February diversions

Politics:

Article about the hastily-arranged anti-Iran-sanctions conference, which was full of all kinds of contradictions since Trump and Pence are usually about caving to America's enemies.
https://www.vox.com/world/2019/2/15/18225218/warsaw-summit-2019-iran-meeting-conference

The tip of my research into Trump's national emergency, which revealed that strangely there have been more than 50 national emergencies declared in modern times, and about 33 are still in effect!
https://www.bostonglobe.com/news/politics/2019/02/15/what-exactly-national-emergency-here-what-that-means-and-what-next/WvRZAgv1THUZLXTeAZQNUM/story.html

Work:

The article from Maxim for how the MAX1818 circuits in the load box are being configured as current regulators:
https://www.maximintegrated.com/en/app-notes/index.mvp/id/4404

Diversions:

Breathless review of The Lego Movie 2:
https://arstechnica.com/gaming/2019/02/lego-movie-2-isnt-just-amazing-its-also-the-solo-we-always-wanted/

A nice photo of models of Pathfinder, Opportunity, and Curiosity together showing differences in scale (this photo posted as a result of the news that Opportunity didn't reboot after the last dust storm):
https://upload.wikimedia.org/wikipedia/commons/thumb/4/42/PIA15279_3rovers-stand_D2011_1215_D521.jpg/1920px-PIA15279_3rovers-stand_D2011_1215_D521.jpg

Fyre Festival documentaries: https://newrepublic.com/article/153095/fyre-festival-huge-scam-netflixs-fyre-documentary-scam-too

Led Zepplin lawsuit: https://www.phillymag.com/news/2019/02/11/francis-malofiy-led-zeppelin/

Latest on the israeli moon lander, including some details on the star tracker problem:
https://m.jpost.com/Israel-News/Israeli-spacecraft-launches-Beresheet-heads-into-orbit-towards-the-moon-581575

Newest thinking about adult-developing food allergies:
https://tonic.vice.com/en_us/article/eved5w/why-do-some-people-suddenly-develop-food-allergies-later-in-life?utm_source=tonicfbus&fbclid=IwAR38mOLmGW6FgZEIMnfbQ4oRAgb07vLkZ_WbM3Tzd41pzmRHMJz8OJBNTRk

Crazy experiment which caused evolution of single cell bacteria into multicellular structures:
https://www.sciencealert.com/scientists-have-witnessed-in-real-time-a-single-celled-algae-evolve-into-a-multicellular-organism?fbclid=IwAR3C4HjTOz084z6EPFh1FyNkF7KPeCtitIyExS-V3a52G7uHBHlIGCWHxCc

A deep review of some theories on the topic (it sonehow took half a billion years):
https://astrobiology.nasa.gov/news/how-did-multicellular-life-evolve/

Everyone around you is grieving:

https://johnpavlovitz.com/2019/02/21/everyone-around-you-is-grieving-go-easy/?utm_source=NationSwellfacebook&utm_medium=outreach&utm_campaign=NationSwellOutreach&fbclid=IwAR0-sdzmajBUHgCaE9wt6V2bewDG_oOnG4Csf_ULcOX_9WXPlGLd5twjyUA


Do viruses age:

https://www.google.com/amp/s/amp.reddit.com/r/askscience/comments/1t5u7s/do_viruses_age/


Sanders private jet usage during Clinton campaign:

https://www.politico.com/amp/story/2019/02/25/bernie-sanders-hillary-clinton-private-jet-flights-1182793

First and only cat in space (suborbital):

https://en.m.wikipedia.org/wiki/Félicette

A fat rat stuck in a manhole cover. Amazingly, firefighters just released it back into the sewer:
https://www.nbcnews.com/news/amp/ncna976626

The humpback whale in the jungle turns out to be in a mangrove swamp:
https://amp.cnn.com/cnn/2019/02/26/world/dead-humpback-whale-brazil-trnd/index.html

Michael Cohen's incredibly ghost-written opening statement:
https://www.cnbc.com/amp/2019/02/27/michael-cohen-read-the-statement-about-donald-trump-here.html


Republican lawmakers ask for Cohen to be investigated:
https://amp.cnn.com/cnn/2019/02/28/politics/house-criminal-referral-michael-cohen/index.html

Disney princesses with modern careers:

https://amp.thisisinsider.com/disney-princess-jobs-2018-5?fbclid=IwAR0Ia-MlRmmyUQwUUW7WL4U7CAWPS3SRaglWwS2fYSq9chveCDBS2xOqMOM

Rear mount backshells compatible with jackposts

The go-to backshell for this is the one-piece Cannon ITT steel backshell, such as the DE24657 and its cousins.

Newark page for the DE24657:https://www.newark.com/cinch-connectivity-solutions/de24657/junction-shell-size-de-steel/dp/45F986#anchorTechnicalDOCS

The problem with this backshell is its coating of yellow chromate (apparently there is some zinc too). This may not be vacuum chamber compatible.

They make a clear coated one but it's oddly enough clear chromate.

Here is a link to the PDF of the full CINCH catalog. The DE24657 is on page 9: http://www.farnell.com/datasheets/671881.pdf?_ga=2.28253820.1338228539.1551109163-1653510471.1485545260

There are a few stamped sheet metal backshells that can possibly be used for rear panel mounting. These include the 3M 3357 (held together with a festive plastic nut on the back so it's not vacuum compatible), some two piece TE emi hoods with a very thin front channel (https://www.mouser.com/ProductDetail/TE-Connectivity/1-2308340-5?qs=%2fha2pyFaduj2ev0%252b1%252bYgy0scmK3sARzLM8%2f4k84RMN4W%2fcKQ6Zc%252bZQ%3d%3d), these custom one piece backshells: https://www.stahlmetall.com/pages/d-sub-rectangular-large-cable-entry-emi-rfi-shielded-backshell-metal-nickel-zinc-plated and something similar from the more reputable Plamco: http://www.polamco.com/bt-series-291/

Glenair has the super deluxe stainless-steel panel mount backshell series 500T009. https://cdn.glenair.com/catalogs/rectangular-connector-backshells.pdf In their same day stock the part number 550T009M1R3L0 is the E size, with no EMI gasket and strangely compatible with our milled panel thickness. In Octopart it shows that Powell sells it for $180 each in quantities of 10.

CINCH also made this wonderfully primitive looking single piece rear mount backshell called the 217 which includes designs with a straight exit and 4-40 tapped holes, but nobody sells them and they are probably discontinued by now

Here is a catalog page for one at Allied, which is linked to by a page for an electronics distributor in India: https://www.alliedelec.com/product/cinch/21715h-r/70544301/

Here is a fairly new looking datasheet for the 217 that still doesn't go a long way towards explaining what the weird extra piece is for: http://www.farnell.com/datasheets/22727.pdf

Octopart has some hits for the 9-pin version, including Allied and Arrow (both not in stock): https://octopart.com/search?q=2179H

The arrow link is revealed to be a "direct ship" scam: https://www.arrow.com/en/products/217-9h/cinch-connectivity-solutions