Teardown and calibration checking of a Keithley 480 Picoammeter Dave got from ebay.
This was supposed to be a repair and troubleshooting as well, but Murphy had other ideas.
Keithley 480 User & Service Manual: http://www.ko4bb.com/Manuals/09)_Misc_Test_Equipment/Keithley/Keithley_Model_480_Picoammeter_Complete.pdf
Forum Topic: http://www.eevblog.com/forum/blog/eevblog-406-keithley-480-picoammeter-teardown-calibration/
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https://www.youtube.com/watch?v=zDcl0-t7ceY
Dave unboxes, tests, inspects and repairs the first returned faulty EEVBlog BM235 Multimeter.
What will the be the fault?
Forum: http://www.eevblog.com/forum/blog/eevblog-884-eevblog-bm235-multimeter-repair/
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https://www.youtube.com/watch?v=YM--cxT6X3k
Teardown of a $250,000 1991 vintage IBM 9121 TCM Processor module from a System/390 ES9000 Enterprise Server mainframe computer,.
Amazing state of the art 63 layer ceramic hybrid module construction with 2772 pins!
And Dave demonstrates an amazing BGA desoldering technique that can only be done on these ceramic hybrid PCB's.
TCM PDF: https://eevblog.com/files/ibm-system390-air-cooled-alumina-thermal-conduction-module.pdf
Forum: https://www.eevblog.com/forum/blog/eevblog-1341-amazing-$250-000-ibm-processor-teardown/
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https://www.youtube.com/watch?v=xQ3oJlt4GrI
Bit-Banging an I²C port with David.
Git link: https://gitlab.com/Sepps/generic-bitbang-library-v1
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Phil VK2BDF from the Manly Warringah HAM Radio Society shows off his 1970's vintage home made 200MHz DIY spectrum analyser.
Forum: http://www.eevblog.com/forum/blog/eevblog-575-diy-1970s-spectrum-analyser/
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https://www.youtube.com/watch?v=579SYLxORyw
What's inside a $250,000 1980's vintage IBM server hard drive used in banks?
1989 vintage Model 3390 mod2 1.89GB or 3.78GB
http://www-03.ibm.com/ibm/history/exhibits/storage/storage_3390.html
Forum Topic: http://www.eevblog.com/forum/blog/eevblog-395-world's-most-expensive-hard-drive-teardown/
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https://www.youtube.com/watch?v=CBjoWMA5d84
Burden Voltage is a BIG trap with Multimeters, don't get caught out!
A short video demonstrating the impact of Burden Voltage / Shunt Resistance on current measurement.
Mutlimeter Shunt Tutorial Part1: https://www.youtube.com/watch?v=jx0dryLmUEQ
Part 2: https://www.youtube.com/watch?v=xSEYPP5Xsi0
Forum: https://www.eevblog.com/forum/blog/eevblog-1604-beware-multimeter-burden-voltage/
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#ElectronicsCreators #Multimeter #tutorial
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https://www.youtube.com/watch?v=GRRvGj8OT_A
HUGE news!
Welcome the new full time host of the EEVdumpsterHack channel!
Subscribe here for a channel devoted to dumpster hacking:
https://www.youtube.com/channel/UCYPLfIuQ290s9ojMdjwqEdg
Live subscriber counter! https://socialblade.com/youtube/channel/UCYPLfIuQ290s9ojMdjwqEdg/realtime
Let us know your thoughts below, and who should the corporate sponsor be?
Forum: http://www.eevblog.com/forum/blog/eevblog-1070-what-the-hack-dumpster-hacking/
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https://www.youtube.com/watch?v=5WlRm-ghuoA