Of course! Find the exception that proves the rule! -- Will
On Thu, Dec 31, 2015 at 12:23 AM, Guy Sotomayor <g...@shiresoft.com> wrote: > > > On 12/30/15 9:06 PM, William Donzelli wrote: >> >> Sorry about digging up a slightly stale thread... >> >>> I haven't done any troubleshooting yet but checking the manuals on >>> Bitsavers tells me my US 3278s have ferroresonant transformers >>> specified as 120V 60Hz only. This can be expected to cause problems >>> with 120V 50Hz here in NZ from my knowledge of how ferroresonant >>> transformers work; I'll get excessive magnetic currents - overheating >>> - all kinds of nasties. I can wind the voltage down a bit and run them >>> at 90-100V but that doesn't help much. >> >> ...but straight from the horses mouth, most IBM ferroresonant >> transformers will work at 50 or 60 Hz. The capacitor may need to be >> swapped, depending on the equipment. >> >> I was hanging around some IBM old timers this evening, including the >> Big Horse at Endicott. > > > I just looked up the FE manual for the 3278 and it shows 5 different part > numbers for the > ferroresonant transformer (depending upon region) and only a single part > number for the > capacitor. > > TTFN - Guy
