Hi Josh, i have restored last year a PDP-8/a to and had the same experience like you with the Powersuppy. I felt also wiered about the bang in the transformer in the moment of switching it on.
Marco > Am 09.06.2020 um 09:02 schrieb Josh Dersch via cctalk <[email protected]>: > > Hi all -- > > I'm working on a PDP-8/A I picked up at VCF West last summer. After a lot > of cleaning and some power supply repair it's showing signs of life (CPU > seems to be at least minimally functional, core memory is going to need > some debugging.) > > The transformer in the power supply is humming quite loudly, however, and > I'm curious if this is normal for the 8/A (or is typical for an 8/A of this > vintage). I'm used to the supplies in various other DEC machines not being > exactly silent but this is a rather severe 60Hz buzz that you can clearly > hear over the fans when the machine is in operation. > > Thanks, > Josh
