madengr

31 ms·

91.
by madengr 5y ago
Couldn’t agree more. For a board I just designed, I need 22 uH inductors. I ended up ordering two substitute parts, then just today was able to order the desired parts. Those substitute parts will likely be scrapped. Hell, we now order p
92.
by madengr 5y ago
HP 8566B spectrum analyzer and 8510C network analyzer. HP RPN calculators. Really any late 80’s and early 90’s HP test equipment. Built like tanks and designed by engineers for engineers.
93.
by madengr 5y ago
Close, as the ratio of the inner and outer conductor diameters, to exactly get 50 Ohms, is an irrational number.
94.
by madengr 5y ago
Resistance to tyranny is always good.
95.
by madengr 5y ago
Who’s it supposed to be paid by?
96.
by madengr 5y ago
Avionics are going touch too: https://www.garmin.com/en-US/p/166058
97.
by madengr 5y ago
Back when engineering software ran on Unix, exclusively, you had no choice but to use one of these. I remember the Mentor sales guy having one to demo the latest IC design software.
98.
by madengr 5y ago
>Do they automatically re-tune differential pairs after you move things around? Yes, in fact they can length re-rematch groups of differential pairs. Altium does not have built in SI analysis, but it does have optional DC PI analysis, an
99.
by madengr 5y ago
Brother also makes machine tools and high-end sewing machines, so some of that quality mindset must flow into their consumer products.
100.
by madengr 5y ago
Yep. HP, Agilent, then Keysight, which is the only good part left of the original HP.
101.
by madengr 5y ago
“We have just folded space from China… Many machines in China… New machines..”.
102.
by madengr 5y ago
The article mentions GaN not widely used because it is integrated with Si. Cree’s process is GaN on SiC, so you’d get better heat dissipation than in Si, but it costs more. There are also done processes integrating a diamond heat spreader
103.
by madengr 5y ago
GPS uses PN codes for the timing difference measurement, as well as allowing multiple satellites on a single channel. I believe the dithering (selective availability) was turned off years ago, thus the L2 channel ads only ionospheric corre
104.
by madengr 5y ago
My kid has all 100% in several HS classes yet Canvas shows 99.99%. I tried explaining round off errors but she’ll have none of it.
105.
by madengr 5y ago
The Japanese actually have a word for death by over-work: https://en.m.wikipedia.org/wiki/Karoshi
106.
by madengr 5y ago
Several black and green "belt" like accessories were found, which we hypothesize were used for sacrificial strangulation to the statistical deity.
107.
by madengr 5y ago
There will be losses in the dipole conductor and resonator dielectric, so you have a finite input impedance, but that’s where the energy should go; into heat. You could use it as a dummy load over very narrow bandwidth.
108.
by madengr 5y ago
RF & antenna engineer here. I’d like to know the input impedance at resonance. If you take two closely spaced, parallel dipoles and drive them out of phase, you get the same effect of nulling the far field. The issue is the impedance
109.
by madengr 5y ago
Diesel is more energy dense, so better to compare it to a VW TDI of 40+ MPG. You are still hauling around all that weight. I have always wanted a VW (Rabbit) pickup. I don’t know why there are no diesel-electric trucks. If you need torqu
110.
by madengr 5y ago
Agreed. My MSEE was invaluable, and the math in my Advanced Engineering Electromagnetics course was pretty hairy.
111.
by madengr 5y ago
Yep, the Smart Things app has turned to shit. I’d also like to find some Zwave leak sensors that don’t arbitrarily trigger.
112.
by madengr 5y ago
I had a Blade 2000 with dual 24” monitors and the PC card. It was a beast.
113.
by madengr 5y ago
Had an IPX at that time too, stacked high with peripheral boxes. It acted as my auto-dial gateway to the internet. Of course that was connected to an HP 700 series workstation, a SGI Indigo^2, an IBM PS/2, and a Linux box. The good
114.
by madengr 5y ago
As a US citizen, you are less likely to be tortured in a foreign prison. This book is a good read: https://en.m.wikipedia.org/wiki/Operation_Acid_Gambit
115.
by madengr 5y ago
This article is about 18 months too late. At least I can actually buy bullets (yes, not cartridges) now, and primers were in stock at the store. 5.56 mm is down to $500/1k rounds from it’s high of $800. That is still crazy high, and
116.
by madengr 5y ago
How? I have seen people with 25 years service (electrical engineer) walked out with zero notice. Unless you are unionized, you can be fired on the spot.
117.
by madengr 5y ago
The latter. Profitable enough to make a living from, but not profitable enough (in these days) to be purchased and sustained.
118.
by madengr 5y ago
This trend is accelerating; small, one person companies founded near the beginning of personal computing are shutting down. Others that come to mind are MicroCAP for SPICE simulation, WRCAD for IC layout.
119.
by madengr 5y ago
As someone who grew up in the Cold War, it’s strange to see Russian and American aircraft used by a single military.
120.
by madengr 5y ago
The tube on the cover of this book is 1 MW at 90 GHz. https://www.amazon.com/Tube-Guys-Norman-H-Pond/dp/0981692303 It's for an airborne ADS (i.e. pain ray). Good book if you want the detailed history of micr

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