- The xenon flash problem with the Raspbrry Pi 2 board has been explained reasonably well on the Foundation site, by Liz Upton. Key seems to be that U16 is not a typical SMT chip encased in black resin, but a naked BGA (Ball Grid Array) chip, which allows light to hit the chip’s silicon directly. HackaDay’s Brian Benchoff says that a cheap green laser pointer will also do it, suggesting that the wavelength of light hitting U16 matters crucially. Hey kids, this is a science fair project: What wavelengths of light trigger photoelectric emission on an exposed silicon die? (Many thanks to Michael Covington for the link.)
- Adafruit has a nice benchmark page for the Raspberry Pi 2, which also provides detailed descriptions of the differences between the new board and the older boards.
- What’s going on in the Martian atmosphere?
- There’s a single SMT chip at the heart of the Baofeng radios I described recently: The RDA1846. I would love to see this on a cape/shield for one of the popular embedded boards, especially the Raspberry Pi. Not quite a true SDR, but mighty close, and I’d guess damned useful for radio tinkering. (Thanks to Bob Fegert for the link.)
- By the way, “Baofeng” and “Pofung” are the same company. It sounds like they were trying to make “Baofeng” easier to pronounce for Westerners, but in truth I don’t think it was much of a problem to being with, and I admit I was confused when I first ran across “Pofung.”
- Norse’s real-time IP attack map is very cool in a War Games sort of way, but it takes some study to figure out what exactly it is that you’re seeing. (Thanks to Pete Albrecht for the link.)
- Here’s a nice collection of homebrew radio projects from Jim McNutt WA6OTP, with pictures and schematics. Fine work!
- An interesting short introduction to the geophysical differences between Earth’s north pole annd south pole.
- More crazy weapons, including but hardly limited to the Panjundrum. I’ve always liked the Triebflugel, which was a great idea until you had to land it, kind of like the XF-85 Goblin.
- That’s not a monkey on that marathon runner’s back. It’s a tomato-dispenser robot. I guess we’re in somebody’s vision of the future. It certainly isn’t mine.
ham radio
Odd Lots
Review: The Impossible Baofeng HTs
I bought my first ham radio handheld (“handied-talkie” or HT) back in 1977. The Standard Radio SR-C146 had five crystal-controlled channels and weighed two pounds. (No wonder they called it a “brick.”) No TT pad, no CTCSS. I don’t recall what I paid for it new, but I’m thinking $350–and that didn’t even include a charger. (I built a charger for it from scratch!) That would be about $1400 today. It was a really big deal, and I used it for almost ten years, until I bought an Icom HT at Dayton in 1986.
In truth, I never used HTs all that much except at hamfests. I’ve had 2M mobiles in various cars, and for the past 18 years or so have used an Alinco mobile rig as a base. I still have the Icom in a box somewhere, but the case is cracked and it’s been in the corner of my mind to get a new HT for almost ten years.
Then Bob Fegert mentioned the Baofeng dual-band UV-82 HT, which now sells on Amazon for $37 brand new. (I actually paid $35.) In 1977 dollars, that would have been…ten bucks. So I ordered one. While cruising the Web looking at reviews and commentary on the unit, I happened upon the Baofeng BF-888S. Amazon had those for $15. $3.85 in 1977 funds. So I bought one of those as well, just to see what a $15 HT could do.
Both radios put out 1W or 4W selectable. The UV-82 covers the 2M and 70cm bands. The BF-888S covers only the 70cm band. Well, actually not only the ham bands, which is an issue worth a little discussion here. Many commenters on the ham boards loathe these radios, for a simple reason: They claim the ham radio positioning is only a ruse, to get around FCC type acceptance.
The problem is that for use on the several business bands, the Family Radio Service (FRS), the General Mobile Radio Service (GMRS) and the Multi-Use Radio Service (MURS), a transceiver must meet certain FCC requirements and pass tests to ensure that it meets those requirements. This is called type acceptance. A type-accepted radio will transmit only where its type acceptance allows. There are other requirements that aren’t about frequency. FRS radios, for example, may not have removable antennas. Ham radio gear, on the other hand, does not require FCC type acceptance at all.
These are software-defined radios. Within a broad band of frequencies dictated by the output power amp, they can receive or transmit anywhere you want them to. A free program called CHIRP allows you to create a special-purpose database of frequencies and other settings, save it as a file, and then squirt it into the radio through a USB cable. It’s nominally illegal to use a radio like the BF-888S on FRS or GMRS, but a quick Web scan shows that it’s evidently done quite a bit. The type acceptance process takes time and money, so a radio pitched for amateur use can cost less.
The flexibility of using CHIRP to set frequencies and settings allows these radios to also act as scanners and receive public safety and weather channels. It’s possible to disable transmit on any frequency, which I did for the weather channels. (One of the downsides of the display-less BF-888S is that it’s not always obvious what frequency you’re tuned to. Mistakes are possible, and in this case may be rule violations that may cause interference.)
As 2M and 70cm radios, they’re pretty good. I can hit all the repeaters I usually reach from here, just using the “rubber duckie” antennas. Audio is clean and strong. The UV-82 has a better receiver: Weak local signals will break squelch on the UV-82 when they won’t budge the BF-888S.
There are some downsides:
- Neither radio has a squelch knob. Squelch levels are parameters that you set from the keypad (for the UV-82) or in CHIRP. This can be annoying if your noise level rises and falls for some reason, or if a weak signal is right on the edge of squelch. (The BF-888S has a button that turns squelch off while pressed, which is better than nothing.)
- The chargers are flimsy and almost weightless. I’m not sanguine about how long they’ll last, and they certainly aren’t physically stable. Nor are the chargers or charge voltages the same for the two radios.
- The antenna connectors are SMAs. I had to order some SMT-UHF adapters so that I could use my discone antenna up in the attic.
- Both radios “speak” a channel number when you move up or down the channel set. With the BF-888S this is the only reliable way to know where you’re sitting, as the numbers on the channel select knob are almost invisible.
- The UV-82 has a broadcast FM radio feature, which works fairly well but is not easy to use, especially if you switch stations a lot. (It is a little weird hearing classical music coming out of a ham radio HT.)
- Although it would be very useful, I don’t think it’s possible to control (rather than simply program) either radio through the USB cable.
Both radios have white LED flashlights built-in, for what it’s worth.
So. I’m sure a Yaesu or an Icom HT would be better in a great many ways. However, Icom HTs don’t cost $35. Given how little I use HTs, the price was irresistable. How well they will serve over time is an open question. They seem rugged enough to withstand a certain amount of outdoor rough-and-tumble. If they break (or if anything weird happens) I’ll certainly tell you here.
So far, recommended.
Cranking Up the GRC-109 R-1004
While everybody else yesterday was running around looking for foot bras and the world’s smallest volcano (more on which in the next Odd Lots) I was tidying up my shop/shack, and pulled down my AN/GRC-109 Special Forces radio system. I’ve had it since the mid-1990s, but hadn’t fired it up literally since we left Arizona in 2003. I don’t have the full list of accessories so I had to do a little lashing-up to get the R-1004 receiver connected. It didn’t disappoint me.
I have the CW-only T-784 transmitter as well. I don’t use it because I’ve largely lost my CW chops and the only guys still pounding brass are whistling along at 20+ WPM. Not having an antenna that won’t set off my security system is the other issue. (Shielding the heat sensor it triggers it is not an option due to insurance regs.) My outdoor dipole will go up as soon as we have a few leaves on the tress, whenever that actually happens.
So. What we have here is a vintage all-tube spy radio, where the spies either have stealth jeeps or very strong backs. The design came out of the CIA in the late 1940s, and was adapted for more general use in the 1950s. It was used until the end of the Vietnam War. The receiver weighs 8.75 pounds all by itself. The PP-2684 power supply will weigh you down another 25 pounds or so. (There’s a lighter, smaller power supply, the PP-2685, that I don’t have.) The receiver uses conventional 7-pin miniature battery-filament tubes in a fairly simple superhet circuit. The only glitch there is the 1L6 converter tube, which is hard to find and costs a small fortune when you find it. The 1L6 is scarce enough so that people have designed solid-state replacements for it.
The R-1004 tunes from 3 MHz to 24 MHz in three bands. Selectivity is good, hardly single-signal but a reasonable compromise for a set designed to receive both AM and CW. I had to grin at how spoiled I’ve gotten by modern digital rigs like my IC-736, which can tell you to a single cycle where you are. The dial is pretty accurate, reading bang-on for WWV at 5 and 10 MHz, but it’s a wide dial, and lacks a vernier. Sensitivity seems lower on the 12-24 MHz band. No matter; in the evenings all the action is at 12 MHz and down.
SSB was still pretty exotic when the R1004 was designed, and yet its BFO is solid enough that I didn’t have to “chase” sideband signals on 40 and 75 meters with either the tuner or the BFO knob. AM quality was good, considering that it has caps to roll off audio response past 3 KHz. I tuned the entire range from 12 MHz down to 3, stopping at the ham bands or anything else unusual. I used to do that a lot before I was licensed as WN9MQY in 1973. I was hoping to find a numbers station (are there still numbers stations?) or one of those long-extinct semi-musical beacons that I used to hear in 1965. SWBC hasn’t really changed much since 1970: Christian stations, national stations, some German and French, and a lot of things too far down in the noise to quite make out. Canadian time station CHU is no longer on 7335 KHz, but a quick Google check pointed me to its new location at 7850 KHz. I listened to an AM net on 7290, and was startled when K5MIL’s big signal came up and forced me to turn down the gain–he’s only 5 miles north of me, and running a fair bit of power.
Talk about old times, whew.
My R-1004 hasn’t seen much hard use; I’d almost call it pristine. Serial number 25. By contrast, the power supply has been around the block–or maybe the world–a few times, and when I bought it I had to do some fussy needle-file work to get the corrosion off the power connectors. It sounds goofy, but I love how this gear smells: bakelite and black rubber, with undercurrents of oil and perhaps solder flux. (Radio terroir!) If ever there were a canonical Dieselpunk radio, well, here it is. My only gripe is that my high-Z “cans” headset gave me a headache after squeezing my ears for an hour, and I really need to lash up an audio transformer to take the R-1004’s 4000 ohm output impedence down to whatever my cushy padded headset likes. I’ve done this before, but alas, the adapter unit (built into a 70s contacts case I got from Carol) is hiding somewhere.
No matter. You’ve seen my shop and my collection; it will be done. When we can manage a nerd party here sometime this summer, I’ll put it out on the deck and drop a wire over the edge if I haven’t done so already. Put the black thing up against your ear, young’un: That’s what the Internet was when I was mowing the lawn and not chasing you off of it!
New Photo of John T. Frye
Reader George Cohn sent me a photo of John T. Frye that I had not seen before. It’s from the May, 1948 issue of Radio News, which contained the second installment of his very long-running “Mac’s Service Shop” column. Assuming the photo was recent when published, Frye would have been 38.
For those who don’t recognize his name, John T. Frye was the author of the Carl & Jerry educational stories from Popular Electronics, “Phone Phunnies” from QST, and a whole metric passel of other things in other places, including two books on tube-era radio servicing that from what I can tell have passed into the public domain. See my article on Frye and his creations Carl & Jerry. I republished all 119 stories in five books several years ago (plus one new storyI wrote myself, and another one from the late George Ewing WA8WTE) and they’re still selling. Frye was a paraplegic who never walked, and how he did what he did in his life is one of the great success stories of disabled people who just didn’t let anything get them down. Legs? We don’t need no steenking legs!
Odd Lots
- Anger makes you stupid. Politics makes you angry. Do the math. (Thanks to Bob Trembley for the link.)
- Running across George O. Smith’s books while redistributing titles on one of my shelves led me to look for the most powerful vacuum tube ever produced commercially. This was the understated Eimac 8974, which contains its own vacuum pump and could hurl out two million watts in Class C. QROOOOOOOOO! You can’t drive a truck into it, but you’ll need a truck to move it. And once you get it home, your first problem will be finding 600 amps to heat the filament.
- Winter’s coming early to the West: We hit a record low here for this date yesterday night: 26 degrees. Two feet of snow fell in parts of the Dakotas, with some unofficial reports (like this one, in the appropriately named Deadwood, SD) of as much as four feet.
- The Farmer’s Almanic is predicting a truly bitchy winter this year. (Note that this is not The Old Farmer’s Almanac, which is less sanguine.) We’ve noticed that the squirrels here are busting their nuts eating acorns, which is at least as good a predictor.
- Speaking of brrrrrr: Recent research fingers the Llopango volcano in Ecuador as the triggering event of the severe global cooling of 535-536, which finished off the Western Empire via crop failures and the Plague of Justinian. It was a truly titanic eruption, hitting 6.9 on the Volcanic Explosivity Index and thus a peer of the gigapuissant Tambora. After that, well, there was nothing much to do except have the Dark Ages.
- More scary robots. Four legs seems optimal for this sort of creature, which seems to be designed to carry cargo over bad terrain. It’s pretty clear to me that drones with machine guns make better manshunyoggers.
- Most people don’t have a gut sense for what “ephemera” means, but if you want a sampling of the weirdest examples ever seen (as well as many cool and sometimes beautiful ones) prepare to spend some time on it. Don’t miss Part 2.
- Which led me to Found in Mom’s Basement, a compendium of vintage ads. Some weird, some peculiar, some creepy, much Seventies. “Guess Whose Mother Used Downy?” Mort Drucker’s tampon ads. Read the archives!
- How to deal with the highest of all high-class problems, albeit the one you’re least likely to face. (Thanks to Frank Glover for the link.)
- One of the siller analyses I’ve seen recently. Then again, it may be the case that geeks are about culture and nerds are about ideas. I actually thought that nerds were what they called us in the Seventies and geeks are what they call us now.
- From the Brutal Truth In Labeling Department. I’m in.
Odd Lots
- More or less recovered here, but oboy, do I have some catching up to do…
- Those Parallels guys are now installing dicey stuff allthehellover the disks of user Macs. They do it in connection with their poorly received Parallels Access product, and they do it whether or not you use Parallels Access. In other words, they’re preinstalling DRM for a product even when users don’t want the product. Avoid Parallels like the plague.
- This, by the way, is the same pack of tinfoil hatters who approached me to write about an early version of Parallels years ago, just after I reviewed VMWare Workstation 5 for PC Magazine. I said sure, and asked them for a review copy. They said they couldn’t give me a review copy. They just wanted me to write about it. To review it I’d have to buy it. They’ve been on my killfile ever since.
- You have to sleep to keep producing a type of brain cell that refreshes nerve myelin. Short your sleep, and you’re basically killing your brain cells. Are you ready to go to bed at 10 PM now?
- We are extremely close to having a blank Sun, having arrived at Solar Max, maybe for the second time of a two-humped peak. (If it goes officially blank tomorrow, I’ll post a separate announcement, because that would be boggling.) I didn’t even put my wire antenna out this year. What’s the point?
- We may also set a record for the latest first hurricane of the season. Two more days and it’s in the bag. TS Humberto could break the streak, and lord knows, the gang over at the Weather Channel is rooting for it. Tropical weather has been so peaceable that their Hurricane Central presenters are reduced to playing with stuffed bunnies and doing standup comedy.
- Like everybody else I get butter, potato chip grease, hand cream, and occasionally red wine on my Transformer Prime. Like most people I clean up with a soft cotton rag. However, there are other ways.
- I don’t even like motorcycles, but I would ride this in a heartbeat.
- Yet another Death Ray Skyscraper. I knew Jaguars had electrical problems. I wasn’t aware that they melt like butter. Don’t get melted Jaguar on your tablet. Even AutoMee would have trouble with that. (Thanks to Pete Albrecht for the link.)
- There are probably Horrifying Stats sites for most big cities. Here’s the Horrifying Stats site for my home town.
- CBS is gearing up to make a TV medical drama based on The Wizard of Oz . I would walk through a blizzard / For a checkup on my gizzard / If I only had a pain… (Thanks to Frank Glover for the tip.)
Odd Lots
- Have been grumpy and researching boring things lately. But leaf by niggle, the Odd Lots pile continues to grow. So you get two running.
- The Perseids are coming up. The peak will occur the night of August 11-12, but look toward the northeast after midnight any night before then (and for a few days after) and you’ll see a few. People are posting idiotic Facebook memes claiming that the Perseids are among the rarest of all meteor showers. The Perseids happen like clockwork once a year, when the Earth wanders into the trail of comet Smith-Tuttle. Virtually all meteor showers happen once a year. None are “rare.” Vet your memes, willya?
- Here’s a good quick summary of the current state of Solar Cycle 24. Doesn’t look good for Solar Cycle 25, at least if you’re a DXer. Or someone in a northern latitude.
- August 21, 2017. Nebraska. Probably the best (and certainly the closest) solar eclipse most of us will ever see again. Some friends and I will be there. Anybody wanna join us?
- Samsung’s new 1TB (!!) SSD will cost $650, and should be available soon. 1 TB. 2 ounces. Egad.
- I used graphene supercapacitors as electrical hand grenades in Ten Gentle Opportunities. If you ever find yourself in the middle of a robot zombie apocalypse, it could be a useful technique.
- So I asked, “Who wants one of these candy bars?” Crickets.
- The New York Times has sold the Boston Globe to the owner of the Red Sox, at a 93% loss. This is actually good: Newspapers should be owned and controlled by people in the areas they serve. And the Times got a billion-dollar spanking. Priceless.
- Go for it, Sherlock. Just don’t glue your fingers together.
- From Mike Bentley: A temple complex in Turkey that may be 11,500 years old, older by a significant fraction than Catal Hoyuk, which may go back to about 7,500 BC. How could primitive humans have possibly done that? No, wait…it must have been the Neanderthals. Either way: Eat your heart out, Pharaoh.
- Big Dangerous Things With Wheels. And Small Silly-Assed Things With Wheels. If that isn’t enough, here’s Part 2.
- Steve Lesser has a very nice photo of the Turtle Wax turtle statue atop a building at Madison and Ashland in Chicago. It was there until the mid-1960s, but I still don’t have crisp dates for when it was erected and when it was taken down.
- My very wealthy alma mater is cooperating with the City of Chicago to build a $173M basketball stadium for its team, all while the city is shutting down schools in poor neighborhoods for lack of money. Note to De Paul: You are filth. I will tell people you are filth for the rest of my life. You will never get a nickel out of me again.
Odd Lots
- Ars has the best article I’ve yet seen on the recent ruling in the Apple ebook price fixing trial. Insight: Publishers get less under agency than they do under wholesale, but they’re willing to accept it to keep control of pricing. Book publishing is a freaky business. This may not work out as planned for the publishers.
- Also from Ars: Weird search terms that brought readers to the Ars site. I used to publish these too, but I don’t get as many as I once did. Web search has always been a freaky business. I guess the freakiness just wanders around.
- The sunspot cycle still struggles. Cycle 24 will be freaky, and weak–even with our modern tendency to count spots that could not be detected a hundred years ago.
- Not news, but still freaky if you think about it: The Air Force tried building a flying saucer in 1956. The aliens are still laughing at us.
- Actually, the best flying saucers are all triangles. In the greater UFO freakshow, these are by far my favorites.
- There’s a quirk in the insurance industry that will allow young people to opt out of the ACA and still get health insurance–while paying much less they would buying traditional health policies under ACA. Life insurance policies often allow for accelerated payouts of benefits while the insured is still alive. My insight: Such a policy would be a way to finesse limited enrollment windows by paying for catastrophic care until enrollment opens again. (Which would be no more than ten months max.) And you thought publishing was a freaky business.
- We thought we knew how muscles work. We were wrong. Human biology is always freakier than we thought.
- As is washing your hair–in space.
- Streaming is the ultimate end of the DRM debate. Music, movies, sure. Could one stream an ebook? Of course. Would people accept such a system, or would they freak out? Well, we thought DRM for serial content was dead, too. (Book publishers have become much more aggressive against piracy lately. More tomorrow.)
- And finally, if you want freaky, consider the humble cicada killer, which vomits on its own head to keep from frying in the summer. We had them living under our driveway in Baltimore. I didn’t know what they were and they scared us a little until I called the county ag agent, who said, “They’re cicada killers, but don’t worry. They’re harmless.” I immediately called Carol at work to give her the good news. The receptionist at the clinic wrote down: “Jeff called. The things living under your driveway are psychotic killers, but don’t worry. They’re harmless.”
Odd Lots
- May 1 here in the Springs will see a high of 36, and a low of 16…with 2-4 inches of snow likely. I’m thinking I’m going to have to drain the sprinkler system yet again.
- The end must be near: Jeff spent some time fooling with a Samsung ATIV running Windows 8…and was impressed. It’s a 12″ tablet with a dockable keyboard, not unlike a bigger version of my Transformer Prime. The first thing the Best Buy sales guy showed me was how to flick away the Windows 8 UI like a bug. What remained was enough like Windows 7 to be usable.
- Alas, Office 2000 will not run on Windows 8. Nor will Office 2003. But Atlantis will. As will Libreoffice. Not sure about AbiWord.
- Something shot a hole in one of the ISS solar panels. Guys, the Universe is armed and dangerous.
- And unpredictable. There are now more spots on the Sun than I’ve seen in years. Will need to spin the dials a little later today to tell if it’s doing us any good.
- Wikipedia’s psycho editing community got on the wrong side of feminists recently, and Salon did a nice piece on “revenge editing.” Requiring that real names be published for all editors would help this problem a lot. (If I had a Wikipedia entry, I’m sure I’d be vandalized for saying this.)
- Poking around Salon led to this: We once tried to weaponize the weather. (So much for those bucolic 1950s that everybody seems to love.) Of course, the key to weaponizing the weather is knowing where to deploy your butterflies.
- Suddenly I’m seeing the word “adorable” used with what appears to be a straight face. Is this a hipster thing?
- These see-through highlighter pens were a long time coming, but they’re simply adorable.
Odd Lots
- Egad. No, egad squared: A major literary agency has asked to see the full manuscript of Ten Gentle Opportunities. The novel is done, but I still have to format it for submission and write the synopsis and logline. I’m going to be busy for a few days, that is fersure.
- IBM is taking a new slant on fluidic computers, one that operates via charged fluids. The hope is that this will allow better modeling of human brain operation. I’m skeptical, but hey, it’s a species of nanocomputer, and I’m certainly bullish on those. (Thanks to Mike Reith for the link.)
- If anybody reading this has a 3D printer, I’d like to ask: Does the extruded plastic stick to clean copper-clad PCB stock? The obvious idea is to lay down a single-slice pattern in the form of PC pads and then etch the board with the plastic as resist. I don’t see much about this online.
- From Chris Gerrib: How American radio stations got their call signs. One minor refinement: US callsigns beginning with AAA-ALZ and NAA to NZZ are not exclusively military. Amateur radio callsigns have used those prefixes for at least 35 years. (An OTA friend of mine outside Chicago got his Extra and selected AA9J as his call in, I think, 1976.)
- People always seem to be recording meteors on dash cameras. I now have a dash camera. If I put it on my dash, will I see a meteor? Or will I get my money back? (Whoops. Found it in the bushes. All finds final. No refunds.)
- Speaking of dash cameras: The manufacturer of the little sports camera I found in my bushes issued a DMCA takedown notice to a reviewer, on trademark grounds. (The DMCA has nothing to do with trademark abuse.) Hey, GoPro, Barbra is singing. Backtracking about the blunder will not help you. (Thanks to Tom Roderick for alerting me to this.)
- Salads are way more dangerous than hamburgers. Alas, you can’t grill salad until it’s done to the center.
- From Michael Covington comes a link to a story about how a Medieval copyist’s cat peed on his manuscript. The scribe drew a peeing cat on the damaged section, with an appropriate curse in Latin.
- And we think we have a junk DNA problem: Amoeba proteus has 290 billion (yes, billion) base pairs in its genome, as compared to homo sap’s piddling 2.9 billion.
- The reason all of us baby boomers didn’t die as grade schoolers may be that none of us lived in rich-guy gonzo-modern homes like these. (Why did I think that these houses were designed to ernhance estate tax revenues?)
