HP/Agilent has built some very good power supplies like the HP6632B (0..20V 0..5A). From time to time you can score one of these beefy devices in used condition for little money on eBay for example. However most of the time they do not have front panel connectors installed. That is because they are often installed in a rack, hard wired to some other equipment using the back panel connectors.
Dave Jones has posted a video to his blog, where he upgrades his 6643A (very similar construction to the HP6632B) with binding posts.
I have done a similar hack about a year ago. All the outputs from the rear are wired to the front.
At the rear there is a gap above the connector which comes handy for running the cables inside. At the inside of the front I have added a strong sheet of plastic, because – as can be seen in Dave’s video – the original front panel cutouts are too large for ordinary binding post connectors.
At the front panel there are now 5 connectors: +, -, Sense +, Sense – and mains earth. Also there is a little switch, that either shorts the sense wires to the output connectors or leaves them unconnected. So I can easily switch between the internal voltage feedback loop or an external feedback connection for higher loads and increased voltage stability.
I wanted to have a decent look at the front panel, so I designed a custom label for the new connectors. It is designed as 10cm x 15cm photo, so it can easily be printed in very good quality using your local photo dealer (you just have to play around with scaling and contrast to match the output to the actual device).
Meanwhile I have hacked two 6632Bs and once again I am very happy with the result 🙂