TU56/TC11 restoration - Power supply question

[Scott Stevens]

On Fri, 18 Mar 2005 09:54:41 -0500
"Joe R." <rigdonj at cfl.rr.com> wrote:

> At 08:42 AM 3/18/05 +0100, you wrote:
> >Jay wrote:
> >> Yeah, I'll give you a primer on the capacitors on the TU56.... to
> >get > replacements is about $70 each! For the four motor run caps
> >anyways.> 
> >> I'll get to refurbing my TU56 "Someday".
> >
> >I hope to bring my TU56 back to life this year too ...!
> >
> >One note on the ### motor capacitors.
> >AFAIK there is a difference between motor *start* caps and *run*
> >caps. If I am wrong I would like to know, else what is the
> >difference?
> >
> >- Henk, PA8PDP.
> >
> 
>    AFIK there's no basic difference in the two types but they do have
> different voltage and capacitance ratings.  Dig up one of the OLD
> electrical machinery text books from the 40s or 50s. They usually had
> good descriptions of that kind of thing. the modern text books don't
> say crap about motors.
> 
>    Joe
> 
I work at a place right now that makes motors, and motor-based timers. 
These days all the motors are imported from Asia.  There's a great
bookshelf in the lab that has all the old classic 'electric motor'
textbooks.  A rather dusty shelf, I might add.

This is also the place that uses a Commodore SX64 to test electric
water-valves, incidentally.