Good Lord, AlwaysWrong. Learn to read!
Out-of-tolerance zero ohm resistors
May 29, 2015
140 Replies
You're always wrong, AlwaysWrong.
No, I was not an IBM Fellow. Just a design engineer. Idiot!
You're still AlwaysWrong.
It can make all the Johnson noise it wants to, I'd have a perfect business model for those and would soon retire on my own island, including landing strip and private jet :-)
Regards, Joerg
http://www.analogconsultants.com/
On Mon, 01 Jun 2015 12:35:32 -0400, krw Gave us:
snip
It is a modern world, child. GOLD IS the "proper way", dufus.
Even my motherboards use it, and now you are going to tell me it costs so much more? If it did, they would not be doing it.
Purely imaginary, of course. ;)
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
hobbs at electrooptical dot net
http://electrooptical.net
On Mon, 01 Jun 2015 14:34:36 -0400, Phil Hobbs Gave us:
Unless you are in Rock Ridge. There is a huge amount of Johnson noise there, regardless of the resistance value. :-)
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The line was designed and set up by experts. And it's operated by experts. We prefer a few microinches of flat gold than some random number of mils of bumpy, crufty, tarnished ROHS solder.
750 pin BGAs, and lots of other things, solder better to planar, gold pads.
John Larkin Highland Technology, Inc
picosecond timing precision measurement
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
Mhos are cheaper and work just as well.
John Larkin Highland Technology, Inc
picosecond timing precision measurement
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
Am 01.06.2015 um 17:53 schrieb John Larkin:
.. and if you have 50 Ohms and -50 Ohms in series, I'd bet that not many simulators get the noise right thanks to node collapsing?
regards, Gerhard
Except that they aren't ROHS.
Cheers
Phil Hobbs
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
hobbs at electrooptical dot net
http://electrooptical.net
Siemens may be, but they might not meet with biohazard safety rules.
Tim
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: http://seventransistorlabs.com
You are such a trip... lol
Rick
According to politicians and federal bankers there would be no node collapse as this would still total about +32 ohms. Or over +60ohms in Greece :-)
Regards, Joerg
http://www.analogconsultants.com/
No it doesn't. One of the very big contract manufacturers in the UK prefers to use bare copper with a protective organic coating for lead-free. They have no problems with this.
Too much gold is a bad thing, as it forms a brittle inter-metallic compound with tin which can reduce the reliability of the solder joint.
See for example
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or
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John
Are you sure you haven't got that backwards?
Cheers, James
Check this out. I found an online calculator to help convert between the two. Pretty cool, eh?
Rick
Opps, forgot the link...
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Rick
all the coatings have pros and cons
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-Lasse
the two. Pretty cool, eh?
Now that's handy! Now if they only had a calculator for going the other way...
Cheers, James Arthur
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