Friday, August 12, 2011

Tin Whiskers and Nuclear Missiles

Lead is considered by experts to be a poison. I say it is "considered" a poison because while some "far better qualified than I" organizations which claim that as little as 10 micrograms of lead per deciliter of blood (μg/dL) is harmful (that's 1/100,000 of a gram per liter of blood). I guess this stuff is HIGHLY toxic!

I've been handling lead in the form of solder for over 35 years, and show no signs or symptoms of lead poisoning. (Typically solder is 60% lead, 40% tin). I think lead might be poisonous if you eat it, although I've known kids that grew up quite healthy, who in their childhood used to peal lead based paint chips off the school room walls and eat it! I'm fairly certain that if you inject molten lead directly into your bloodstream it would not be a good thing.

Well, I say that lead is a wee bit less toxic than some would report it to be - but honestly, the symptoms are typically balding, headaches, abdominal pain, memory loss, kidney failure, and weakness, pain, or tingling in the extremities. It seems to me that with folks my age - most of those "symptoms" apply - even if we haven't played with solder. That being said - having played with lead most of my life, I only have occasional abdominal pain when I eat Jalapeños, show no sign of balding, and the only weakness, pain, and headaches I have can be directly attributed to a hard, stressful day at work, or forgetting to put on my glasses.

Nevertheless, because of these warnings of dire tragedy (the sky is falling), lead is being reduced in landfills, by reducing the amount used in electronics production. In short - newer "lead free" solders are being used nowdays which are harder to solder (requires more heat - aka less energy efficient methods), and after some time developes "tin whiskers" on them which can affect radio frequency equipment and high speed computer systems adversely. So much for progress.

As an interesting side note- lead based solder has also been banned from use in plumbing. I find this especially interesting, as the word plumbing comes from the Latin root word Plumbus, which is the Latin word for lead. Funny how plumbers don't use plumbus anymore because of fear based government regulation. In short - if you are afraid of touching lead - wear gloves.

Politically speaking - (stepping up onto my political podium):
Tin whiskers is a VERY REAL problem that proponents of RoHS compliance are afraid to discuss, because it is far more dangerous than the supposed lead poisoning they are fighting to stop.

Tin whiskers are the natural chemical result of crystalline growth of the metal tin in the absence of lead. "RoHS compliance" - an international push to get rid of lead in landfills has caused electronics manufacturers to curb the use of lead, which is now creating more of a tin whisker problem in the electronics world. It has been shown that Tin Whiskers was the cause of at least one $250,000,000 satellite to go bad in space (Galaxy 4) and are expected to cause even more problems. I have also seen reports from Government Agencies that deal with Nuclear facilities that say several nuclear systems have suffered from the effects of Tin Whiskers.

Tin whiskers can take place in the confines of space, and unseen inside the packaging of transistors and integrated circuits. Tin whiskers, due to RoHS compliance, are now able to be found in any kind of electronics anywhere in the world, including Military Weapons and Nuclear Plants, and the brakes on the car you drive use electronics.

So when the Nuclear plant 20 miles from you, goes Fukishima, or the nuclear missile accidentally launches and lands and blows up in your home town and kills millions of people - you can blame it on the "save mother earth" people who are afraid of putting the lead back where it came from - the earth - because it might leach out and get in your water, and make me grow bald by the time I'm 80 years.

If you want to know more about Tin Whiskers, or Electronics in general - visit ElectronicsTheory.Com

Thursday, August 11, 2011

IBM PC - Remember When?

How many of you recall the hokey IBM ads with Charlie Chaplain? Ah yes, I remember it like it was yesterday. They used the slapstick comedian Chaplain because they wanted to show that using a computer was so easy, even a bumbling idiot could do it. At a mere $3000 (2 months wages for the average household at the time) you too could own a “home” computer.

Fast forward – there is now a computer in almost every household in America, and even what we then thought of as “third world” countries like South Africa have moved out of the dark ages and into the digital age. The dream of a world wide web is nearly that. Still, there are places even in the good old USA that don't have internet (I have a friend who lives on a high mountain top that doesn't even get good cell coverage), but with services like Wildblue and Hughesnet, you can be connected to the internet from almost anywhere.

I find it amazing, looking back at those badly done commercials to conceive that as of Tomorrow – the IBM PC turns 30 years old, and alas Charlie Chaplain may not be the only one breaking out a cane today.

To learn more about Computers and Electronics - go to

Monday, August 8, 2011

Standards - and Why we NEED to Standardize Them!

We are all expected to live by them, but what are they? Dictionary definitions give little help. A standard is a flag, but no two flags are the same size, shape, or color. A standard is an established norm or requirement about technical systems, something considered by an "authority" or by general consent as the approved model, type, method, or procedure for reasons of measurement, interoperability and inter-connectivity.

Whether for legal, moral, technical, grammatical, or financial reasons - we have standards, and they should be maintained. Governments at one time thought that standards were so important, that they created departments and bureaus of standards in order to insure that certain standards were adhered to.

Imagine you go to the store to buy a pound of coffee. If each of the pounds of coffee had different weight, how would you know which pound of coffee was the best deal? If I bought a ton of raw materials, and the seller sold me a ton, but his scale was "lighter" than mine - I might only wind up with 1/2 a ton according to my scale, and not have enough raw materials to produce my products! Immagine walking into an 8 foot tall room, that was designed and built by a midget with small feet?

For more than obvious reasons - standards needed to be set. So governments went about insuring that a foot was a 12 inches, and that an inch was equal to 3 barleycorn, or roughly equal to the width of the average adult's thumb. So now an inch is an inch, and an ohm is an ohm, and a Liter is a Liter, and a cup is a cup. Now why do I bring this up?

Let us take into consideration a measurement called the cup. The cup, currently used in the United States for measurement of liquid and powdered dry goods, in United States law as being equal to 240 mL. Nice. Now get out your measureing cup, and put 10 "cups" of water into the standard 10 cup coffee pot. I'll bet you can't fit more than 7 cups into the pot before you get water all over the counter. Why is that? Well the companies selling coffee pots wanted to make more money, and surely you would pay more for a 10 cup coffee pot than for a 7 cup coffee pot, even if it did only hold (typically) 6 cups of coffee.

How can they get away with it? Easy. It is their "legal" contention that a person does not fill a coffee cup all the way up to the top, and so it is intended that the pot will hold 10 cups of coffee based on how much coffee someone puts in a cup. The only thing wrong with that is - my coffee cup, which isn't considered a big cup by most people, will be regularly filled with about 3 "coffee pot cups", and so I can only get 3 or 4 "cups" of coffee out of a 10 pot cup before it is empty! Now to me this is fraud, and they are breaking the Standard - but to them - they simply wrote a "different standard" (is that an oxymoron?)

Getting down to brass tacks, nails were measured in pennies, but the penny, depending on the year, could be made of different metals, and so has different weight. So a 10 penny nail could weigh more - or less - than 10 pennies!

What does all this have to do with electronics? Simple. Look at the Digital 'Standard" for a video signal. You go out to buy a digital television set in the united states, and it could view pictures in 4:3 or 16:9 aspect ratio, it could view a 16:9 picture squished in a 4:3 format, or a 4:3 picture stretched to fit a 16:9 screen. UGLY at best - and they call this High Definition? Speaking of High Definition - there are different standards of that. The old standard, NTSC - had 525 lines of resolution, interlaced. Modern HDTV "standards" can be anywhere from 480 lines (lower than what we had) to 1024 lines (not quite double what we had) and several versions in-between. To confuse things even more, those 480, 720, 1024 (etc) lines can either be interlaced (480i) or they can be progressively scanned (1024p).

I can't blame the broadcasters though - or even the consumer equipment manufacturers. The standards they adopted were forced on them by the FCC, who took their suggestions from the "computer industry".

Now lets consider computer standards for a moment. RS232 standard was well laid out. Signal was on pins 2 and 5, with ground on pin 1. ALWAYS. It was a 9 in D shaped connector ALWAYS. And any Male connector would fit any Female connector. ALWAYS!!! This was a standard. It never changed, and it flat worked. I have 1960's equipment I have to occasionally maintain that STILL takes input via an RS232 jack, and it is robust and just plain always works. Fast Forward to its replacement, RS422 - which using the same connector, could be using any possible configuration of the pins, depending on the manufacturer. What happened? Simple - capitalism.

You see - if something is a STANDARD, then everyone has to use it. If everyone has to use it, then you can't have a copyright on it. If you can't hold a copyright, you can't keep the competition from using it. So now your competition has the same thing you do - the only to beat them in sales is to sell more, which is hard to do when your product isn't somehow better.

So now you have a standards committee make an international standard for HTML so that all web browsers will see a web page roughly the same. Microsoft for example (not picking on them - just using them for an example), may decide that they will not quite follow the standard, but make a different standard, which of course is proprietary, and only THEIR browser (Internet Explorer) follows that standard. Then the make a program like Frontpage that writes code following their proprietary standard. When other browsers go to that site, the page doesn't come up properly. Of course to fix the problem, you as the end user, are supposed to use their proprietary browser to view their proprietary code. Standards be damned - we'll do it our way, and if you don't like it, you have to use our substandard standard anyway! This of course, forces you to use their products - sort of like a monopoly? Of course if you happen to use a Macintosh (Apple) computer, then Mac has to make a deal with Microsoft to allow them to use the Microsoft standard in the Macintosh browser (Opera). The same would apply to Linux, or any other operating system or browser that isn't owned by Microsoft.

Now like I said - Microsoft isn't the target of this article - STANDARDS is. The same can be said for inter-connectivity standards, Television Standards, and even automotive standards. Because Commercialization and Proprietary have become the catchwords, STANDARD has gone by the way side. Computer and other "technical" companies seem to think that standards are no longer important to us?!

Perhaps they are not. So I tell you what Mr Gates... Why don't you ask me for change for a dollar? You give me your STANDARD dollar (US) and I'll exchange it for my STANDARD quarters (actually 4 half inch galvanized washers). As a matter of fact - if you give me 1000 pounds of US dollars, I'll give you 1000 pounds of my "standard" quarters! But I get to use MY scale for the pounds.... just so we both know they are the same weight!

To learn more about electronic and computer standards - go to ElectronicsTheory.Com

Tuesday, August 2, 2011

Sound Enthusiest? Premier Guitar Lover - Check THIS out!

Vox Unveils New Amps:

  • AC15C2 Twin

  • TB35C1

  • TB35C2

  • Handwired Series Amps




VOX Amplification introduces the new AC15C2 Twin combo amp, the TB35C1 and TB35C2, and the elegant Handwired Series Amps.

Here's the specs:


  • AC15C2 Twin
    Similar to the AC15C1, but adds a second 12" Greenback speaker, and a larger spring reverb tank found in the AC30C2.


    It has both Normal and Top Boost channels, spring reverb, tremolo, effects loop, and foot switching. This fabulous TUBE amp design utilizes 3- 12AX7 dual triodes in the preamp, and 2- EL84 pentodes in the finals to give a sound you'll never forget.

    The classic VOX tremolo has adjustable controls for both the depth and speed. The Spring Reverb gives that deep rich sound only available from a true tube amp. With its huge dual speaker housing, the AC15C2 Twin features the robust reverb tank circuit normally found only on the AC30C2, which makes for an immense sound. Will likely sell for $1100.


  • TB35C1 and TB35C2
    VOX has linked up with amp designer Tony Bruno to create two all-tube guitar amps (TB35C1 and TB35C2). Using 4- 6V6 power tubes and a reverb section with an Accutronics spring tank, these amps give a crisp, warm sound!

    The TB35C1 & TB35C2 amplifiers alone may captivate the most strict tube enthusiast, but added to the Tony Bruno circuits - it will blow all the competition away!

    Bass Boost:
    Enhances the low end response, this is ideal to get the most full and rich sound out of your instruments.

    Macho switch:
    A foot switchable feature that gives an overall gain to the mids, keeping the tonal qualities pure and clean - an exact replication of the incoming sound!

    Master Volume bypass:
    An interesting feature is the Master Volume bypass control, which completely removes the resistance of the master volume control from the circuit, delivering a sound that will rock the house!

    Tube Reverb:
    The all-tube Reverb utilizes a custom built transformer and an Accutronics spring reverb tank circuit, capable of going from a lull to a crescendo flawlessly and linearly, providing a pure sound to provide to the finals.

    These babies are expected to go for $1600, and $1900 respectively


  • Handwired Series
    The name says it all. Carefully crafted by real people who know that the devil is in the details, the Handwired Series has the technology and ruggedness that will satisfy the best of bands. The series includes a head, four combos, and a matching extension cabinet. Using an all-tube design and the highest quality components available, this is the FINAL word on classic tube amplifiers!



    • The VOX Handwired Series is on the shelves now, and includes:
    • AC15HW1 (Handwired combo amp; Celestion G12M Greenback) - $1600

    • AC15HW1X (Handwired combo amp; Celestion Alnico Blue) - $2000

    • AC30HW2 (Handwired combo amp; Celestion G12M Greenback (x2)) - $2200

    • AC30HW2X (Handwired combo amp; Celestion Alnico Blue (x2)) - $2600

    • AC30HWHD (Handwired head) - $1750

    • V212HWX (Handwired extension cabinet; Celestion Alnico Blue (x2)) - $1500





If you want to learn MORE about Tube Amplifiers and how they work - visit ElectronicsTheory.Com

Monday, August 1, 2011

Space Station Falling to Earth !!!

The Space Station appears to be falling into the earth's atmosphere and is expected to land in the Pacific Ocean! Well, perhaps not immediately, but a Russian space official stated Wednesday that when they are finished with the behemoth International Space Station, it will be placed in a decaying orbit with plans to plunge it into the Pacific Ocean.

This isn't the first time a large space station has come to death grips with gravity. Skylab, America's first space station, fell from orbit in 1979 after six years in space, and following that, Russia sank its Mir space station in the Pacific in 2001 after 15 years in operation (it missed its target and landed in Australia).

This plan has been in the works for a long time, and this is one likely step to avoid the station becoming a very dangerous piece of space junk. The original plan was to bring it down safely into the ocean as early as 2015, however, the U.S. recently extended its useful life until at least the year 2020, and there's been talk of possibly keeping it going even longer.

Consisting of more than a dozen modules built by the U.S., Japan, Russia, Canada, and the European Space Agency, the International Space Station, clearly the biggest orbiting outpost ever built, can actually be seen from the Earth with the naked eye. It's has grown large enough to "comfortably" support up to six residents. (They should start a commune!)

If you are interested in Space, Satellite, and Electronics Technology, you should take a look at ElectronicsTheory.Com

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