Shugart 800 spindle bearings (Re: Shugart 800-8 media centering problem)

tony duell ard at
Tue Aug 18 16:11:47 CDT 2015

> Yeah, but the TIP31A part is cheap, and is free air mounted on its leads
> - it isn't screwed down.  I'd rather do the repair nicely.  Anyway, it


What I would do is bolt a tag + wire onto the tab of the old transistor (don't
tell me you don't keep solder tags and small nuts/bolts (M3, 4-40 UNC, whatever)
'in stock' and get it running for the moment. You can then carry on debugging the

> gave me an excuse to order a 750 ohm resistor so that replacement
> matches, instead of the 2 x 1.5K parallel pair I had put in.

And also order a replacement transistor and resistors and fit them when they


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