Heathkit H89 maybe?

One method I've heard involves powering up slowly with a variac. Sent from my iPad On 2012-07-21, at 5:21 PM, David Betz <dbetz at xlisper.com> wrote: > It looks like I'm back in business collecting vintage computers. I went > to the town dump today and found what looks like an H89 but the model > number tag on the back says NN89-29. I haven't tried opening it up to see > what's inside yet but it has a floppy drive so I assume it isn't just a > H19 terminal. Also, on the front it says "Heathkit Computer". Even though > I've had vintage computers before I've never followed good procedures > when trying to bring them up. Usually, I just plug in the power cord and > hope for the best. I'd like to do a little better this time. Can anyone > suggest an approach to bringing this beast to life that minimizes the > chances that I'll fry it the first time I power it on? > > Thanks, > David