Book Review: “Bunch of Amateurs” by Jack Hitt

The title held a lot of promise, but the subtitle (“A Search for the American Character”) hinted at the main problem that I had with the book: the author (perhaps driven by his editor) seemed to be struggling to prove that there is some uniquely American elements to amateur science and technology. Early on, Mr. Hitt, makes the preposterous claim that “the rest of the world doesn’t have amateurs.” He goes on to write that “In Europe and on other continents, the word hints at class warfare… Amateurs may be taken seriously, but, almost by the power of the word, are kept in their place: isolated outside some pre-existing professional class, some long-standing nobility. In America, amateurs don’t stay in their place or keep to themselves.”

What a load of rubbish! This claim directly contradicts what many of us have been finding out in the quintessentially amateur world of amateur radio: as we travel around the world (in person, or via the ionosphere) we find, all around the globe, guys who have followed shockingly similar paths to ham radio. From Sudan to Switzerland, from India to Indiana, the story is much the same. And I’ll bet you’ll find similar similarities in just about every serious sci-tech hobby (astronomy, photography, etc.). To claim that there is something fundamentally exceptional about amateurism in the U.S. is, I think, ridiculous. Mr. Hitt should have spent some time looking at the amazingly diverse and vibrant world of British amateur science and technology. That alone would have prevented him from straying into these silly claims of American amateur exceptionalism.

But, all that aside, there is a lot of interesting material in the book. I liked his description of John Dobson and the amateur telescope builders. And, somewhat surprisingly, Hitt’s description of the DIY Biology movement (these guys are playing with genetics and cooking up new organisms) seemed to capture very well the creative joy and satisfaction that amateurs find when working (just for fun) on their projects. I was kind of surprised when I found myself identifying with the DIY Biology folks. Their basement labs sounded a lot like our radio shacks.

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Feynman at G-QRP Convention!

What do Richard Feynman and the G-QRP club have in common?

The answer is an annual pilgrimage to Ripponden in Yorkshire, England. The G-QRP club have their convention in a local school and Feynman went there every summer to visit his wife’s family. Here’s an interview with Feynman filmed at the Old Bridge Inn which is about a mile from where the G-QRP club gather:

Is this enough to make Ripponden the Knack Centre of England?

Regards, Alan G0RWB

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“Robert Ford — A British Radio Operator in Free Tibet…”

http://www.economist.com/news/obituary/21587201-robert-ford-british-radio-operator-free-tibet-died-september-20th-aged-90-robert-ford

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Occam’s Microcontroller

Paul, M0XPD, has what I’m sure is a wonderful article on a simple microcontroller-based rig in the current issue of our beloved SPRAT. I look forward to seeing it. And I really like the logo with William of Occam (of razor fame). I have encouraged Paul to take a break from the microcontrollers and build something discrete and analog… like a BITX!

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Big Data and the Square Kilometer Array

All of this is very interesting, but SolderSmoke readers will probably find the last ten minutes most interesting.

http://www.youtube.com/watch?v=dzlwhP5JejA

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The Society for Model and Experimental Engineers

Wow. Stop what you are doing and take a look at the four short films about a group of intrepid British knack victims. Very nicely done. Really captures the allure of the shack/workshop.

http://makezine.com/2013/06/28/the-makers-of-things-2/

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Wow! Raspberry Pi as an RF Transmitter

https://github.com/threeme3/WsprryPi

This site shows you how to use a $35 Raspberry Pi Computer as an RF transmitter for the WSPR (Weak Signal Propagation Reporting) System. All you need is a simple low pass filter and an antenna. (Oh yea, and a ham radio license.) The site says you can get 10 milliwatts out. That’s enough for WSPR! Very cool.

This looks like a real international effort:

Credits goes to Oliver Mattos and Oskar Weigl who implemented PiFM [1] based on the idea of exploiting RPi DPLL as FM transmitter. Dan MD1CLV combined this effort with WSPR encoding algorithm from F8CHK, resulting in WsprryPi a WSPR beacon for LF and MF bands. Guido PE1NNZ extended this effort with DMA based PWM modulation of fractional divider that was part of PiFM, allowing to operate the WSPR beacon also on HF and VHF bands.

For more info on WSPR: http://soldersmoke.blogspot.com/search/label/WSPR

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A Beautiful Workshop in Scotland

A nasty Coronal Mass Ejection hit our magnetic field at around 0600 UTC today. The HF bands are now in poor shape. What better time to visit a really impressive workshop in Scotland?

Ian has an interesting site: http://www.ianjohnston.com/

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Filter Pinout: P, E, B, G Explained

I few days ago I asked about the significance of the P, E, B, and G markings on my junkbox Toyo CM 455 kc filter (1969 vintage). PA3BCB — in yet another example of the power of the International Brotherhood of Electronic Wizards — was the first to provide the needed info. And in another example of IBEW awesomeness, KA0LDB noted that the markings are explained in the 1971 RSGB Handbook.

P = Plate = filter input
B = B+ = mixer B+ plus if needed or input ground
G = Grid = filter output
E = Earth = Ground

I like the switched filter arrangement presented above (from the RSGB Handbook); the 2.4 kc bandwidth is great for SSB, but a little tight for AM. I might put in a DPDT switch in the circuit so as to be able to go back to the “broad as a barn door” selectivity provided by just the 455 kc IF cans.

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Rich Arland’s Global Adventures in Wireless Electronics

Rich Arland’s SKN Station

Hi Bill:

I am writing to tell you what a GREAT book “Solder Smoke” is. I really enjoyed it and I am amazed at how similar our paths are regarding electronics, ham radio and our journeys around the world.


Although I am 16 years older than you I, too, got my start in radio at an early age: about 10, after I got nailed by my dad’s console SW/AM radio prior to a Cub Scout meeting one evening. I just had to figure out how I received a shock from that big old receiver, which led me to a life long pursuit of the elusive electron, an interesting 50 year career in ham radio, a 20 year career in the USAF (Tech Controller, AFSC: 307), and ultimately teaching vocational electronics in the State Correctional Institution at Dallas, Pa.

During my AF career I spent almost 17 years overseas: two tours in Japan (KA2AA–this was prior to recip licensing as we had the Far East Amateur Radio League in the SOFA), a three year tour at Lajes Field, Terceira Island, the Azores (CT2BH–this was prior to the Azores receiving independence from Portugal in 1976), a five and a half year tour at RAF Mildenhall, UK (G5CSU), and a brief stint in W.Germany (DA2NE) while working with 10th SF Group at Bad Tolz and SOTFE in Patch Barracks. Had 18 months in the 3rd Mobil Comm Gp in Tinker AFB, OK, and a twilight tour at Langley AFB, VA.

The three years in the Azores was from 1970-73….it was extremely difficult to obtain a ham license at that time and there were only 9 of us licensed in the entire archipelago, as I recall. I was attached to the 1936 Comm SQ, and all we had for comms to support theUS Forces Azores mission were three HF ISB shots: one to Andrews AFB, MD, one to Rota, Spain and the other to RAF Croughton, UK. During that three year period I REALLY learned about HF comm and propagation. I was on duty the day, in 1973, when “the ionosphere turned off”! WE had a SID of such magnitude that it blotted out everything, and I DO MEAN EVERYTHING! We were lucky to hear AFRTS on the hill by the MARS station! During that tour we also performed comm support for the US Navy‘s Sea Lab project on Sao Maria, which was part of the SOSUS system. Ultra cool stuff!!! On more than one occasion during a mid shift, the Comm SQ chief of maintenance, CT2BC, would snag me from tech control, and we’d go intoLajes Airways (right down the hall) and grab a Scope Control Level, point the two HUGE LPAs toward the states and work a little DX on 20M !! Definitely NOT QRP! All this under the guise of “quality control”! It pays to have friends in low places!

During my UK tour, we initially lived off-base at Bury St. Edmunds. I had a Ten-Tec PM2B and a tuner which I loaded into a chain link fence behind our house. I quickly worked Collin Turner, G3VTT, and soon became a card carrying member of the G-QRP-Club (#622) in 1979. To celebrate my 34th birthday, my wife Pat (KB3MCT) and Jo Dobbs, wife of George Dobbs, G3RJV, put together a surprise party for me after a Saturday at the RSGB convention near Birmingham. George Burt, GM3OXX along with Ronny, GM3JJG, furnished the haggis….and the single malt….needless to say we did have fun; all 25 of us packed into RJV’s home!

Hey, sorry for being long winded. Our backgrounds and travels are uniquely intertwined. Thanks for writing “Solder Smoke. I am procuring a hard copy (I read it on my Kindle) for my wife, as your insight into the “why things work the way they do” are perfect for her to help her with obtaining her Extra. I only wish I had it when I was teaching my electronics classes in prison. It would have made my job easier, that is for sure.

Stay well, and I hope we can meet one of these days. In the mean time, I have to pull my Meade ETX out of storage and start watching the sky, and finish building about four model rockets for an upcoming launch weekend here in North Georgia.


Rich Arland, K7SZ
Dacula, GA

Author: “The ARRL’s Low Power Communications, the Art and Science of QRP (all four editions)

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The Raspberry e-Bay Multi-Mode Beacon of M0XPD

From: Paul Darlington
Subject: Multi-mode QRSS beacon on the Raspberry Pi
To: “Bill Meara”
Date: Sunday, January 20, 2013, 8:32 AM

Hi Bill


Inspired by recent comment on your SolderSmoke blog, I got myself a DDS module from eBay.

Today I lashed it up to my new Raspberry Pi and now have CW and Hellschreiber pumping out on 40m.

I hope others will forgive my greedy use of the spectrum in transmitting “m0xpd :- Raspberry Pi” in Hellschreiber.


73 de Paul, m0xpd

http://m0xpd.blogspot.co.uk/2013/01/multi-mode-beacon-on-rpi.html

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Move over Altoids Tins! Legos for Raspberry Pi Case

Too bad the Raspberry Pi board is a bit too big for our beloved Altoids tins. It would have been a very fitting match: British board in a British box. A twelve year-old has solved the problem with Legos: http://blog.makezine.com/2012/06/11/lego-raspberry-pi-enclosure/
Will this lead to raids on the toy boxes of the grandchildren of SolderSmoke fans?
Billy’s RasPi is running nicely (but no Legos for him).

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Another VK3YE DSB Rig

Hi Bill

A short e-mail from across the pond. Thanks for sharing the VK3YE link, so impressed I was that I have built one.
It receives great and puts out a nice looking dsb signal, looking forward to some good qso’s, ready to improve on it as we speak and looking to make a top band and 18m version also, love the site and keep up the good work…Ian
Ian Miller
G7FFV
UK

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Report from Dover Construction Club

GM Bill,
Dover Construction Club lads all send their regards! We’re still gong strong but summer is always a bit slack.
Young Neil has built himself a HUNTER SDR receiver, the rest of us are involved on projects but often chin wagging takes preference and little gets done….. Merv is the big offender of course, not me!
I’m working on a big linear for my 160m winter fun…. using a Russian triode…. of course it will loaf along at 400W, our legal limit.
Nigel is now the other side of the country but he’s still involved and considers himself an active member. Building like mad but still not doing the important thing of bashing on with his Morse. He’s getting better and that was proved last night.
Peter came round with his new KX3 and we put it on the air….. We worked Nigel and he insisted that he did not use his morse reader….. I could be ingratious and say there may have been a little ‘porky pie’ (lie, sorry, London cockney slang!) It might have been running on the side of the bench but he didn’t look at it!
I have a KX3 on order and expect that in the next few weeks….. I’ve gone for the kit.
While on holiday my ic 7200 burst into flames….. well, filled the house with smoke! The PSU had gone to 22v and the PA board did not like it. It’s a real mess inside but surprisingly enough there are few internal problems…. a few charred caps on various boards and one 9v reg giving 8volts but the Rx still works!
The Tx works up to the PA board as well! It was insured and they have paid up so I might order a new PA board and keep that in the workshop as the rig down there.
I’ve started to downsize as well…. I have far too much gear…. I’ve got 160 Morse keys for a start and use four of them!
Sorry, in rabbit mode….. 73 for now
Ian, G3ROO and GB2SPY (oh, and KG3ROO and G0ROO)…. and DCC lads

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Valve line-up of British Homebrew Rig

A number of electro-archeologists out there have asked about the valves found in the old British homebrew rig I presented yesterday. Here you go:

Mic amp: ECC83
What I think is the modulator: EL84
Suspected oscillator: M8162 also marked as 12AT7 WA UJ
What looks like the driver: EL85
Final: QQVC3.10

I’ll try to determine the resonant frequency of the tuned circuits.

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Beautiful British Homebrew (with Valves!)

I was rummaging around the junkbox and I found this gem. I probably bought it at the Kempton Park rally in London. I think it is an AM transmitter for VHF. Maybe 6 meters? Or perhaps that British 70 MHz band? What do you guys think? Can anyone estimate the frequency from the size of the coils?

I think the workmanship is beautiful. The technique of putting the tube sockets on a copper clad board is interesting. I wonder why he did that — obviously he wasn’t afraid of metal work. Look at that cable harness work! FB! It’s too bad the builder didn’t mark it with his call.

Anyone recognize the design? Any idea when this was built? For bonus points: Who built it?

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QRP in the Country (Somerset, England)

From the folks who bring us “Hot Iron”:
—————————

Ladies and Gentlemen,
QRP in the Country will take place on Jul 15th at Upton Bridge Farm, Long Sutton, Langport, Somerset TA10 9NJ despite the weather! The cattle sheds have been cleaned and it will be indoors if the WX stays bad! The farm gate opens at 10 am so dont be put off by a little rain!
Don’t forget to bring your entries for the Ten Part Receiver Challenge! Lots of interesting things to see displayed by individuals and Clubs. There is still room for a few more ‘stalls’ if you want one.
Hope to see you, Tim Walford G3PCJ

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Good Emergency Advice from Her Majesty’s Government

I thought of this during our recent bout with the “Derecho” storm and the subsequent power outage. It is not really from HMG of course — it is actually the work of Carl, 2E0TEC. But I’m sure HMG would be on-board with the “musn’t grumble” “stiff upper lip” spirit of the poster. Now if I could only get my soldering iron to run off the solar-charged 12 volt gel cell….

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Hans Summer’s Homebrew ‘Scope

The picture right away gives you a sense of the depth of this project, and of the guy who completed it. One of my biggest mistakes in the UK was missing the opportunity to meet Han Summers, G0UPL. Check out Han’s Homebrew ‘scope project, and be sure to look around his site for other, similar adventures:


http://www.hanssummers.com/tinyscope.html

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