Sep 89 20:56:34 GMT References: <7296@max.u.washington.edu> Sender: news@tymix.UUCP Reply-To: mikemo@opus.UUCP (Mike Mo) Organization: Tymnet NTD, San Jose CA Lines: 22 Sender:Mike Mo Distribution:comp.sys.cbm Scott: About your power supply, I have some personal experince that may be useful. I repaired two C64 power supply before. None of them had a bad transformer. Their common problem is the 5V regulator. After I changed the failed regulator they all worked fine. My response to your questions is as follows: 1. Transformer does go bad if it is shorted internally, but it is very rare. 2. If you need a replacement transformer, it should have 120V primary, two secondary winding, two 9V 2A windings would be fine or try to use an 18V, 2A center tapped secondary (break the center tap, so it is two 9V 2A windings). For transformer part number please see Radio shack catalog? Good Luck! /* Disclaimer: McDonnell Douglas has nothing to do with my opinions *//* Mike Mo */ /* McDonnell Douglas Tymnet */ /* San Jose, Ca */ /* (408)922-6032 */