Jeff Duntemann's Contrapositive Diary Rotating Header Image

ham radio

Daywander

hatchetman.jpgWell, as a fair number of people have told me, the logo Carol and I saw the other day was the “hatchet man” icon of Insane Clown Posse, a hip-hop duo from Detroit that I’ve never heard and probably won’t. Key to finding the figure online is knowing that what he’s holding isn’t a map or a piece of paper but a hatchet. (In fact, it looks a lot more like a meat cleaver.) There’s also a girl-version of the icon, with a ponytail, but what we saw on the gate of a pickup truck was almost precisely what I show above left.

We had a relatively small gathering last night, but that was all right, as there were few enough of us to all sit on the two couches and talk about everything from dogs to SF to classic aircraft of the Strategic Air Command. We spoke of that lunatic Lt. Col. Bud Holland, whose lifelong ambition appears to have been to roll a B-52. (Detailed discussion here.) He tried, he failed, and you can see a video of the results here. Eric Bowersox and Sabrina Hoyt brought some Mountain Dew Throwback, made with real sugar instead of corn leavins’, and the original product artwork on the cans. There were intermittent thunderstorms all afternoon, but we had enough time between microcells to grill a batch of smoked brats and Ranch Food Direct burgers. By sheer coincidence both Mike Reith and Peggy Sargent brought cream puffs, and it had been so long since I’d had one that I’d mostly forgotten what cream puffs were. That memory came back in a big hurry, heh.

Alas, the thunderstorms prevented me from getting any Field Day time in yesterday, and with less than an hour remaining in the contest and yet another thunderboomer passing overhead as I write, I doubt I’ll get any time in this year at all. I created what I had hoped to be a low-profile inverted vee, and in truth, when I told people I had antenna off the back deck, several people looked and just didn’t see it, when when I was pointing right at it. It’s designed to be portable, and is attached to the deck railing with bungee cords. I’ll try to get a couple of days’ contacts with it, then roll it up and put it back in the garage.

There was more bear action yesterday. Late afternoon, our doorbell rang, and it was our new neighbors from across the street. Heather and Glen had gone for a walk with their two small boys, aged two and four, and left their garage door open. When they returned, sho’nuff, a bear was in their garage ransacking their garbage can. Heather asked to bring her boys inside, but about then Glen came back and said he’d driven the bear off by throwing rocks at it, after which it vanished up the street and ran between two other houses. (Glen’s an Army officer. Spend some time in Iraq and bears lose a lot of their mystique.) I’m guessing it was the same bear I saw yesterday about lunchtime, eating dog food down in our gully near our back door. It seems a little too comfortable with people and a little too willing to be out and around during the day to stay here, and if it comes back too much we’re going to have to put a call in and see if it can be relocated.

Lots of leftovers from last night, and I’ll be grilling Ranch Food Direct burgers again this evening if the rain will just stop for half an hour. The West is getting soaked this year. Our local reservoirs are full, and western Nebraska’s massive Lake McConaughy is refilling (after a 9-year drought that the doomsayers warned would be permanent) at a rate of two feet per week. When we first saw it we marveled at the broad sand beaches, which were not in fact beaches at all but recently exposed lake bottom. It was about 30% full when we first saw it several years ago. It’s now over 80% full and the water level is rising fast. (Note the end of the curve on the graph, and then see this graph to get a sense for the insane amount of water flowing into it this year.) We hope to take a long weekend up there before the summer’s over.

This coming week should be fairly peaceful. I intend to do some fiction writing and perhaps even finish an experiment I have on the bench downstairs, concerning how well IN23A microwave diodes serve as AM BCB detectors. What I know of detector theory tells me that such detectors should be socko. We’ll find out–that’s what science is for.

Daywander

newfawn.jpgIt’s fawn season again, and yesterday we saw a mother deer leading a fawn that was no bigger than Jackie, if perhaps a little taller. Figure that: A deer the size of a bichon. The poor thing can’t be more than a day or two old, and it’s wobbling unsteadily around the First Curve on Stanwell St., where teenagers roar by in their parents’ elephantine Escalades and probably wouldn’t even notice if they had small animals wedged in their grilles. (We’re mostly thankful that they don’t miss the curve and plow through my office window.) Last night about 8 or so, mom had gone off somewhere, and junior was simply lying on our neighbor’s mulch, about six feet from the pavement. It wasn’t as obvious as it could be, but there are much better hiding places in the area. I guess we can think of it as evolution in action.

BrianCarolRingDazzle.jpg

Our nephew Brian was out for a few days last week, and we all went down to the Garden of the Gods for a vigorous walk around the rock formations. I took a photo of Brian and Carol and something very weird happened: A dazzle from one of Carol’s rings just happened to hit the camera the moment the shutter snapped. Green Lantern must have that problem a lot, but this is the first time I’ve seen it from Carol.

My low-key inverted-vee antenna should be up and running off the back deck by Field Day, and will be 32 feet on each leg. That will get me the 20 meter band and up, and given that I’m feeding it with a short run (~10′) of open wire line through an MFJ Versa Tuner 2, I may get 40 as well. I’ll certainly try.

I’m still testing EPub readers. This morning, at Jim Strickland’s noodging, I installed the Barnes & Noble Desktop Reader. Not a bad item, but as with all the readers I’ve tested so far, doesn’t quite get it right. The presentation on my test files has been pretty good so far, but this time the software does use the title tag, and thus puts up only half of the Beyschlag ebook’s title. Also, it puts my test books up in two-column format, and I still haven’t figured out how to control the column settings. Neither of my two test books with cover images show their covers as thumbnails in the library pane. To its credit, the reader renders PDF documents pretty well, though of course there’s no metadata and thus no display of title or author.

Most annoying is the User Guide button, which brings up a longwinded sales pitch but no user guide. I assume you have to sign up for a B&N account to get the user guide, and I will at some point, but probably not today. I do understand that the product is designed to work tightly with B&N’s online bookstore and won’t slam them too hard for that integration, but basic “here’s how to do it” information should be there long before the sales pitches begin.

Nobody’s perfect, but the winner so far is FBReader, even though it inexplicably displays my copyright notices in ancient Greek. We’ll get there. Just not as soon as I’d like.

Odd Lots

  • The rate of toxoplasmosis infection in a given nation appears correlated to the level of neuroticism in that nation. I’ve mentioned toxo before, but it appears that we have better numbers now, and that the UK is nowhere near 50% infected, as the source I quoted in 2003 implied. France, well, now…
  • Here’s a nice piece that explains why the atmospheric CO2 measurements taken atop Mauna Loa are accurate. And here is NOAA’s explanation of how they do it.
  • Bruce Baker sent a link to an article describing how a few scraps of odd film allowed some dogged engineers to re-create the long-lost pallophotophone technology (later known as RCA Photophone), and by doing so give voice to 1920’s recordings of Thomas Edison speaking affectionately about his friend Henry Ford.
  • This weekend is ARRL Field Day, in which ham radio ops head out to the hinterlands to see how well they can get up to radio speed from a dead stop, using portable (not mains) power, from a place not previously set up for radio gear. I’ll be trekking out to my back deck and working the world on an inverted vee, draining 829Bs (Diet Mountain Dew over ice in peanut butter jars) Saturday afternoon, and showing all my geek friends how it works that evening during one of our semiregular geek parties.
  • We can look forward to the Roman Missal on iBooks soon. But will the priest process down the center aisle holding an iPad over his head?
  • I’ve been testing Windows-based EPub-capable reader apps for the last week or so, and guess what: They all suck. Bigtime. Why is it so hard to render reflowable documents that are basically HTML-in-a-sack?
  • If you’ve seen The Music Man as often as I have, you’ll remember how there’s trouble in River City, because the kids are memorizing jokes out of Captain Billy’s Whizbang. Well, I’d long thought that Meredith Willson had made it up, but not so: I found a scan of a 1921 issue of Captain Billy’s Whizbang (which is now in the public domain) and put it up in my pub directory so you can see it too. (Note: It’s a 15 MB .cbr.) My reaction? It’s not very funny, but in a world without Lileks, I guess people laughed at whatever they had on hand.
  • Ok, there’s a little profanity in it (like that’s unusual in Slashdot comments?) but damn, I like this one.

Odd Lots

  • From the Words-I-Didn’t-Know-Until-Yesterday Department: Fixie, a fixed-gear bicycle; i.e., a bike in which the pedals always move with the rear wheel and coasting is impossible. Fixies are currently the rage among hipsters in stylish cities. It sounds deranged to me, but I lack the hipster gene and value my knees, so what do I know?
  • From Aki Peltonen comes a link to probably the best volcano blog I’ve ever seen. Great photos, interesting analysis, and reasonably courteous comments. (Boy, you don’t see that everywhere!)
  • While we’re talking volcanoes, how are the sunsets in the UK? Denmark? Any personal reports from readers here?
  • Many have sent me a link to the Panoramic Wi-Fi Camera, a fascinating gadget that consists of 20 cantennas arranged in a vertical line on a frame that spins 360 degrees horizontally. Spin the device, and a netbook builds a panoramic image of the 2.4 GHz field in the immediate vicinity. Watch the videos. Fascinating on its own merits, and pay attention to what happens when somebody throws a cup of coffee into a nearby microwave oven: The oven blinds the camera to everything else. For all the tooth-gnashing we hear over cellphone radiation, microwave oven RF leakage never seems to get a whisper.
  • This should surprise no one: Google’s Street View carcams have also been wardriving. There’s less to this than meets the eye (there was a project, now defunct, doing this in 2002) but it’s yet another reason I don’t power-up my Wi-Fi access point unless I need it for some reason. (My house has Cat5E in the walls, and I use PowerLine bricks for high-speed Net access in odd corners.)
  • Dave Schmarder N2DS has given his homebrew radio site a major upgrade and its own domain, so even if you saw it a few years ago, do take another look. Gorgeous work.
  • We blew through the range of SDHC Flash memory cards in record time: 32 GB cards are now in the supportable $60-$80 range…and 32GB is as big as they get. We did this in four years. Admittedly, SDHC was a cheap’n’easy hack, but hell, what kind of damfool memory standard only increases capacity by 16X? (Even SDXC, which takes us to 2 TB, should have gone much farther.) My guess: Standards authors don’t want to be wrong about future advances in hardware, and certainly don’t want to be a drag on future innovations by being too explicit about how hardware is supposed to work ten or twelve years on. I can see both sides. That doesn’t make it any less annoying.
  • From Michael Covington comes a pointer to a 1952 riff on beer and ham radio, and a glimpse of what cash-poor radio guys dreamed of the year I was born. I’ve never met anybody who ever had such a rack (the radios, the radios!) but beer was and remains very big in radio shacks to this day. K1NSS is the cartoonist behind the Dash books, about a dog who does ham radio. (I found him last year while researching names for our current puppy…)

Steampunk Home-Made Tubes…and Transistors!

tennis1.jpgWhile ragchewing with Joe Flamini earlier today, we got on the topic of whether or not it would be possible to make a usable transistor in your basement. It’s not a cakewalk, but a fair number of people have made their own vacuum tubes at home. I myself have made a sort of point-contact diode using a chunk of galena (lead sulphide) crystal and a piece of #44 wire–it’s what the old guys used to call a cat’s whisker detector. Like a lot of guys, I added a second whisker and thought it might become a point-contact transistor, but I didn’t know how to test it. (And that was in 1964.)

There’s a kind of early junction transistor called a “meltback” that starts with a small germanium bar. You heat one end until it melts a little, and as it hardens and recrystallizes after heat is removed, P-dopants gather somehow in the zone between the melted and unmelted germanium, and what results is an NPN transistor. I read years ago of somebody making meltback transistors in his basement, but I can’t find the reference now. I guess the hard part is just laying hands on a piece of germanium with both dopants in it. This article describes a number of ways that transistors are made, including the meltback method. None of them seem difficult from a lab technique standpoint, but there’s always the question of just where you get a little indium when you need it.

While researching the question I came across the Web site of H. P. Friedrichs AC7ZL, who wrote a book some years ago about making tubes and transistors at home. The book is called Instruments of Amplification, and used copies are available for about $25 on Amazon. I don’t have it yet, but I want to call your attention to the author’s online photo albums, which show some of the devices that he’s built. They’re beautifully photographed, and definitely show some steampunk influence. Here’s Album 1, and Album 2.

A fair number of people were stumbling around in the dark pursuing solid-state active devices as early as 1910; here’s a good overview. So not only was it possible for the Edwardians to make transistors, some actually came pretty close to doing it. The problem was not even access to materials–pure germanium had been available since the late 1880s–but simply that the physics was still obscure. A suitably intuitive scientist who understood electricity as well as it was understood in 1890 could have worked out PN junction physics. The fact that nobody did could have been simple bad luck: The right guy with the right background and the right obsessions working in the right lab with the right tools and the right materials just didn’t turn up.

While we talking steampunk, few are aware that a purely steam-powered biplane flew successfully in the early 1930s. It had a interesting characteristic: It was quiet. Internal combustion is nothing more than a continuous series of explosions inside a piston. Generate your pressure some other way, and the sound level goes way down. There’s some period b/w silent footage on YouTube. The engine could be quickly and easily reversed, though it’s not clear to me how valuable that would be in a biplane.

Steam-powered aircraft interest me because there’s nothing essentially electrical about a steam engine. In my novel The Cunning Blood I suggested that all aircraft on Hell (a prison planet seeded with nanomachines that homed in on and destroyed electrical conductors) would be either Diesel or turbojet powered, simply because I didn’t think you could make a steam engine that was both powerful enough and light enough to fly. I guess I was wrong.

Heh. I love to be wrong!

Harry L. Helms 1952-2009

I got word the other day that Harry L. Helms W5HLH had died this past Sunday. Harry was a friend for over 20 years, and we met regularly at trade shows including the Borland conferences and ABA/BEA, just to touch base and trade ideas. He and I had a lot in common: We were both longtime hams, we both liked classic radio gear, shortwave listening, and publishing. (We were also within a few weeks of the same age.) He was the co-founder of HighText Publishing in Solana Beach, California, and the author of a lot of books worth reading, including Shortwave Listening Guidebook (1993), How to Tune the Secret Shortwave Spectrum (1981), Top Secret Tourism (2007) and Inside the Shadow Government (2003), which may be the scariest book I’ve ever read. He published Andrew Yoder’s Pirate Radio (1996) which is best-of-breed on the history of that insane little cross-current in the mostly placid waters of the radio broadcasting industry.

His passing was nothing out of the blue: He had blogged about his struggle with cancer for several years, and displayed a species of courage in the face of imminent death that I hope I can summon when my own time comes. His last months were spent in his home town in South Carolina, with his wife and family, and his dogs and cats all around him, and if we all have to make that final leap into the unknown, I’d be hard-pressed to think of a better way to do it.

Harry had a healthy scientific mind, and while not religious, he told me he was open to the possibility that death is not the end of all things. He enjoyed uncovering the hidden and the secretive and the overlooked (see Top Secret Tourism for a travel guide to all the places the government would just as soon nobody knew about) and I have an intuition that he was looking forward to seeing “what was out there.” In one of our last exchanges some months ago, I made an outrageous suggestion, about which I won’t say more unless something remarkable happens.

We’ve got his books, and for the time being, that’s remarkable enough for me. W5HLH DE K7JPD / TNKS GUD LK ES 73 SK.

Fall? Fall? QTH Fall?

We set a cold record for this date last night, after several days of sleet and snow. Tonight it may get down to 18 degrees here and set another record. This morning we heard that there is now 15″ of snow in North Platte, Nebraska, a favorite town on our well-trodden route from here to Chicago.

I asked the local squirrels what they thought of all this. The squirrels pointed to the well-chewed pine cones all over the sidewalk and scattered across my back deck and said, “Long, cold, and early–cantcha read the signs?” Carol and I have never seen so many gnawed-on pine cones lying around; QBit has brought a few into the house to stash for later. (So much for Evo dog food.)

Summer ended early here, and fall lasted about two weeks. I’m going to try and wake our snow blower from hibernation tomorrow, as we may need it sooner than we thought. Our garage is insulated, and I’m going to try and sort out my fire alarm conflict in the next couple of weeks (before it gets too damned cold to work up in the attic) so that I can start using my attic dipole this winter. Cold nights mean good, quiet propagation on the low bands, even when there aren’t any sunspots. That done, I’m gonna QSO party like it’s 1974, because when I go outside, that’s sure as hell what it feels like.

We’re going to rent Ice Age and Ice Age II to appease the Climate Gods: Hey guys, we’re sorry for claiming that we’re controlling you now. Some of us know better. And…Tennessee would be that way…

Out, Damned Spots! Out, I Say!

Just my luck: I get a decent dipole strung in the attic, and the sun gets even quieter than it was earlier this summer, when a flurry of tiny sunspots (and one lonely one I might promote from “tiny” to “small”) led everyone to shout that the solar minimum was over. Not so. A few weeks ago, 2009 pushed into the top ten years of sunspot-less days since 1900. Spaceweather tells me that we’ve now seen 182 spotless days this year so far, pushing past 1996 into position #8 on the No-Spot Parade. (See the graph covering complete years here.) At 40 in a row, we’re in very rarefied statistical territory, even at solar minima. And if we make it to the end of August without any spots, we could see a full spotless calendar month, which is even rarer.

The next milestone comes after 18 more spotless days, when 2009 hits 200 and pushes past tied years 1911 and 1923 into spot (as it were) #6. We need 59 more spotless days this year to surpass 1954 and reach #4. We may just possibly do that, but I’m predicting that that’s as far as 2009 will get, since there are, after all, only 133 days left this year. But yikes! This is shaping up to be a minimum like nothing seen since 1911-1913.

It’s been a cool, wet summer in Colorado Springs and, in fact, a cool, wet summer in a lot of places north of poor Texas. Maybe it’s a coincidence and maybe it isn’t. A quiet Sun is a cooler Sun, and we know far, far less about its effect on climate than we’re willing to admit. In the meantime, well, sure, I’d like to work Tuvalu on three watts into a hairpin too–but 70 degree summer days and full reservoirs are not shabby compensation.

Odd Lots

  • One of the most remarkable photos of a volcanic eruption ever taken apparently happened by sheer chance, when the ISS passed over the Kuril Islands just as the Sarychev Peak volcano let loose. The rising plume literally punched a near-circular hole in the cloud cover.
  • Just in case you happen to see a nuclear weapon go off, having one of these in your pocket would be handy to quantify things. (Thanks to Pete Albrecht for the pointer.)
  • From Bruce Baker comes a pointer to a NYT article about the perils of being an outsourcee for an unscrupulous publisher. And so much for our textbooks being created by experts with advanced degrees.
  • John Cleese’s lighthearted but still informative documentary “Wine for the Confused” can now be seen on Hulu, at the cost of a few Toyota commercials. I’m good with that–and in complete agreement with Cleese that knowing good wine from great wine is not automatic, and in fact knowing good wine from bad takes more effort than most would think. Don’t miss it. (Thanks to Roy Harvey for letting me know it was there; I saw it on TV a couple of years ago and much enjoyed it.)
  • We may gasp at 64 GB thumb drives now, but storage technologies coming to market in the next few years will make 1 TB thumb drives not only possible but commonplace. (Thanks to Frank Glover for the link.)
  • The annual amateur radio Field Day event happens this weekend, from 1800 zulu on Saturday to 2100 on Sunday. I’ve got the radios boxed up, and will be experimenting with a interesting rotatable dipole made from a pair of AN-45G collapsible military whip antennas, on top of a pipe mast made of four 5′ sections of 3/8″ pipe mounted on my ancient telescope pipe base. The rotator is my right hand, turning a greased 2″ pipe joint on its own threads. I’ll describe the dipole with photos if it works; if it doesn’t work I’ll admit failure and quietly forget about it. But if you’ll be on the air, I’ll be working solo from a nearby campground as K7JPD. Listen for me.
  • From the Too Weird To Be True but True Anyway File: The woman who may well become our first Hispanic supreme court justice stated quite flatly in her Princeton University senior thesis that “…in Spanish we do not have adjectives. A noun is described with a preposition.” I’m a Polish-German-Irish-French ubermongrel who last took Spanish in 1973, and even I know better than that. So…can I be on the Supreme Court instead?

Odd Lots

  • My Web article on how I designed my workshop has just been aggregated on the Make Blog.
  • Here is the best summary of sunspot-less days I’ve yet seen. We may be coming out of a freakish-high period of solar activity; five of the ten most intense solar cycles ever recorded have occurred in the last 50-odd years.
  • Even NASA admits that our near-record solar minimum may get even deeper. I guess I don’t need to build that 6M vertical any time soon. (Thanks to Mark Moss for the link.)
  • On the other hand, the DX can be had, with some–heh!–effort. In fact, some guys in Germany recently bounced a radio signal off of Venus and heard the echo. They used the same 2.4 GHz radio frequency as Wi-Fi–just with 6 KW of power. No word on antennas or ERP, though the words “big” and “parabolic” come to mind.
  • Print-on-demand meets the magazine business with MagCloud. Basically, the magazine is printed when you order it. All pages are in full color, printed using the HP Indigo technology, with a saddle binding. The price is still steep: 20c per page, giving you a 48 page mag for $9.60. Of course, that’s all content and no ads, so it’s not utterly insane when you consider that a lot of modern magazines are lucky to have 48 pages of Real Stuff. The system works like Lulu for the most part, and if you have the need to publish a short, full-color booklet of some kind it might be worth a look. (Thanks to Jim Dodd for the link.)
  • Pete Albrecht sent a link to some WWII posters, and the interesting one is about not using broadcast receivers. Few people know that nearly all ordinary radio receivers are also very low-level radio transmitters, courtesy of the local oscillator or oscillators in the frequency conversion stages. It’s possible to detect superhet receivers at considerable distance using a good directional antenna, and this was evidently done during the War. The BBC also used to do this (and may still, for all I know) to enforce receiver licensing rules, by sending a truck around towns listening for local oscillators and logging street addresses. (I learned this from the UK pub Meccano Magazine circa 1962.)
  • It’s the not the fat. It’s the high-fructose corn-syrup. Here’s another brick in the edifice of evidence. (Thanks to Frank Glover for the link.)
  • And finally, a food pyramid that I can get behind.