Forum Topic: http://www.eevblog.com/forum/blog-specific/eevblog-344-fluke-17b-multimeter-teardown/
Teardown Tuesday
What's inside the cheap Made-in-China Fluke 17B Mulitmeter
NOTE: This meter is only available in the China and Indian markets. But you can get it from Chinese dealers on Ebay.
Thanks to http://www.toddfun.com
SIBA Fuse used: http://www.download.siba.de/pdf/artikel/SIBA-GSS-7017240.pdf
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Yet another dumpster diving LCD monitor repair.
This time an LG Flatron monitor with bad caps.
Using the Bob Parker ESR Meter
http://members.ozemail.com.au/~bobpar/esrmeter.htm
http://members.ozemail.com.au/~bobpar/k7214.pdf
Forum Topic: http://www.eevblog.com/forum/blog-specific/eevblog-365-esr-meter-bad-cap-monitor-repair
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How does a Countersurveillance Monitor (a.k.a Bug Detector) works to sweep a room for bugs?
Teardown of the Research Electronics CPM-700
Also a look at the NSA "LoudAuto" radar retro-reflector spy bug, and some cold war era Soviet embassy espionage.
NSA Spy Devices Brochure:
https://www.eff.org/document/20131230-appelbaum-nsa-ant-catalog
Talking Electronics FM Bugs:
http://www.talkingelectronics.com/projects/Fly/Fly.html
Forum: http://www.eevblog.com/forum/blog/eevblog-956-countersurveillance-monitor-teardown/
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Doug Ford, former head designer at Rode Microphones explains 48V phantom powering of microphones and how it works.
There is a ton of stuff here:
Electrostatic and electromagnetic noise, differential amplifiers, common mode noise, transformer magnetisation current, JFET differential driver circuits, balanced impedances, phase splitters, miller capacitance and how it matters, and he explains how the Schoeps amplifier topology works.
Forum here: http://www.eevblog.com/forum/blog/eevblog-616-how-microphone-phantom-powering-works/
All the videos in this series with Doug: http://www.youtube.com/playlist?list=PLvOlSehNtuHv98KUcud260yJBRQngBKiw
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Dave explains, shows, and measures a potentially big trap with using high value ceramic capacitors.
Is your 10uF capacitor really 10uF in your circuit? You might be shocked!
Those humble X7R caps you think are a "stable" dielectric? think again...
Class II and above ceramic capacitors can vary their capacitance drastically with DC bias voltage level and also the applied AC voltage.
Links:
http://www.murataamericas.com/murata/murata.nsf/promo_dcbias.pdf
http://www.avx.com/docs/masterpubs/mccc.pdf
http://www.ece.ucdavis.edu/vcl/asap/asap_v1/docs/X7R_C.pdf
http://psearch.murata.com/capacitor/product/GRM21BR60J106KE19%23.html
http://www.murata.com/products/design_support/simsurfing/outline.html
http://www.avx.com/SpiApps
Capacitor Tutorial - Ceramics & Impedance
https://www.youtube.com/watch?v=TDDoi70cxw0
The piezoelectric effect demonstrated:
https://www.youtube.com/watch?v=KFCRB4d991E
Forum: http://www.eevblog.com/forum/blog/eevblog-626-ceramic-capacitor-voltage-dependency-download/
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A look at the Ultra Micron, the world's smallest digital ionising radiation dosimeter, and it's Open Source Hardware.
https://github.com/shodanx/ultramicron
Russian SBM-10 Geiger Muller tube: http://www.gstube.com/data/2396/http://www.gstube.com/data/2396/
Forum: http://www.eevblog.com/forum/blog/eevblog-776-world's-smallest-digital-dosimeter/
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Dave repairs a classic HP 35660A Dynamic Signal Analyser (DSA), and does a bit of a teardown with random commentary in the process.
Service Manual: http://cp.literature.agilent.com/litweb/pdf/35660-90050.pdf
Forum: http://www.eevblog.com/forum/blog/eevblog-523-repair-hp-35660a-dynamic-signal-analyser/
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Dave checks out one of his favorite "old" oscilloscopes, the 2000 vintage Agilent 54622D mixed signal oscilloscope with the original megazoom ASIC technology and high resolution CRT display.
http://cp.literature.agilent.com/litweb/pdf/5968-8152EN.pdf
Original Megazoom presentation: http://www.hit.bme.hu/~papay/edu/Lab/MegaZoom.pdf
Megazoom III presentation: http://www.tequipment.net/assets/1/26/Documents/Agilent5988-9106EN.pdf
Gate Array datasheet: http://www.ic72.com/pdf_file/q/16580.pdf
Forum: http://www.eevblog.com/forum/blog/eevblog-591-agilent-54622d-retro-mixed-signal-osciloscope-review-teardown/
Teardown photos:
http://www.eevblog.com/2014/03/16/eevblog-591-agilent-54622d-retro-mixed-signal-osciloscope-review-teardown/
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