Products > Test Equipment
Any better way to use a HP 6625A than dragging cables from the rear outputs?
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Tony_G:
Hi All,

While I was buying a 3458A at auction it came with a 6625A System DC Power Supply. I wasn't particularly interested in buying it or using it but it was part of the lot.

Now that I look at it, it seems to be able to provide 1 uA and 0.5 mV level control of the output - It might be useful to use that at some time.

The problem is that the outputs are on the back - Does anyone have a better solution that creating my own terminal block and just wiring it to the back of the supply?

There doesn't seem to be a lot of information or desire for these things around - I got mine from a facility shutdown of a Western Digital plant, maybe they simply aren't much use outside of specific test scenarios.

Thoughts?

TonyG
edpalmer42:
I have the  6622A dual-output member of the family.

I wired the output and sense leads via a 2 - 3 meter cable set to a terminal box.  I can take the terminal box over to my bench rather than trying to bring the equipment to the supply.  For the power leads, I used 16 AWG (~4 mm squared) stranded cable.  For the sense leads, my junk box coughed up a nice piece of two pair, twisted, stranded cable with each pair enclosed in a foil shield.  I put a spiral wrap around the cables to make a neat bundle.  I couldn't have come up with a better cable if I tried!
Berni:
I have a 4 channel version of it and i modified it to have front panel binding posts.

Its not as simple of a mod as on some other supplies as these ware never designed to have any sort of front panel connections. The front panel PCB just covers the button area, but there is some sheet metal bellow it that needs to be trimmed back a little to make room as well as the typical drill some holes in the front panel.

I have some photos of it somewhere.
TAMHAN:
Hello,
actually, dragging the cables is not so bad if you "adapt" to your situation. My HP 6624A is below a "bumper" to protect it from chairs driven against its front panel. And I created two cables which can directly plug into the breadboard by soldering normal breadboard bridges (cut in half) to cables.

Pics coming in a jiffy...
pelule:

--- Quote ---I have a 4 channel version of it and i modified it to have front panel binding posts.

Its not as simple of a mod as on some other supplies as these ware never designed to have any sort of front panel connections. The front panel PCB just covers the button area, but there is some sheet metal bellow it that needs to be trimmed back a little to make room as well as the typical drill some holes in the front panel.

I have some photos of it somewhere.

--- End quote ---
Just seen this post by Berni.
Never seen the photos, but I assume, Berni just mounted the supply outputs (+/-), means 8 the binding posts.
If so, you have no access to the sense connectors (add. 8 bindig posts) and thus you limit the use of the 6624A for low current use.
Thus I prefer to wire them from back of the suppy to my own terminal block.
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