Digest for sci.electronics.repair@googlegroups.com - 19 updates in 4 topics

"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Feb 17 07:42PM +0800

On 17/02/2017 5:27 PM, K Wills (Shill #3) wrote:
 
>> Not an exact quote. Just google "turn stone to bread". ;)
 
> Why did you LIED and claim it was a quote when you knew it was
> not a quote?
 
Only one word in that line was changed. Fair enough in my opinion.
 
Could you turn e-waste and dates (fruit) into bread? :)
 
--
@~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!!
/ v \ Simplicity is Beauty!
/( _ )\ May the Force and farces be with you!
^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3
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"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Feb 17 07:48PM +0800


> And that is the way of the world. Nobody does anything *TO* a country economically, short of a shooting war, that the country does not invite or demand. And China is certainly no exception to this. Start at home and ask what home-grown forces are doing before whining about what the rest of the world is doing 'to you'.
 
Hong Kong does not have that many scientists as in USA. The world is
depending on these clever, smart, brilliant scientists to recycle
e-waste. :)
 
I didn't know glass has asphalt.... so it's silly to blow glasses as a
job? ;)
 
--
@~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!!
/ v \ Simplicity is Beauty!
/( _ )\ May the Force and farces be with you!
^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3
不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):
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"pfjw@aol.com" <pfjw@aol.com>: Feb 17 04:03AM -0800

On Friday, February 17, 2017 at 6:48:20 AM UTC-5, Mr. Man-wai Chang wrote:
 
> e-waste. :)
 
> I didn't know glass has asphalt.... so it's silly to blow glasses as a
> job? ;)
 
These smart, clever, brilliant scientists will solve that problem the moment that China, Africa et.al. stop buying it. Full stop.
 
Peter Wieck
Melrose Park, PA
bruce2bowser@gmail.com: Feb 17 04:43AM -0800

> And this is a surprise why? China is rapidly becoming the most polluted country, local and in general, in the history of > the planet. With a population of ~1,346,000,000 +/- and a need to "grow" the economy, a healthy environment is far, far > back in the needs list.
> Were China to consume at the same rate as the US does alone (25% of the world's total energy resources), they would use
> 125% of what the world produces in energy today - that is from all sources, coal, oil, nuclear, solar, wind, geothermal > and more. Not to mention India.
 
Yet the further renewable energy r & d goes, providing more with less.
bruce2bowser@gmail.com: Feb 17 04:57AM -0800

For example, 3% of sunshine in the Sahara desert is enough to power all of Europe.
"pfjw@aol.com" <pfjw@aol.com>: Feb 17 05:44AM -0800

> For example, 3% of sunshine in the Sahara desert is enough to power all of Europe.
 
Be careful what you wish for.
 
Today, the best solar panels at 2 square meters produce about 350 watts at high-noon. Let's be generous, and assume that this happens for all 12 hours of sunlight as every panel is on the equator. Total cost for a solar farm runs about US$2/watt, exclusive of land or storage - at utility levels. Smaller systems, or systems with substantial storage will run up to US$6/watt. All using SOTA equipment, and not race-for-the bottom junk.
 
https://en.wikipedia.org/wiki/List_of_countries_by_electricity_consumption
 
The European Union uses 2,771,000,000,000 kwh/year. To make that much power would (divided by 365 as needed each day) would require 21690802349 panels at 2 square meters each. Which would be 43,382 square km. Double that for access, cleaning, infrastructure and so forth. Comes to about 2% of the total land area of the EU.
 
Then we have storage for nights and bad days.
 
What it all comes down to is that solar power is practical under the following conditions:
 
a) Government Subsidies
b) Cheap land
c) Government Subsidies
d) Nearby infrastructure or consumers
e) Government Subsidies
 
The outside service life for a solar panel (rated to 80% of original flash rating) is about 25 years. At which point the degradation accelerates very quickly.
 
Now, a solar furnace using eutectic salts, THAT can cut the land area required by 80%, be easily scaled, and as a hybrid/cogen system has no storage issues. Couple a solar furnace with any sort of geothermal source or, for instance hydro-power, and you have a 100% renewable system that would cut the need for hydro-power by about 2/3 and have an indefinite service life. But, there is a lot of NIMBY involved with solar furnaces.
 
http://www.dailymail.co.uk/sciencetech/article-2045926/Solar-plant-generate-energy-night--glowing-lightbulb-tower-thats-hot-melt-salt.html
 
Peter Wieck
Melrose Park, PA
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Feb 17 10:46PM +0800


> Yet the further renewable energy r & d goes, providing more with less.
 
I am wondering about the POLLUTANTS that was CREATED by manufacturing
renewable energy products....
 
I am not a smart, clever, brilliant scientist, but I am being HONEST
about it. :)
 
--
@~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!!
/ v \ Simplicity is Beauty!
/( _ )\ May the Force and farces be with you!
^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3
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"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Feb 17 10:47PM +0800

> For example, 3% of sunshine in the Sahara desert is enough to power all of Europe.
 
Sandstorm? Corrosion? Night time temperature? And other factors...Would
they all affect the costs?
 
--
@~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!!
/ v \ Simplicity is Beauty!
/( _ )\ May the Force and farces be with you!
^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3
不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA):
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Allodoxaphobia <knock_yourself_out@example.net>: Feb 17 03:04PM

> For example, 3% of sunshine in the Sahara desert is enough to power all of Europe.
 
CITE!
"pfjw@aol.com" <pfjw@aol.com>: Feb 17 08:38AM -0800

On Friday, February 17, 2017 at 10:04:44 AM UTC-5, Allodoxaphobia wrote:
> On Fri, 17 Feb 2017 04:57:14 -0800 (PST), bruce2bowser@gmail.com wrote:
> > For example, 3% of sunshine in the Sahara desert is enough to power all of Europe.
 
> CITE!
 
Easy enough. The Sahara is 3.629 million mi². Or about 9,000,000 square km.
 
Solar Energy (at the equator) is about 100 watts per square foot per day. Or about 600 watts (per 8-hour day) per square meter *ON AVERAGE* world wide from about 40 degrees north and 40 degrees south.
 
2,771,000,000,000 is the EU power consumption in KW, annually.
 
Each square KM contains 1,000 x 1,000 square meters (1,000,000).
 
Do the math. The amount of energy involved is staggering, but 3% is extremely conservative, as the actual number is a fraction of a single percent. 3% would be better defined as 'available energy with today's technology'.
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Feb 17 10:29AM -0500

On 02/16/2017 02:57 PM, Jon Elson wrote:
 
> Anyway, I'll replace the transistors and burn it in for a while and see if
> it gives any more trouble.
 
> Jon
 
A whole lot of TO92s went away in the last couple of years. I bought
several thousand as a lifetime prototyping supply.
 
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
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Feb 17 10:36AM -0500

On 02/16/2017 03:59 PM, Jon Elson wrote:
> This particular one was an NPN with an ft of 1400 MHz and 1.2 pF Cob. So,
> definitely, a 2N2222 would not cut it.
 
> Jon
 
You want an MPS5179 or something like that. Rochester and folks like
that still have them. (I bought a thousand or so a couple of years ago.)
 
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
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Feb 17 10:38AM -0500

On 02/16/2017 12:46 PM, Clifford Heath wrote:
> prototyping, why not just learn to prototype in SMT? It's not that
> hard. A lot of RF things are easier because stuff is physically
> smaller.
 
SMT prototyping is about a factor of 10 slower than dead bug using
through-hole parts. Every DIP package gets you a bunch of nice strong
standoffs.
 
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
Jeff Liebermann <jeffl@cruzio.com>: Feb 16 10:45PM -0800

On Fri, 17 Feb 2017 03:37:57 +0000 (UTC), Stijn De Jong
 
>Over time, I should be able to figure out what the unique cellid of the
>microtowers is (which may be a function of their MAC address or serial
>numbers for all I know).
 
For CDMA femtocell, the unique ID is a conglomeration of:
MCC (Mobile Country Code)
SID (System ID)
NID (Network ID)
BID (Base Station ID)
 
For GSM femtocell, it's:
MCC (Mobile Country Code)
MNC (Mobile Network Code)
LAC (Location Area Code)
CID (Cell ID)
 
Stolen from:
<http://people.csail.mit.edu/bkph/other/Cellular/osm_blog>
Read the footnotes, which have some Android bugs listed.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Savageduck <savageduck1@{REMOVESPAM}me.com>: Feb 16 10:51PM -0800

>> This leads me to believe that T-Mobile, At&T, and Sprint are actually
>> roaming in my location, using the Verizon towers.
 
> That is not possible.
 
OK! In that case, I will put it bluntly; AT&T, T-Mobile, and Sprint
coverage, roaming aside, in the Lake Nacimiento area, ±13 miles West of
Paso Robles, California totally sucks. Conversely Verizon coverage is
actually quite good in the same area, particularly given that the only
towers in the area belong to Verizon.
 
--
Regards,
 
Savageduck
Lewis <g.kreme@gmail.com.dontsendmecopies>: Feb 17 06:58AM

> Paso Robles, California totally sucks. Conversely Verizon coverage is
> actually quite good in the same area, particularly given that the only
> towers in the area belong to Verizon.
 
Of course you have to choose your mobile carrier based on your own
coverage needs. Traditionally Verizon has had the largest coverage area,
though t-mobile has been making large gains in recent years.
 
I get good coverage all over Denver, but it is pretty lousy inside my
house, so I have a (free) T-mobile CellSpot that provides LTE coverage
inside the house (and almost certainly improves the coverage for my
neighbors).
 
--
Not all who wander are lost
"Carlos E. R." <robin_listas@invalid.es>: Feb 17 09:25AM +0100

On 2017-02-16 21:57, Stijn De Jong wrote:
> be, so, I'm not sure if that compass-like pointer is fluff or if there is a
> major reflection of radio waves going on off of someone's solar panel array
> or expansive windows overlooking the valley below.
 
There is no way the phone can determine the location of the tower from
the signal, the antenna is non-directional. It has to be determined from
a map of locations. Maybe the tower gives that info, I don't know.
 
--
Cheers,
Carlos E.R.
Mikko OH2HVJ <mikko.syrjalahti@nospam.fi>: Feb 17 12:02PM +0100

> 2. You know the sub-band where to expect the vendors transmissions.
> 3. You know the SID (system ID) of the vendor.
> 4. You have a map or database of the vendors service areas.
 
You could also add some LTE/UMTS module, some of these can do a network
scan with an AT-command and give you the cell id, technology, channel
number etc. of all 'visible' base station.
 
Apparently even some USB dongles can do this, so you could connect some
cheap SDR+modem+GPS to an RPi and do your magic.
 
There are also cell tower location databases like Opencellid.
 
--
mikko
"K Wills (Shill #3)" <compuelf@gmail.com>: Feb 17 03:27AM -0600

On Thu, 16 Feb 2017 22:01:08 +0800, "Mr. Man-wai Chang"
>> I'm going to go out on a limb and declare it's something you made
>> up.
 
>Not an exact quote. Just google "turn stone to bread". ;)
 
Why did you LIED and claim it was a quote when you knew it was
not a quote?
 
--
Shill #3.
Strategic Writer, Psychotronic World Dominator and FEMA camp
counselor.
https://c2.staticflickr.com/4/3618/5747904676_1e202191d3_b.jpg
All hail the taco! http://www.taconati.org/
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