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Sunday, November 13, 2011

"The Knack" on a Mysterious Island

Paul, W2IOG, sent a nice e-mail about a very early use of the term "The Knack": 1874 by Jules Verne. (What word did he use in French?). I took a look at the Wikipedia page and discovered that there was indeed quite a bit of "The Knack" on Lincoln Island:

"With the knowledge of the brilliant engineer Smith, the five are able to sustain themselves on the island, producing fire, pottery, bricks, nitroglycerin, iron, a simple electric telegraph, a home on a stony cliffside called "Granite House", and even a seaworthy ship. They also manage to figure out their geographical location."

Hello Bill,

I have been a listener to your Soldersmoke pod-casts for a couple of years now. I am also a regular reader of the blog as well as a long time victim of "The Knack". I was browsing an old book store the other day when I came across a beautifully illustrated copy of Jules Verne's book "The Mysterious Island" copyright 1920. I couldn't resist, and when I reached chapter nine of part one of the book I was really glad I had made the purchase. In the story, which takes place in 1853, castaways on an apparently uninhabited island are trying to make fire for the first time. After trying and failing to make sparks by striking stones together, two of the castaways try the following:

"Pencroft, although he had no confidence in the proceeding, then tried rubbing two pieces of dry wood together, as [primitive people] do. Certainly, the movements which he and Neb gave themselves, if they had been transformed into heat, according to the new theory, would have been enough to heat the boiler of a steamer! It came to nothing. The bits of wood became hot, to be sure, but much less so than the operators themselves.

After working an hour, Pencroft, who was in a complete state of perspiration, threw down the pieces of wood in disgust. 'I can never be made to believe that [primitive people] light their fires in this way, let them say what they will,' he exclaimed. 'I could sooner light my arms by rubbing them against each other!'

The sailor was wrong to despise the proceeding. [Primitive people] often kindle wood by means of rapid rubbing.
But every sort of wood does not answer for the purpose, and besides, there is 'the knack,' following the usual expression, and it is probable that Pencroft had not 'the knack.' "

Congratulations on getting that 17 meter rig back on the air!

Paul W2IOG


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Saturday, November 12, 2011

Sunspots! QRP DSB contacts on 17 meters


You can see here why I had so much fun in the summer of 2001 with my Azorean Homebrew QRP DSB rig. And why I am now re-CYCLING (get it?) and refurbishing the 17 meter gear that I built last cycle.

I've had the DSB rig on the air yesterday and have worked seven stations (2 watts peak DSB to a dipole).

Back to the Future! Someone on QRP-L said the SFI was recently at 180! Go Sol!

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Thursday, November 10, 2011

JBOT Amplifier Installed in Azorean DSB Rig

I've been remiss in posting to the blog, but I have a good excuse: I've been melting solder. I have working on the installation of my new Farhan-designed JBOT amplifier in my old Azorean DSB transceiver. I'm really enjoying this project, and I now see it as the first in a series. My shack has a number of creations that were built during the peak years of the last solar cycle, but have since fallen into disuse. Many of them were partially cannibalized -- usually it was the RF amplifier that was taken out. The JBOT was just what I needed. I plan to refurbish all of these rigs, adding a bit of India to each one of them. This is very much in keeping with our "International Brotherhood of Electronic Wizards" ethos.

The installation went fairly well, but with all of the ups and downs that accompany this kind of project. The amp worked fine on the bench, fed with a signal generator and into a dummy load. But of course, life got more complicated when I installed it in the rig. Yes, it took off on me. This was no fault of the amplifier -- I just needed to add some additional shielding. It is working fine now. See above. I moved it out of center stage and put it off in the corner to avoid feedback problems. More discussion of this in the next podcast (maybe this weekend).

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Sunday, November 6, 2011

Tony Sale and the Re-Building of Colossus

Steve "Snort Rosin" Smith sent us this, noting that "Tony Sale definitely had The Knack." As the Brits would say, "indeed."

http://mathdl.maa.org/mathDL/?pa=mathNews&sa=view&newsId=1195


Amazing info on Tony Sale's work here:
http://www.codesandciphers.org.uk/lorenz/index.htm

I got a kick out of this bit:

One reason for wanting to get Colossus working in 1996 was that for far too long the Americans have got away with the myth that the ENIAC was the first large-scale electronic digital calculator in the world. It was not, but they got away with it because Colossus was kept secret until the 1970s. As 1996 was the 50th anniversary o the switch-on of ENIAC I made sure that Colossus was rebuilt and working in Bletchley Park, just as it was in 1944.

There has been a stunned silence from across the water!

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Saturday, November 5, 2011

21st Century Ham Radio -- EDN Article

A few listeners sent this in. Thanks! Note the mention of AA1TJ's CFL light bulb rig!

http://www.edn.com/article/519742-Ham_radio_in_the_21st_century.php


Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Thursday, November 3, 2011

First Flight in Electric Multi-copter



Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Recreational Engineering


I like that term! "Amateur Engineering" always seemed to sound kind of scary, conjuring up images of bridges that don't quite stay in place. "Recreational Engineering" has a nicer, less ominous ring to it. I found this phrase at the end of this newspaper article on the Maker movement:

http://www.csmonitor.com/Innovation/Tech/2011/1101/Maker-Faire-Mad-science-for-the-masses/%28page%29/2


Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Wednesday, November 2, 2011

Happy Birthday Arecibo! A Tour of the Radio Telescope



Yesterday I was listening (as I do each morning at 0635) to Garrison Keillor's "Writer's Almanac." (I use a beautiful old FM broadcast receiver that Rogier out in California sent me for my birthday.) Garrison announced that it was the birthday of the Arecibo radio telescope (it opened on November 1, 1963). I wanted to post something about this on the blog, but was running a bit late and didn't get to it. This morning I was greeted by an e-mail from Ken, KG6PO, alerting me to a really magnificent video tour of the Arecibo facility. Wow. This is truly amazing. You guys are going to love this one. Three cheers for Bob Zimmerman! As I watched, I got the distinct feeling that we were visiting Bob's shack, and that the dish was his antenna!

Please spread the word about this video -- it is a real shame that it has only received 757 views. Three cheers for the guys who filmed this. Beautiful work.

Links:

http://youtu.be/kQJawfbjpxw

http://www.youtube.com/watch?v=kQJawfbjpxw

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Monday, October 31, 2011

Pumpkin Pi and JBOT Gremlins

Maria wanted to go with a mathematical theme for this year's Jack-0-Lantern. Pumpkin Pi!

I have been chasing some gremlins and banshees around my old Azores 17 meter DSB rig. The JBOT Amp worked fine into a dummy load, but of course things got a bit more complicated when I put it into the rig and connected it to an antenna. It would take off (like a banshee!) if the load was at all reactive. I think this is the result of inadequate shielding and inputs a bit too close to outputs. But it all settles down nicely when I put a transmatch in the antenna line and tune out the reactance. I may just leave it this way.

Output is a bit low -- only about 1 Watt. I realize that at 18 MHz output should be dropping a bit, but I think I should be getting more. I THINK I'm giving it the recommended 1 milliwatt input. At some point I think Farhan mentioned the possible need to experiment with the number of turns on the secondary of the output transformer....

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Sunday, October 30, 2011

Snow Static



Related to our post about my new (old!) all-boatanchors heating system (see below), yesterday I had some really horrendous static. I think it was caused by the snow. A Google search on "snow static" brought me to this video (which Gregg in Finland found "shocking""). I liked the tuner and the neon bulbs too.

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

My New Shack Heating System: Heath, Halli, Hammarlund and Drake

Temperatures dropped over the weekend and I had to fire up my new heating system for the SolderSmoke shack. See above. Heating by Heath, Halli, Hammarlund and Drake (sounds like a law firm doesn't it?). I'm happy to report that those old filaments take the chill off quite nicely while adding a nice aroma to the room, along with some very pleasing lighting effects (I especially like the green glow from the DX-100 tuning dial).

The Azores-17 DSB JBOT project is (I think) complete. And I did include a low pass filter. In keeping with the finest of ham radio traditions, now that it is cold I will go out and work on an antenna.

Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20

Saturday, October 29, 2011

Another Treasure Trove: The Royal Society's Archive

I'm a big fan (wanna-be really) of The Royal Society. In SolderSmoke 138 I noted that Isaac Newton (former Society president) seems to have had The Knack. And when I was in London one of the major perks of my job was that I occasionally got to visit the Society's headquarters. Bill Bryson recently edited a book about the Royal Society -- in his intro he noted that they have always been a very international group (just like us!)
Several readers wrote in with the happy news that the Society's 350 year archive has been placed on-line. Here it is:
http://royalsocietypublishing.org/site/authors/free-archive.xhtml


Our book: "SolderSmoke -- Global Adventures in Wireless Electronics"http://soldersmoke.com/book.htmOur coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmokeOur Book Store: http://astore.amazon.com/contracross-20
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