λ-Bridge Thermal Conductor

Started by Winfield Hill in sci.electronics.design1 hour ago 14 replies

Sometimes you encounter things that blow your mind. New-product email from Mouser, with a section titled "RF Solutions from AVX", has a...

Sometimes you encounter things that blow your mind. New-product email from Mouser, with a section titled "RF Solutions from AVX", has a mind-boggling item, "AVX Lambda-Bridge Thermal Conductors". It's just an 0402, 0603 or 0805 package; could be a resistor, but it's an open circuit; could be a capacitor, but with no capacitance, well, less than 0.1pF anyway. https://www.mouser.co...


Nannies want to stop you from building mains-powered projects

Started by Don Kuenz in sci.electronics.design2 hours ago 171 replies

Just before this issue went to press, I received a product safety complaint via NSW Fair Trading, alleging that _Silicon Chip_ ...

Just before this issue went to press, I received a product safety complaint via NSW Fair Trading, alleging that _Silicon Chip_ magazine is unsafe. Apparently, this is because we explain how to build mains-powered devices, such as the Touch & IR Remote Control Dimmer featured in February and March this year. ... http://www.siliconchip.com.au/Issue/2019/April/Nannies+want+...


OT: Something new to worry about

Started by Cursitor Doom in sci.electronics.design2 hours ago 21 replies

We're all gonna die. "Earth?s magnetic field is getting significantly weaker, the magnetic north pole is shifting at an accelerating pace,...

We're all gonna die. "Earth?s magnetic field is getting significantly weaker, the magnetic north pole is shifting at an accelerating pace, and scientists readily admit that a sudden pole shift could potentially cause ?trillions of dollars? in damage. Today, most of us take the protection provided by Earth?s magnetic field completely for granted. It is essentially a colossa


Dull Hum Amp Sound Question

Started by ABLE1 in sci.electronics.design2 hours ago 53 replies

Hello, I have a customer with a paging system in their building. Over the past few days it has been noticed that there is a Dull Hum coming...

Hello, I have a customer with a paging system in their building. Over the past few days it has been noticed that there is a Dull Hum coming over the speakers. Some louder than others. I am not necessarily a "sound guy" but, it is electronics low voltage. I don't have the mfg. model at the moment but it could be a Bogen. > Maybe a 250 Watt at 70 volt with (1) output. > Speakers have


Oil Producers Are Burning Enough 'Waste' Gas to Power Every Home in Texas !

Started by Anonymous in sci.electronics.design3 hours ago 19 replies

Up to 550 million cubic feet daily, and this pales compared to Russia's 20 billion cubic meters annually! It's almost as if these idiots are...

Up to 550 million cubic feet daily, and this pales compared to Russia's 20 billion cubic meters annually! It's almost as if these idiots are defying the planet to die... https://www.bloomberg.com/news/articles/2019-04-10/permian-basin-is-flaring-more-gas-than-texas- residents-use-daily Global Gas Flaring Reduction Partnership (GGFR) http://www.worldbank.org/en/programs/gasflaringreductio


77GHz Radar with FR4 board?

Started by Joerg in sci.electronics.design5 hours ago 76 replies

Attention, non-political post! Has anyone used FR4 without a Rogers 3003 top layer for 77GHz automotive Radar purposes? If so, which...

Attention, non-political post! Has anyone used FR4 without a Rogers 3003 top layer for 77GHz automotive Radar purposes? If so, which kind/vendor? I know, I know, this ain't kosher but it's a cost-sensitive case and this one does not need to reach top-notch RF performance. And I promise not to try that on phenolic :-) -- Regards, Joerg http://www.analogconsultants.com/


OT: China Cuts E-vehicle Subsidies

Started by Winfield Hill in sci.electronics.design5 hours ago 50 replies

"As of June, the Chinese state subsidy for an electric car, now worth $9,830, will be cut to around $4,100. To qualify for any subsidy at...

"As of June, the Chinese state subsidy for an electric car, now worth $9,830, will be cut to around $4,100. To qualify for any subsidy at all an electric vehicle must now have a specified range of at least 250 miles. Over the next three months they will also abolish local government subsidies and channel these funds into improving the country's charge-station infrastructure." Ch...


Tax Refunds are less this year, must be Trumps fault

Started by amdx in sci.electronics.design6 hours ago 66 replies

So many reports about how the average tax refund is down from last year. But the reports leave out the fact that the average household tax...

So many reports about how the average tax refund is down from last year. But the reports leave out the fact that the average household tax bill has been reduced by $1,400. Mikek


Source follower with bip. Trans and bootstrapping for impedance increase

Started by Leo Baumann in sci.electronics.design7 hours ago 18 replies

Rolf Bombach has proposed the following circuit to increase the input impedance of a source follower with bip. Trans. And...

Rolf Bombach has proposed the following circuit to increase the input impedance of a source follower with bip. Trans. And Bootstrapping: www.leobaumann.de/newsgroups/Zin.png The real part of the input impedance at 100 MHz is now 2.57 kOhm. The input capacitance at the gate is only 1 / (608.55883 kOhm * 2 * Pi * 2 MHz) = 131 fF. wow - awesome for some applications


Air Pollution Makes Us Immoral and Imparts Criminal Tendencies

Started by Anonymous in sci.electronics.design15 hours ago 20 replies

The data is irrefutable...this explains so much. http://www.bbc.com/future/story/20190415-how-air-pollution-is-doing-more-than-killing-us

The data is irrefutable...this explains so much. http://www.bbc.com/future/story/20190415-how-air-pollution-is-doing-more-than-killing-us


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