🔴 HP 6633A System DC Power Supply Upgrades - No.1136

HP 6633A System DC Power Supply Upgrades
I add front binding posts with sensing to a HP 6633A, which is basically the same as the HP6632A and HP6634A power supplies.
I also add a temperature controlled fan setup.
EEVblog forum thread: www.eevblog.co...
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[@Mi-Di]

I'm glad my guide was helpful!

[@IanScottJohnston]

Yep, "leave as standard".......I don't know the meaning of that either...🙂

[@hectorpascal]

Surely remote voltage sensing at 2A is hardly worth it - unless you want great accuracy at very low voltages? Just use short and thick wires feeding the equipment under test and monitor the voltage at their ends.

[@TheEmbeddedHobbyist]

you should have put 4 terminals on the front panel and brought the sense inputs out as well assuming there is room for the extra two.

[@TheDefpom]

It wouldn’t have been as easy, the front panel is thick aluminium, the binding posts have a cut out for them from the factory

[@Ismsanmar]

There it isn't. Only on the later model, B, have the cutout for that.

[@simontay4851]

Aluminium is easy to drill through, its soft metal. Its not that difficult.

[@TheDefpom]

@@simontay4851 the key point was THICK, it is way too thick for the binding post mounting, and really wasn’t worth the required effort to try and make a suitable reinforced mounting after cutting it away, so yes it is that hard, you just didn’t get to see what would have been involved.

[@andymouse]

Ok it's late I'm tired so humour me ! won't that cause limitations by not having the sense on separate posts ? why do meters with sense have seperate posts please as I havent had to use 4 wire measurements for ages...cheers.

[@TheDefpom]

Yes it does limit functionality from the front panel, BUT you can always still hook up to the rear sense terminals and use those if you really needed to. Dont forget this is only 2A max, so voltage drop isn't likely to be large anyway.

[@andymouse]

@@TheDefpom I did an edit ( hasn't showed up !) as I mouthed off before watching the whole video !...cheers;

[@Chriva]

Oof 80 Volts is starting to border actually dangerous territory if you have anything but bone dry hands. :/
Any reason they run the pre-regulated rail so hi?