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From: Robert Macy on 25 Feb 2010 02:12
Tektronix CPS250 Multiple Output Power Supply

Great Lab supply, but the 2N3055 for the 5Vdc supply blew out [very
leaky base-emitter junction, I think] and took out an internal fuse
too.

But I would like to see the schematic to see if there's a likelihood
that the death of the output transistor could have 'weakened' some
other parts.

So, ...is there any archive repository for these classic laboratory
units?

Schematic would be a big help. Assembly Drawings help, too.

One of those 'Calibration Labs' must have such a schematic in their
archives.

Robert
From: Dan Wright on 25 Feb 2010 10:15
On Feb 25, 2:12 am, Robert Macy <m...(a)california.com> wrote:
> Tektronix CPS250 Multiple Output Power Supply
>
> Great Lab supply, but the 2N3055 for the 5Vdc supply blew out [very
> leaky base-emitter junction, I think] and took out an internal fuse
> too.
>
> But I would like to see the schematic to see if there's a likelihood
> that the death of the output transistor could have 'weakened' some
> other parts.
>
> So, ...is there any archive repository for these classic laboratory
> units?
>
> Schematic would be a big help.  Assembly Drawings help, too.
>
> One of those 'Calibration Labs' must have such a schematic in their
> archives.
>
> Robert

Take a look at:
http://www.tequipment.net/TektronixCPS250.html

Also:
http://www.distisource.com/
has a lot of tech sheets linked from their site. Look at the bottom of
the page for links to those.

From: Robert Macy on 25 Feb 2010 15:17
On Feb 25, 7:15 am, Dan Wright <stano...(a)gmail.com> wrote:
> On Feb 25, 2:12 am, Robert Macy <m...(a)california.com> wrote:
>
>
>
>
>
> > Tektronix CPS250 Multiple Output Power Supply
>
> > Great Lab supply, but the 2N3055 for the 5Vdc supply blew out [very
> > leaky base-emitter junction, I think] and took out an internal fuse
> > too.
>
> > But I would like to see the schematic to see if there's a likelihood
> > that the death of the output transistor could have 'weakened' some
> > other parts.
>
> > So, ...is there any archive repository for these classic laboratory
> > units?
>
> > Schematic would be a big help.  Assembly Drawings help, too.
>
> > One of those 'Calibration Labs' must have such a schematic in their
> > archives.
>
> > Robert
>
> Take a look at:http://www.tequipment.net/TektronixCPS250.html
>
> Also:http://www.distisource.com/
> has a lot of tech sheets linked from their site. Look at the bottom of
> the page for links to those.

Thank you for your reply. At least I got a copy of the "Users Manual"
from the Tektronix website.

The links at the bottom of distisourc.com did not list any Tektronix
products. Did I miss something?

Either way, thanks for acquainting me with this website. I gave up on
Globalspec as useless. Perhaps this site has better search/
information/display.

Robert
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