Long live the desktop!



Inside the new Mac Pro

In the land of nerds — Apple nerds, anyway — Apple’s obsession in recent years with iPhones, iPads, and the iOS operating system for small devices has been disturbing. Sure, nerds have iPhones and iPads and love them. But real computers are for getting work done. Apple was accused — rightly — of neglecting its iMac desktop line of computers and squandering the work of its engineers on consumer doodads designed for distraction and entertainment rather than for getting work done.

Even worse, for a while Apple was saying that it wanted to make its operating system for desktops — Mac OS — more like iOS. That was horrifying. iOS is creepy, really. Its “apps” have no standard user interface, which guarantees that most apps are quirky, gawky, silly-looking, unusable, and aimed at adolescent needs and tastes. Much worse, iOS devices take control away from the device’s owner in the interest of security. For security, that makes sense. But nerds don’t like being locked out of their own computer.

Last year, Apple’s CEO, Tim Cook, tried to reassure the nerds that Apple wasn’t turning its back on serious computers. The reaction from nerds was skeptical: Harumph. So you say. Prove it.

Apple just proved it. The specifications of the new iMac Pro are breathtaking, way beyond what even the most optimistic desktop nerd might have hoped for. The iMac Pro is to be available in December. Prices start at $4,999. That may seem like a lot of money, but for people who use their computers to make money and who need all the desktop power they can get — for video work, for example — the iMac Pro actually is surprisingly cheap and easy to cost-justify.

Will I buy one? Absolutely not. I don’t need that much computing power on my desktop. But I do need a real computer on my desktop. It’s a certainty that the technical advances inside the iMac Pro will trickle down to the iMacs in the $2,000 range.

Best of all, the release of such a high-end workstation means that Apple can’t neglect its workstation operating system — Mac OS. I’m guessing that the new version of Mac OS that Apple will release in the fall will make up for some lost time. Sure, nerds want their iMacs to talk to their iPads. But we most definitely don’t want a desktop OS that is dumbed down and cartoonized and childproofed the way iOS is.

I’ve been using Macintoshes since 1986, more than thirty years. The drama of Apple’s evolution has been fascinating to watch. Apple just proved (I hope) that the company is not going to devolve into a company that only makes cool, expensive toys. They’re going to continue to make real computers and do superb engineering.

Now make us some cars, Apple! I won’t be able to afford one, but I can’t wait to see what kind of car you make.

Why I went back to Firefox


Unwanted video was the last straw. Few things are more irksome than going to a web site and having a grating and useless video start playing. It’s increasingly common. Unwanted video slows everything down. And if you’re on a cellular or satellite connection, unwanted video eats up your data faster than anything.

As far as I could determine, with Google Chrome there was no way to block aggressive video. There are a couple of Chrome plug-ins that are supposed to suppress unwanted video, but they didn’t work. I’m hardly the only person who despises unwanted video. In techie forums where this is discussed, the consensus seems to be that Google sided with the devil — advertisers and rude web sites — and gave the money people what they want at the expense of what we little people want. It’s Google after all. So it’s not surprising.

Part of the problem with unwanted video is not only stopping it from automatically playing, but also stopping it from being automatically “preloaded” and wasting data. A Firefox extension named “Disable HTML5 Autoplay,” though it is in an early version, seems to work. Using that extension with Firefox was the only way I’ve been able to block the extremely aggressive video that Huffington Post pushes at you.

You might ask why anyone would even go to Huffington Post anymore, now that it’s in a tailspin of click bait headlines and cheap content. The reason is that, though Huffington Post rarely anymore has anything fit to read, I do want to see how they’re playing the news. Huffington Post emphasizes leftwing anger items the same way Drudge Report emphasizes rightwing anger items. They’re useful as gauges of the propaganda du jour and what is being fed to the masses.

Firefox clearly is working hard to position itself as the anti-corporate, pro-privacy web browser. Chrome’s dominance will be hard to break, but I suspect that we will increasingly see some migration toward Firefox.

Review: Husqvarna weed-eater on wheels


Eight years ago, after I cleared an acre of elderly pine trees for the abbey and had the stumps removed, it was hard to imagine ever having a weed problem. It was all bare red dirt, scary to look at. I was eager for anything — anything — to grow. Now there are weeds, and lots of them.

Last fall, we bought a Husqvarna chain saw, and Ken was very pleased with it. This spring, an old weed-eater needed replacing. I went to the local hardware store in Walnut Cove with the intention of buying a Husqvarna handheld weed-eater. But outside the front door of the store I saw a Husqvarna HU 675WT weed-eater on wheels, and I was intrigued.

For one, it’s more powerful than a handheld weed-eater, with a four-cycle Briggs & Stratton engine. For two, it uses a much heavier cutting cord. After a demo from Mr. Bill, who owns the store, I bought it. With its handles folded over, it actually fit into the back of the Smart car.

Ken was skeptical. I was afraid I’d make a mistake. Some weeks later, though, he said that it was growing on him.

The weed-eater is almost perfectly balanced, on high wheels. That will easily deceive you into thinking the machine is weightless, which it isn’t. When working on a slope, it feels a bit heavy, but it’s manageable. One of the best things about the weed-eater is the heavy cutting cord, several times the diameter of handheld weed-eaters. Even better, the cord is not on a spool. The cutting cord comes in pre-cut loops. If the cord gets ripped up, it takes about 30 seconds to loop in a new cord. No fussing with a cord spool!

Blackberries are tough. They’re the biggest weed challenge here. This thing will rip down blackberry stalks with ease — though the blackberries retaliate by tearing up the cutting cord if you try to move too fast.

The right side of the machine has a safety guard. On the left side, the cutting cord is exposed. If the cutting cord hits the base of a young tree, it will tear the bark off in no time. So it’s important, when trimming close to your beloved trees and shrubs, to always keep the guard side of the machine turned toward the tree.

The abbey also has a small battery-powered weed-eater for small jobs such as trimming grass. Thus it takes three machines to manage the grass and weeds here — a 28-inch Snapper riding mower, and two sizes of weed-eaters.

If the summer is as rainy as the spring has been, the machines are going to get quite a workout.

Switched to satellite


The abbey is in a hidden little valley well off the beaten path, down in the woods. We wouldn’t have it any other way. But such isolation means that getting on the Internet is a problem.

For the past eight years, the abbey’s solution has been Verizon Wireless. I rigged up a nerdish system in the attic — Verizon “air cards” connected to directional antennas, with the antennas pointed toward the nearest Verizon tower (which is almost four miles away). In such a fringe coverage area, the Internet connection is slow and unreliable. The signal has to pass through woods, so performance is even worse when the trees grow new leaves in the spring. The trees have almost finished growing new leaves. We were fed up. Ken suggested that I ought to look at satellite again. He taunted me, actually. He’ll be spending the summer as a park ranger in the middle of nowhere in Alaska, in a park service cabin with only solar power and a satellite setup for Internet that he said probably will be faster than the abbey’s. I couldn’t let that challenge go, could I?

What I found was that, just a few months ago (December 2016) HughesNet launched an enormous new satellite, EchoStar 19. The satellite was built in every nerd’s favorite California suburb — Palo Alto. The satellite was launched from Cape Canaveral on top of an Atlas rocket. After a couple of months of testing, HughesNet began to offer (in March 2017) a broadband service that they call “Gen 5” or “Generation 5,” promising true broadband speeds of 25 Mbps. Not only that, I found their pricing plan entirely fair — unlike Verizon pricing, which is clearly structured to provide as little as possible for prices right at the peak of what the market will bear. I bought HughesNet’s 30 GB per month plan. That plan includes 50 GB per month of off-peak data (2 a.m. until 8 a.m.) free. If you exceed the 30 GB per month, HughesNet does not block service or scalp you for overage gigabytes. Instead they throttle your speeds (to 1 to 3 Mbps) for the remainder of the month, at no cost. Or you can buy reasonably priced “tokens” to get more high speed data. The tokens never expire. When you buy extra data, you get to keep it until you’ve used it all.

Bye-bye Verizon. And good riddance.

In the past, I had avoided satellite because HughesNet has consistently gotten poor reviews for its service. With a new satellite, a new transceiver-router box, and new network infrastructure, I’m counting on HughesNet making a comeback and improving their reputation. If the satellite service here at the abbey continues to be as good as it has been since the system was installed yesterday, I will be extremely happy. I’ll post a review after a month or so.

There is one penalty with satellite Internet service that cannot be avoided. Service must be provided from a geosynchronous satellite. That means that the satellite orbits the earth at exactly the same rate at which the earth rotates. Thus the satellite is always in the same location in the sky, so that you can point a dish at it. The distance from earth required for geosynchronous orbit is just over 26,000 miles. A radio signal to the satellite must travel 46,000 miles — up and down again. Thus the speed of light causes a delay, or “latency,” in response times. That delay is a significant and often noticeable fraction of a second. But will I put up with the latency to get true broadband at a reasonable price? You bet.

So far, download speeds are exceeding HughesNet’s promise of 25 Mbps. We’re consistently getting 45 Mbps. Not only is that fast, it’s the fastest Internet connection I’ve ever used — here in the sticks! Of course, this is a new satellite, probably lightly loaded while HughesNet is adding customers. The speeds probably will drop. Still, I’m counting on HughesNet keeping their 25 Mbps promise. HughesNet is boasting that this satellite service is the first satellite service to meet the FCC’s definition of broadband. So I think that there are regulatory reasons why HughesNet must keep the speed up if they want to advertise it as true broadband.

I hold an Extra-class amateur radio license. I’m accustomed to working with communications apparatus. One of the things that frustrated me, in trying to make do with Verizon Wireless, was the cheapness and flimsiness of the consumer-level electronic components. Piddly “air cards” are about the size of a thumb drive. Their antenna connectors (when they even have one) are tiny, fragile, and unreliable. By comparison, look at the photo below of the feedhorn on the HughesNet satellite dish. The feedhorn is nicely made at a commercial (as opposed to consumer) standard. It has a nice, snug, coaxial connector. Also notice the heat sink (the fins on the bottom). That means it gets warm. If it gets warm, that means there is some power in it. The installer said that the feedhorn operates on a 45 volts DC that is fed to the feedhorn on the coaxial cable.

Yup, we can stream video now. And I’m actually paying less than what I’ve been paying Verizon, keeping in mind that I had both a 3G and a 4G air card for Verizon, because the service was so unreliable that a backup was needed. The new backup method will be tethering the iPhone. But I’m hoping that this HughesNet service is going to remain both fast and reliable.


⬆︎ Ken buries the coaxial cable while the installer sets up the dish


⬆︎ The dish’s feedhorn


⬆︎ The installer used an app to aim the dish. The readout on the phone is coming from the satellite and represents the signal strength as seen from the satellite. This number rose to about 120 after the dish was properly aimed.


⬆︎ The system comes with one box, the HT2000W, which is both the satellite transceiver and the WIFI router.

Buying eyeglasses on line

A couple of weeks ago, while waiting for an appointment with the eye doctor, I listened to a couple of people ordering glasses from the glasses-fitting technician. I was stunned at the prices they were being quoted, easily $600.

There are rumors about why eyeglasses have gotten so expensive, but from Googling I found it difficult to confirm or deny the rumors — which have to do with lack of competition as big players buy up more and more of the market. If I’m not mistaken, places like Walmart and Costco have better prices, and there’s not a total monopoly. But I like to buy things on line.

I first bought glasses on line two years ago. After doing some reading, I decided that EyeBuyDirect probably was the way to go. I was completely happy with their glasses and their service, so I recently ordered new glasses from them based on my new prescription. If you’re thinking of ordering glasses on line, you should do your own research, because this is probably a fast-changing marketplace.

A simple pair of blue-filtering reading glasses cost me $70. A fancier pair of driving glasses with “adaptive” lenses cost $160. The first pair of glasses I ever had were three-way “progressive” lenses, and I never got used to them. I found it too awkward to tilt my head to whatever angle was appropriate for seeing near or far. I quickly learned that I prefer to have multiple pairs of glasses close to where I use them, with a separate pair of glasses for reading, for driving, and for working at the computer. I only wear glasses when I’m reading or driving, because my vision is still remarkably good.

To order glasses on line, you’ll pick a frame (based on photos and prices of the frames, which works fine for me) and then choose the features you want for the lenses. You enter in the numbers from the prescription that you got from your eye doctor. In one to two weeks, your glasses will arrive in the mail.

There is one piece of information you need for ordering glasses on line that isn’t part of your prescription. That’s the distance between the center of your pupils, measured in millimeters. The first time I ordered glasses, I made my own measurement in front of a mirror (I measured 67mm). This time the glasses technician made the measurement for me, even though I wasn’t buying glasses at the eye doctor’s office. The technician measured 64mm. I was off by 3mm, which is less than an eighth of a inch, so I didn’t do too badly. In any case, I believe that number is more critical for greater levels of correction than I need.

I would say that the main drawback of ordering glasses on line is that you don’t get the benefit of a technician adjusting the frames to better fit your nose and temples. You might be able to do this yourself after watching some YouTube videos.

It’s always something

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The guilty capacitor


I can tell from the reader logs for this blog that y’all are preoccupied with the political situation, as am I. But please bear with me as I try to get oriented to the terrifying new political reality and distract myself with things that are closer to home and relatively unimportant.

For almost two months, I had hardly turned the organ on, because I was busy with politics. But just over a week ago, resolved to work up some Christmas music, I sat down to do a little shopping through a stack of music to figure out a short Christmas program. As I was playing, the organ started smoking. It continued to play, but smoke rolled out from under the keyboards. I turned the organ off, of course, and called the Rodgers technician.

Some types of electronic components can last virtually forever. But electrolytic capacitors don’t last forever. They contain a liquid, and eventually this liquid can leak. The liquid conducts electricity, and as it leaks out onto a circuit board, electricity gets conducted into all sorts of places that electricity ought not to go. Things smoke. Boards get fried.

The cause of the smoking organ was a leaky capacitor on the power supply board for the organ’s lighting systems. The heat melted a small hole in the board, and the bottom of the board was blackened. The board was damaged, but it was repairable. A replacement board would cost well over $1,000 from Rodgers, so repair was the way to go.

It’s a pleasure to watch a good electronics technician at work. The Rodgers technician who serves most of North Carolina is incredibly good at diagnosing problems (he’s seen everything over the years), and he’s very good at getting out his soldering iron and doing component-level repairs.

After about an hour, the organ was back up and running. He cleaned up the blackened board, replaced the offending capacitor, and replaced three identical capacitors elsewhere in the organ as a preventive measure.

What keeps us sane after a political disaster like the election of a dangerous con man to the U.S. presidency? Music, of course. Cats, for sure. And what I call the literary labor of novel-writing.

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The yellow jumper wire replaces a trace on the board that was melted by the capacitor burnout.

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Testing the voltage output after repairs

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Pulled out from the wall, back panel removed for electronic surgery

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Two new capacitors where old, leak-prone capacitors used to be

Road trip to Green Bank

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I’ve made some fine road trips in my day, in several countries. But I believe the road trip that I just returned from was one of the best ever. The trip was mostly on back roads from Stokes County, North Carolina, through the Blue Ridge Mountains into the New River Valley, thence into West Virginia to Green Bank.

My primary mission was to see the Green Bank radio telescope, the largest fully steerable radio telescope in the world. To go see the telescope seemed like a no-brainer, since it’s not that far away and since I’m a space nerd and a radio nerd. Getting there was half the fun.

I am not well traveled in West Virginia. We all know that parts of West Virginia are environmental sacrifice zones, chiefly for coal but also for natural gas. This road trip took me through a very different part of West Virginia — a still-natural and well-preserved countryside, much of it in national forests.

The wildflowers! The trip would have been worthwhile for the wildflowers alone. The roadsides and pastures were dense with wildflowers at the peak of summer. I was green with envy at the rainfall the area has had and how green everything was. In between the mountains, the ridges of which tend to run north to south, are wide valleys, extremely fertile. It’s perfect pasture land. And, judging from the size of the farmhouses, that pastureland made lots of farmers rich. These are not the small subsistence farms that were much more common in the American southeast.

Morning temperatures ranged from 68 to 75 degrees F. Afternoons might have been warmer except that clouds and showers seem to descend on the area pretty much every summer day. There was hardly any traffic on the roads. I drove with the windows down, enjoying that sense of freedom (in my Smart car) that car commercials always try to give — the idea that there’s no one on the road but you. The road trip was almost freeway-free. GPS did the navigating, but when presented with alternate routes I always chose the routes that followed rivers or that avoided populated areas.

The telescope is fascinating. I have been plotting the third book of the Ursa Major series, and in book 3 Jake and Phaedrus actually will find themselves at Green Bank, having gotten there by mule, for some action scenes that require the use of the telescope, though the telescope had been idle since the calamity struck (in the first novel) that wiped out 6 billion of the earth’s population and returned the survivors to the Iron Age.

The telescope is extremely sensitive to radio interference. It’s located inside the National Radio Quiet Zone, and the surrounding mountains also keep out radio interference. I lost my cellular signal 50 miles south of Green Bank. Upon arriving in Green Bank, hoping to find accommodations to spend the night there (there are no such accommodations), I stopped at the public library, hoping to use WIFI. They library staff told me that they’re not permitted to have WIFI because it would interfere with the telescope. If you visit Green Bank, try to arrive early in the day, do the tour, and then leave yourself time to head east toward Charlottesville or south toward Blacksburg, if you want something to eat or a place to sleep — or Internet access.

The tour takes an hour. You’ll start in the auditorium with an undemanding scientific briefing from your tour guide, and then a video. Then you’ll board a bus and be driven to a point near the base of the telescope. The tour guide will explain that the bus uses a diesel engine, because the spark plugs in a gas engine would create radio interference.

It’s hard from photographs to grasp the scale of the telescope. It’s 485 feet tall, 60 percent higher than the Statue of Liberty. The size of the dish is almost three acres. It weighs 8,500 tons, but it can be rotated and tilted (azimuth and elevation) with extreme precision.

There were nine people in the tour group I was in. Six of them were Dutch, two were British, and I was the only American. Why are Americans so incurious? Once again I was reminded why I have so often said that I have much more in common with the average European than with the average American. I returned to Trump country — Wytheville, Virginia, to spend the night.

Driving south toward Wytheville, about an hour from Green Bank, I got cellular service again. A text message arrived from Ken, who was holding down the fort at the abbey: “Four foot long snake has been relocated. Raccoons ate all orchard apples. Lily is well. .15 Inches rain. Hope you’re having fun.”

Wytheville was not much fun, to tell you the truth. Wytheville was once a sleepy place, but major new roads have turned it into a travel hub. Watching an ill-mannered, incredibly unhealthy bunch of Americans descend on a free Ramada Inn breakfast made me want to emigrate to Scotland as quick as I could pack my bags. I was conflicted about where to have dinner in Wytheville. The many restaurants were mostly about “family” food, or they were chain restaurants. I finally settled on the Sagebrush Steakhouse & Saloon. It appeared to be locally owned, and I liked the “saloon” part of the name. I confess that I had a filet mignon with garlic mashed potatoes and broccoli. It was superb. I felt as though I was having supper in a well-run Irish pub. If you ever find yourself in Wytheville, I recommend it.

Places like Fries, Virginia, are depressing. Fries is a classic example of a textile town that is now poor, culturally and otherwise. In other words, Trump country. In 1940, its population was 1,555. It’s now 469. Years ago, most of the people worked in the cotton mill, which was powered by a hydroelectric dam on the New River. The dam is still there; the old mill has been demolished. The mill closed in 1989 and put 1,700 people out of work. The roads around Fries are a classic, and depressing, example of Trump-supporter impoverishment. The housing is dilapidated, with junk in the yards and dogs on chains. The nasty little churches seem to be the few remaining businesses. One of the churches even seemed aware of the fact that it’s just a business selling heavenly comfort into the squalor. “Under same management for over 2,000 years,” said the church’s sign out front. Harrumph.

But how different the economy of West Virginia used to be! Not only were there prosperous farmers living on fertile land, there were many resorts, most having to do with springs. The grandest resort I saw was Sweet Springs, designed by Thomas Jefferson and once a hangout of the rich and famous.

Upon arriving home, I said to Ken that the road trip put me in mind of thoughts he describes in Trespassing Across America. Ken uses much more refined and nuanced language, but this road trip made me both love and hate America. Wonders such as the Green Bank Telescope are a reminder of what Americans have accomplished. Sweet Springs — not to mention those beautiful farms and the national forest — is a reminder of what America once was and promised to be. But now there are Trump signs amid the ruins of our old economy. As for the new economy in places this remote, it appears mostly to have to do with big highways and the sublimely ugly service and retail development that springs up along those highways. A brush with Europeans is a reminder of just how ignorant and culturally impoverished most Americans are.

You know what I think would make this country great again? An educated and informed population, the opposite of what Donald Trump and his political party stand for. I got the heck out of Fries and Wytheville and hurried back to the abbey, a tiny Fox-free bubble of books and imagination in the foothills.

So why will Jake and Phaedrus find themselves at Green Bank in book 3 of the Ursa Major series? A calamity threatens — an act of sabotage that would destroy an incoming ship loaded with E.T. VIP’s from the galactic federation. Unless Jake and Phaedrus can succeed in transmitting a radio signal out to the vicinity of Neptune to prevent the detonation, earth will get itself into yet another deep pickle, as earth is wont to do.

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The tour guide uses a Faraday cage and a spectrum analyzer to show how even a digital camera can create radio interference.

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The nicest of the many churches I passed

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What else is new? Outside money is always seeking to turn what’s left of natural America into a sacrifice zone.

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Sagebrush Steakhouse & Saloon at Wytheville

Do you really want to know what time it is?

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There is an old saying that has become known as Segal’s law: A man with a clock always knows what time it is. A man with two clocks always wonders what time it is.

This is a nerd post. Sorry, non-nerds.

Normal people, I’m going to guess, are perfectly OK if their clocks are within a minute or two or three of the correct time. To nerds — and to much of the technology that you use every day — even a single second is an eternity.

Let’s look at a little history.

When I was a child, the two most accurate clocks that I can remember were the clock on our kitchen stove and the electric clock that sat on the shelf above my grandmother’s rocking chair. Because I was a nerd child, I found out how those clocks kept time. They did it by counting the 60 Hertz cycles on the AC (alternating current) power line. Even in the 1950s, power companies had pretty good methods of keeping the alternating current that powers our homes alternating at a stable rate. So, to be accurate, those electric clocks only needed to be able to count those 60 oscillations per second on the electric power line with a synchronous motor.

Time and frequency are very closely related. You can confidently say that something oscillates so many times a second only if you know, very precisely, how long a second is. By 1920 or so, our technologies had reached the level at which the accurate measurement of time and frequency — and the coordination of time and frequency from one place to another — became very important to economic and technical development. One of the first ways of solving this problem was with special radio stations operated by the National Bureau of Standards. Shortwave radio listeners were very familiar with these broadcasts: “At the tone the time will be, X hours, Y minutes, Coordinated Universal Time.” These broadcasts continue today, though GPS has now made the broadcasts largely obsolete. We’ll talk about GPS in a second.

Nerds knew (though the general public didn’t care) that those radio broadcasts were disseminating not only a time standard but also a frequency standard. If you have a shortwave receiver than can be tuned to 10 Mhz (Mhz = megahertz, or a million cycles per second), you’ll hear a click once per second and a voice announcing the time once a minute. But the frequency of the carrier signal also is very precisely controlled. The frequency of the broadcast is as close to precisely 10 Mhz as modern technology can get it, and that’s pretty close. So if you had a need to accurately measure frequencies, you could tune some special (and very expensive) radio equipment to these radio broadcasts and use the frequency of the carrier signal as a 10 Mhz frequency standard. Other expensive equipment, called frequency counters, if given access to a highly accurate 10 Mhz reference signal, could accurately measure all other frequencies.

Do you remember in the 1980s when “quartz” watches became a big deal? Quartz oscillators have been in use at least since the 1920s, but in the 1980s it became possible to make quartz oscillators small enough and cheap enough to fit inside a watch. Oscillator is a nerd word, but it refers to a simple circuit that produces a sine wave (alternating current) at a certain frequency. When you turned the dial on an old radio, you were changing the frequency at which the receiver oscillates. You were tuned to a station when the receiver oscillated at the same rate as the transmitter of the station that you wanted to listen to. The receiver used a variable frequency oscillator, because turning a dial changes the frequency.

A quartz crystal oscillates at a known and fairly stable frequency. Let’s say that there’s a quartz crystal in your watch oscillating at a frequency of 32,768 cycles per second. An easy circuit to build into a watch is a “divide by 2” circuit. If you send the signal through a “divide by 2” circuit, you get half the frequency, or 16,384. Divide it again and you get 8,192. If you do this division 15 times, you get a signal that is pulsing at once per second. Use that signal to move the second hand, and you’ve got a watch.

Though quartz watches are about ten times more accurate than mechanical watches, they’re still far too inaccurate for demanding requirements. Over time they drift, probably by seconds per week. Oscillators based on the properties of rubidium or caesium are more accurate than quartz, and both are used in expensive time and frequency equipment.

But, these days, how does our technology handle the need for highly accurate time and frequency at a reasonable cost? These days it’s done with GPS.

How GPS works is fascinating in itself, but let’s save that for another day. The important thing is that for GPS to work, the GPS satellites must send an extremely accurate time signal to the GPS receiver — your smart phone, for example. If your GPS device displays the time, you can count on it to be highly accurate.

These days, anyone who needs an accurate time and frequency standard uses special GPS receivers. Cell phone towers need both accurate time and frequency. Electric power generating stations now use GPS timing to coordinate the “phase” of the current on the power grid. The computer systems used by banks, or by stock trading systems, require accurate timing and are using GPS references. Most 911 call centers now use GPS references to ensure accurate time records, which are required by regulations.

Nerds like me often have apparatus at home for accurate time and frequency measurement. The cheapest way to go is to buy on eBay equipment that is considered obsolete by commercial users but which still works perfectly well.

In the top photo, a GPS receiver is tracking satellites and displaying the time. The output labeled “10 Mhz” is carrying a 10 Mhz sine wave “disciplined” by the GPS time signal so that the 10 Mhz reference signal can be trusted to be highly accurate. In the lower photo, that same 10 Mhz is being sent to my Hewlett Packard 5335A frequency counter, which is saying, “Yup, that looks like 10 Mhz, when compared with my built-in reference oscillator.” However, the GPS 10 Mhz reference signal is more reliable than the frequency counter’s internal oscillator, though that Hewlett Packard internal 10 Mhz oscillator is very good. The frequency counter has a plug in the back for a 10 Mhz external reference signal. So if the cable from the 10 Mhz output on the GPS device is plugged into the back of the HP frequency counter, then the frequency counter will use GPS as its frequency reference rather than the less accurate internal oscillator.

So, if you were at my house and wanted to know what time it is, I might suggest that you ignore the clock on the kitchen stove and go look at the GPS clock. It will be right within a millionth of a second, and that’s good enough for a nerd, most of the time.

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Low-cost microscope photography

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Those of you who aren’t retired must think that I have entirely too much time on my hands. So please pardon me for another nerd post. And do keep in mind the importance of always doing and learning new things for as long as we’re living.

My interest in microscopy is closely related to my interest in photography. It’s a new way to see things and a new way to photograph things. When my Nikon Model S microscope was made back in the 1970s, doing photography through a microscope was a pretty expensive operation. These days you can do a passably good job of it with a smart phone and a $14 bracket device that holds the smart phone’s camera lens over the microscope’s eyepiece.

And though my microscope is equipped only for viewing semi-transparent objects with light that passes up from below and through the specimen, I’ve figured out that I can get remarkably good images by aiming a light source down at the object from above. I’ll do more of this kind of photography as I have time. Tiny flowers, which are plentiful this time of year, look great under a microscope. I’ll have some photos of those in the coming weeks. The three-dimensional nature of objects such as flowers presents a bit of a problem in microscopy, because a microscope’s depth of field is very tiny. That is, only a part of a specimen can be in focus at a time. But I’m guessing that the old-fashioned pressing of flowers inside a book, protected by parchment paper, would flatten the flower, making focusing much easier while also preserving much of the color and detail of the flower.

The device that attaches the smart phone to the microscope also will work with a telescope. I have a telescope. So naturally I’ll have to see what kind of photos I can get through the telescope as well. Every photographer wants pictures of an enormous moon rising behind a landscape. To get the moon to be truly, unnaturally, dramatically huge, you need a really long lens — or a telescope. I’ll see what I can do.

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Nikon Model S microscope

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Click on the photos for high-resolution versions.


This is a nerd post. I apologize to non-nerds, who surely will find it boring. Perhaps you’d be so kind as to come back in a day or two, after I’ve moved on to another subject? 🙂

I admit it. I have a fetish for scientific instruments. Partly it’s because they’re complicated, and I like things that are complicated. And partly it’s because well-engineered instruments, to me, are indistinguishable from art. I’ve annoyed a few artist friends, actually, by suggesting that technology may constitute much of the art of the 20th Century. Just look at the high-resolution photos of this instrument to appreciate how photogenic and elegant it is.

I certainly cannot afford scientific instruments when they’re new, nor do I have a use for most of them. But, thanks to eBay, many old instruments fall into the hands of liquidators and junk dealers who put them up for auction. Old instruments, if they continue to work, never totally lose their value, as far as I can tell. Working instruments regardless of age are still useful to hobbyists. And there are many collectors. Collectors, like me, seem to always have an eye for superb design.

My Nikon fetish came about from my Nikon cameras. Again, I cannot afford professional Nikon cameras when they’re new. The camera bodies alone, no lenses included, can cost $7,000 or more. But, after professional photographers move to the newer models, older professional cameras become affordable on eBay. I have a Nikon D1X that is now my backup camera. My current camera is a Nikon D2X. As soon as the D3 professional cameras are affordable (another year or two?) I will upgrade to a D3. There is nothing like the solid feel of a Nikon professional camera — heavy, complicated, sophisticated, no nonsense. The design is superb. The camera soon becomes a part of you.

The vintage Nikon microscopes caught my eye because of their classic design and the astounding quality of the manufacturing. Do I really need a microscope? No. But they make great educational toys. I always disliked biology lab in college (biology courses were required back then), and I often had a very hard time seeing in the microscope what we were supposed to be seeing. But I still remember the basic techniques of making slides and using a microscope.

The Nikon Model S microscopes were made during the 1960s and 1970s. The Nikon Model S must have been the first Japanese microscope to make its way into the world market. Previously, German microscopes were the rule. The Model S was highly configurable, with interchangeable parts. There were different stages, different condensers, different lighting sources, and of course a wide range of eyepieces and objective lenses. Professionals would never use a mirror-lighted microscope anymore, but they’re good for collectors because the mirror goes right on working.

The history of the Nikon company is interesting. The company has been around since 1917. They hired a bunch of German engineers and started making optical products. During World War II, Nikon made optical ordnance, as well as binoculars, bomb sights, and telescopes. After the war they started concentrating on cameras, and the rest is history. If it had been possible to win World War II with fine instruments superbly built, Germany and Japan would have beaten the daylights out of the Allies. Instead the Allies won the war with, um, instruments that were more blunt.

Many of the Nikon Model S microscopes had a flaw that has held down their value. The fine focus mechanism (in some models) used a nylon gear that, over time, shrank and cracked. This was a serious mistake by Nikon; they weren’t stingy in the parts they used. But apparently the appeal of nylon was that nylon gears didn’t have to be lubricated. Though the microscopes came with a 25-year warranty, getting the parts to repair the fine-focus mechanism has become increasingly difficult. Luckily, not all Model S microscopes used the coarse-focus and fine-focus knobs that were coaxial. Instead, the coarse- and fine-focus knobs are separate, one in front of the other, and they do not have the problem with a nylon gear. Fortunately, that’s the type of microscope I bought. I had done the research and knew what to watch out for. The manual that came with my microscope says that it is a Model SBR. I have never been able to find, on-line, a manual for the Model S microscopes with the non-coaxial focus knobs. If any collectors have Googled their way to this page and are curious about how the manuals differ, please leave a comment. But you can see the difference in the photos. There are coarse-focus and fine-focus knobs on both sides of the microscope. The fine-focus knob has a scale engraved on it, and its travel is limited to 2mm.

I suspect that my microscope was used for metallurgy, because the wooden case (yep, I got the wooden case as well) included the manual for the Nikon EPI-illuminator, which attaches below the head of the microscope and illuminates the specimen from above. Unfortunately, the EPI-illuminator was not included with my microscope, though I have the manual if any collectors need it.

The microscope is in excellent working condition and appears to have been lightly used. The photos were taken with a Nikon D2X camera with a 28-85mm AF lens.


Update: A later post on episcopic illumination can be found here.


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Update:

I’ve had several requests for scans of the Nikon EPI-Illuminator manual. These four scans are the complete manual.

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