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

Jay Jaeger cube1 at
Tue Aug 18 08:16:26 CDT 2015

On 8/17/2015 11:14 PM, tony duell wrote:
>> Well, in the process of repairing the Altos power supply I managed to
>> break the center lead off of the TIP31A that feeds the 2N3055 series
>> pass transistor.  This time, I need to order parts.
> Do you? The centre lead (collector) is connected to the tab on that transistor. So a 
> solder tag under the mounting screw (against the tab, not on top of an insulating bush
> linked to the appropriate pad on the PCB should fix it.

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
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.


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