Re: TM 500 Power Module Tester and Utility Power Supply

Dave Seiter

It's on tekwiki, the last entry in the TM500 section.

On Friday, July 31, 2020, 12:39:58 PM PDT, Larry McDavid <lmcdavid@...> wrote:

Someone please provide the locations where these documents are available
or actual links to the documents. It is not helpful to talk about the
documents and not link to them.


On 7/31/2020 11:21 AM, Harvey White wrote:
It's worth building, if only partially.

As designed, it allows you to check AC voltage and phasing, bulk
supplies, power transistor beta (not directly), and provides a +5 and
+/- 15 volt general purpose supply.

Tektronix may or may not have made these, I don't know.  The description
suggests that it was intended for internal use as a testing tool.

If you do not want or need the regulated supplies, then bringing out the
transistors individually allows using a transistor tester.  A plugin
strip for a 5 volt regulated supply and pickoffs for the other pins (to
go to a front panel) could be made fairly easily, there are some designs
already that simply bring out the pins.  What you do with those pins is
up to you.

It's a design where you could throw a bit of technology at it and
automate some things, but that's an "up to you" kind of thing.

The pots are in the feedback circuit for the regulators and should
adjust the 15 volt supplies.


On 7/31/2020 1:43 PM, Colin Herbert via wrote:
Does anyone know any more about this item? It has the ID# 067-1201-99
and I have the Tek "manual" for it as a pdf. There was also another
document which was termed "Construction Note". Did Tek make any of
these, or did they see them as totally for people to make themselves?
The "manual" that I have has the ID# 061-3001-00. The "Construction
Note" (which I also have a pdf of) seems to be exactly that as well as
being a Service Manual in that it gives some assembly information that
would be useful to a constructor. Both documents include a schematic,
but I cannot find any information on the function of two preset pots
R127 and R227. These are described in the Replaceable Electric Parts
List as "non-wirewound, 5K0, 20%, 0.5W" and I am assuming that they
set the +15VDC and -15VDC output levels respectively.

It looks like an interesting item.


Best wishes,

Larry McDavid W6FUB
Anaheim, California  (SE of Los Angeles, near Disneyland)

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