[SOLVED] WTB: (AU) Agilent E3612A Power Supply buttons and binding posts - Page 1
Forum section: electronics / general

author: enut11
author_rank: Super Contributor
timestamp: October 12, 2023, 05:55:39 am
content: I just purchased an Agilent E3612A power supply and it is missing two buttons and outer binding posts.Anyone have a source of these items?enut11

author: ause
author_rank: Newbie
timestamp: October 12, 2023, 11:04:16 am
content: Have you tried Keysight Find-a-part, there's a local office in Melbourne. Have used them a couple of times.0371-3806 might be the key cap for those buttons. They have binding posts as well, but might be worth looking up service manual for exact part numbers. You can lookup by part number or product model..

author: iJoseph2
author_rank: Regular Contributor
timestamp: October 14, 2023, 11:03:01 am
content: Quote from: enut11 on October 12, 2023, 05:55:39 amUnfortunately not. There was a time when these were available from tme ..https://www.eevblog.com/forum/repair/hp-agilent-keysight-binding-posts-suitable-replacements/

author: enut11
author_rank: Super Contributor
timestamp: October 18, 2023, 11:01:27 pm
content: When I opened the PS, I found the Agilent plastic thread binding posts had split. I ended up using these binding posts purchased on ebay. The all-metal thread should last longer.

author: TERRA Operative
author_rank: Super Contributor
timestamp: October 19, 2023, 12:00:01 am
content: I used similar ones from ebay to replace the binding posts for the ground connection.Apparently there were a few variants. Here in Japan I sometmies see red and red for the + and - outputs with black for GND, I prefer red, black, green.I've also found some with single turn pots on the current control rather than the 10 turn pot that is usually there, no option numbers or other markings to suggest a variant. Not sure what's up with that...

author: nfmax
author_rank: Super Contributor
timestamp: October 19, 2023, 03:14:54 pm
content: Quote from: TERRA Operative on October 19, 2023, 12:00:01 amWeird! I just scored one of these, off a long-standing eBay search, that has a single-turn current control. It was puzzling me. It needs to be Taken Apart as the current limit set isn’t behaving properly, and I wondered if a gorilla had been in there before me.

author: iJoseph2
author_rank: Regular Contributor
timestamp: October 19, 2023, 04:22:08 pm
content: Looking at the manual on page 1-5https://docs.rs-online.com/7599/0900766b80030513.pdfIt does say "adjust 10-turn VOLTAGE control" and "adjust 10-turn CURRENT control" so I guess they did come with 10-turn pots from factory

author: iJoseph2
author_rank: Regular Contributor
timestamp: October 19, 2023, 04:27:16 pm
content: Data sheet says 10-turn pots..https://www.rlscientific.com/documenti/E3610.pdf

author: alm
author_rank: Super Contributor
timestamp: October 19, 2023, 09:17:53 pm
content: Quote from: TERRA Operative on October 19, 2023, 12:00:01 amThat has been the HP standard for a while. My seventies-era HP 6200B also has the red black red scheme. I agree with you that red green back would make more sense, but I guess green didn't fit their color scheme, or they didn't want to pay for three different color binding posts.I looked through a bunch of catalogs, but the E361x series was always sold as having two ten-turn pots and I didn't see any option to delete the ten-turn current pot. I have seen such options on other HP instruments like their current sources, so it wouldn't surprise me if it were a mod for a large customer to save some costs, but it seems more likely that someone replaced the pot later. Was there min/max marking on the case as you normally see with single turn pots? Was it a correct-looking knob with position indication?

author: TERRA Operative
author_rank: Super Contributor
timestamp: October 20, 2023, 12:04:59 am
content: The strange thing is, I have 4 power supplies across all 3 variants (E3610A, E3611A, E3612A) with some HP and one Agilent, and they were a mix of red-black-green and red-red-black among the HP units.Interestingly, it was only the HP E3611A that were red-red-black, so maybe something particular to that model?