{"action":"created","issue":{"url":"https://api.github.com/repos/m-labs/sinara/issues/263","repository_url":"https://api.github.com/repos/m-labs/sinara","labels_url":"https://api.github.com/repos/m-labs/sinara/issues/263/labels{/name}","comments_url":"https://api.github.com/repos/m-labs/sinara/issues/263/comments","events_url":"https://api.github.com/repos/m-labs/sinara/issues/263/events","html_url":"https://github.com/m-labs/sinara/issues/263","id":252694984,"number":263,"title":"stress on AFE from SMA","user":{"login":"jbqubit","id":20543958,"avatar_url":"https://avatars1.githubusercontent.com/u/20543958?v=4","gravatar_id":"","url":"https://api.github.com/users/jbqubit","html_url":"https://github.com/jbqubit","followers_url":"https://api.github.com/users/jbqubit/followers","following_url":"https://api.github.com/users/jbqubit/following{/other_user}","gists_url":"https://api.github.com/users/jbqubit/gists{/gist_id}","starred_url":"https://api.github.com/users/jbqubit/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jbqubit/subscriptions","organizations_url":"https://api.github.com/users/jbqubit/orgs","repos_url":"https://api.github.com/users/jbqubit/repos","events_url":"https://api.github.com/users/jbqubit/events{/privacy}","received_events_url":"https://api.github.com/users/jbqubit/received_events","type":"User","site_admin":false},"labels":[{"id":470809773,"url":"https://api.github.com/repos/m-labs/sinara/labels/area:analog-mezzanine","name":"area:analog-mezzanine","color":"bfdadc","default":false},{"id":470821114,"url":"https://api.github.com/repos/m-labs/sinara/labels/area:mechanical","name":"area:mechanical","color":"bfd4f2","default":false}],"state":"open","locked":false,"assignee":{"login":"gkasprow","id":4325054,"avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false},"assignees":[{"login":"gkasprow","id":4325054,"avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false},{"login":"filipswit","id":24258965,"avatar_url":"https://avatars0.githubusercontent.com/u/24258965?v=4","gravatar_id":"","url":"https://api.github.com/users/filipswit","html_url":"https://github.com/filipswit","followers_url":"https://api.github.com/users/filipswit/followers","following_url":"https://api.github.com/users/filipswit/following{/other_user}","gists_url":"https://api.github.com/users/filipswit/gists{/gist_id}","starred_url":"https://api.github.com/users/filipswit/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/filipswit/subscriptions","organizations_url":"https://api.github.com/users/filipswit/orgs","repos_url":"https://api.github.com/users/filipswit/repos","events_url":"https://api.github.com/users/filipswit/events{/privacy}","received_events_url":"https://api.github.com/users/filipswit/received_events","type":"User","site_admin":false}],"milestone":null,"comments":2,"created_at":"2017-08-24T18:47:49Z","updated_at":"2017-08-30T08:30:16Z","closed_at":null,"author_association":"COLLABORATOR","body":"SMA barrel on AFEs is long enough that the threads extend to the back side of the RTM panel. If user\r\ntightens nut on SMA barrel, SMPs and DIO header are stressed. We should advise users to /not/ use SMA nuts. \r\n\r\nAttachment of a SMA cable will put stress on SMPs and DIO header. The stress on the connectors is reduced if standoffs are used to secure the AFEs to the AMC_RTM. We should advise use of a SMA torque wrench. It looks like 8 in-lbs is [standard ](https://www.pasternack.com/preset-torque-wrench-5-16-bit-sma-2.92mm-3.5mm-8in-lbs-pe5011-1-p.aspx) torque. \r\n\r\n- [ ] @gkasprow Please include these standoffs (and screws) in the BOM. Add same for clock mezzanine too. These standoffs should be installed by default at the factory. \r\n\r\n@filipswit please update manual to \r\n- [ ] advise users to use standoffs and not use SMA nuts\r\n- [ ] advise users as to recommended SMA torque \r\n- [ ] include standoff and screws in list of user-replaceable parts\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/m-labs/sinara/issues/comments/325921198","html_url":"https://github.com/m-labs/sinara/issues/263#issuecomment-325921198","issue_url":"https://api.github.com/repos/m-labs/sinara/issues/263","id":325921198,"user":{"login":"gkasprow","id":4325054,"avatar_url":"https://avatars3.githubusercontent.com/u/4325054?v=4","gravatar_id":"","url":"https://api.github.com/users/gkasprow","html_url":"https://github.com/gkasprow","followers_url":"https://api.github.com/users/gkasprow/followers","following_url":"https://api.github.com/users/gkasprow/following{/other_user}","gists_url":"https://api.github.com/users/gkasprow/gists{/gist_id}","starred_url":"https://api.github.com/users/gkasprow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkasprow/subscriptions","organizations_url":"https://api.github.com/users/gkasprow/orgs","repos_url":"https://api.github.com/users/gkasprow/repos","events_url":"https://api.github.com/users/gkasprow/events{/privacy}","received_events_url":"https://api.github.com/users/gkasprow/received_events","type":"User","site_admin":false},"created_at":"2017-08-30T08:30:16Z","updated_at":"2017-08-30T08:30:16Z","author_association":"COLLABORATOR","body":"@dhslichter @jordens @jbqubit  the RTM is missing machined plastic panel which takes care about SMA isolation and  positioning of SMAs in the panel holes. It also reduces stress on AFE. We planned to use dedicated isolation washers but their assembly would be painful for so many SMAs."}}
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