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| An ugly but working HP6060B Electronic Load |
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| Swake:
Do I understand correctly that the L-shaped brackets that are used to connect the wires to the motherboard are actually original parts used by HP? The pictures give the impression these brackets are made out of aluminium. I've always had the idea that because of the so rapidly forming oxidation layer on the aluminium it would be very difficult to create a good connection. |
| AMR Labs:
--- Quote from: Swake on January 22, 2023, 09:39:07 pm ---Do I understand correctly that the L-shaped brackets that are used to connect the wires to the motherboard are actually original parts used by HP? The pictures give the impression these brackets are made out of aluminium. I've always had the idea that because of the so rapidly forming oxidation layer on the aluminium it would be very difficult to create a good connection. --- End quote --- I don't think they are made out of aluminum, that would have been not the best option in terms of conductivity given the 60Amp rating of the load, and I doubt HP would have made that strange choice. This besides the chance of electrolysis induced corrosion as you mention would have been I am sure very well considered. Those L brackets I would assume are plated copper if I am not mistaken. In any case something way better than aluminum. |
| amc184:
The L-brackets are original. When the binding posts are mounted on the rear panel they bolt directly into these brackets. I'll have to look at them again, I'm not sure exactly what material they are made of, but it looks a lot like aluminium. |
| Swake:
--- Quote from: AMR Labs on January 22, 2023, 11:17:07 pm ---electrolysis induced corrosion --- End quote --- Wasn't thinking about electrolysis but indeed this might become a factor too. I looked at that picture again and to be honest one will have a very hard time convincing me those brackets are not made out of aluminium. Aluminium is a good electric conductor and it is used in many high current applications including wires. That part I'm convinced it is ok. But the aluminium oxide layer that is formed so quickly when it is in contact with air is a very good insulator. Apparently bolting something on it is creating good enough conductivity. Found several other pictures with the same brackets. Here is an example. https://github.com/fivesixzero/hp-6060b-front-binding-post-mod/blob/main/images/binding-posts-installed-whole-device.jpeg |
| AVGresponding:
The brackets may well be aluminium, but the threaded inserts are going to be zinc plated steel. |
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