0.15 pitch connector replacement (24 pin SIP) - Page 1
Forum section: electronics / projects

author: coppercone2
author_rank: Super Contributor
timestamp: October 25, 2024, 06:17:27 am
content: my 6181C turns out to have haunted cabling. I don't know whats wrong but I did some board swaps and its definately the wiring. I can probobly track down the problem but I think I should replace all of it before it does something stupid to a load. (current sources are known to fry valuable things)The PCB has a 24 pin and a 10 position SIP 0.15'' pin pitch female rectangle connector on normal size square pins.While I can replace all the pins with staked turrets, and solder it, I thought maybe someone has a rectangular cable solution to the problem.The old part # is AMP 1-86459-0 and -5. It looks like something around 20AWG would work.Does anyone make anything similar anymore? Or at least reasonably big, so I can do maybe 2 connectors instead of 1 big one.Or maybe four 6 pin connectors?oh and no MTA. I would rather solder it then use MTA.But replacing the pins with something else is OK (like a SIP terminal block that is upright)

author: ajb
author_rank: Super Contributor
timestamp: October 25, 2024, 03:59:45 pm
content: Is it actually 0.15", or could it be 0.156/0.157" aka 4mm? A quick search didn't turn up anything about the part number you gave, and that small difference in pitch is significant over 10/24 positions. Also what does "normal size square pins" mean? Normal size for a ~4mm header, or normal size for a 100mil header?

author: coppercone2
author_rank: Super Contributor
timestamp: October 25, 2024, 04:22:58 pm
content: the document says 0.150http://datasheet.iiic.cc/datasheets-1/te_connectivity/86402-1.pdf

author: coppice
author_rank: Super Contributor
timestamp: October 25, 2024, 04:24:22 pm
content: Quote from: ajb on October 25, 2024, 03:59:45 pm0.156" is not an approximation for 4mm. When you look at data sheets for 0.156" pitch connectors, the pitch is given as 3.96mm in the metric data. I don't know where that size originates from, but it was extremely popular with American companies in the 1970s.

author: tooki
author_rank: Super Contributor
timestamp: October 25, 2024, 04:58:42 pm
content: Quote from: coppercone2 on October 25, 2024, 04:22:58 pmIndeed. For a much more legible datasheet, see page 76 ofhttps://www.rsp-italy.it/Electronics/Databooks/AMP/_contents/AMP%20Engineering%20and%20Purchasing%20Guide%2014%201976.pdf(beware, very large PDF).

author: tooki
author_rank: Super Contributor
timestamp: October 25, 2024, 05:00:07 pm
content: Quote from: coppice on October 25, 2024, 04:24:22 pmIt’s 5/32”.

author: coppice
author_rank: Super Contributor
timestamp: October 25, 2024, 05:13:21 pm
content: Quote from: tooki on October 25, 2024, 05:00:07 pmDarn, I should have realised it was something like that. I, too, am from the time of rulers divided in a binary manner, with lip service sometimes being given to 1/10ths.

author: tooki
author_rank: Super Contributor
timestamp: October 25, 2024, 05:16:31 pm
content: Quote from: coppercone2 on October 25, 2024, 06:17:27 amIf the plug housings are still in good shape, why not just reuse them with fresh contacts? Those housings are MOD IV, so while those 0.150” pitch housings aren’t made any more, the contacts that go in them are the same as for the 0.1” MOD IV housings still made today. So you could just remove all the wires and contacts and make new harnesses with new wires and new contacts.

author: tooki
author_rank: Super Contributor
timestamp: October 25, 2024, 05:17:59 pm
content: Quote from: ajb on October 25, 2024, 03:59:45 pmThey’re MOD IV, which uses standard 0.64mm posts.See page 4 of the large PDF I linked above. It describes the different sub-families within the AMPMODU family. (I, II, III, and IV at the time. MOD V came later.)