Dave W2DAB sent me this wonderful book. He picked up a copy at a recent Columbia University lecture on E. Howard Armstrong. Written by the notable science writer Lawrence Lessing, the book was first published in 1956. The paperback copy that Dave sent me came out in 1969; while 50 years old, my copy is in remarkably good shape.
I really liked the book. The author captures the technical achievements of Armstrong, while also describing vividly the world in which Armstrong lived. Being from the area, I especially liked Lessing’s description of New York City and the Hudson Valley in the early years of the 20th century. This was the world of my grandparents; Lessing’s book helped me understand it better.
For the radio amateur, I think the most gripping part of the book is the way Lessing describes the excitement of early radio. Armstrong was a true enthusiast for the new technology, and he was — even as a teenager — at the cutting edge. He was constantly striving to improve the technology, especially the receivers. Like us, he often became obsessed with his radio work, often forgoing sleep and missing family meals as he toiled away in his workshop. Lessing tells us of Armstrong’s astonishment and joy, when, upon inventing the regenerative receiver, he was suddenly able to clearly receive signals from distant stations that previously had been barely discernible. Realize that when he was doing that, he was the only person on the planet who was doing it. He was the inventor. He was the first.
Lessing gives us a lot of great information about Armstrong’s work as an officer in the U.S. Army Signal Corps in Paris during World War I. We learn more about how his desire to be able to detect noise from the electrical systems of enemy airplanes led him to the invention of our beloved superhet receivers. But my favorite Armstrong in WWI story involves his visit to the radio shack of the ship that was carrying him to the war. In the radio shack he found a conventional station. But he asked the operator if he happened to have one of the then new audion tubes. On the spot, Armstrong took the tube and rigged up a regenerative receiver. He and the ship’s radioman then delighted in hearing stations that had never before been audible. Amazing.
I was less interested in the sad tale of Armstrong’s legal patent battles, so I kind of skimmed through that. I’m also not much of an FM guy, so I’ll save those portions of the book for a later date.
I think this is an important book about a significant part of radio history. It is well written. It gets almost all of the technical details right (but sorry Mr. Lessing, radio waves are not composed of electrons). The book deserves a place on the shelf of all radio history libraries. If you can’t get a print copy, an online version can be downloaded here:
https://archive.org/details/in.ernet.dli.2015.189098
Thanks again to Dave W2DAB.
Category: books
SolderSmoke Podcast #208

SolderSmoke Podcast #208 is available:
http://soldersmoke.com/soldersmoke208.mp3
15 December 2018
Pete and the California fires
Bill goes to Brooklyn
2 meter simplex
A return of the trivial electric motor
Audio from Mars
HF Conditions — a real mixed bag
Pete looks back at 2018 — The Year of the SSB Transceiver — Lessons Learned
Hans Summers, the QSX and the virtues of SDR
W7ZOI’s DC Receiver Retrospective
The 1972 Solar Flare and the Vietnam War
SHAMELESS COMMERCE: Buy your gifts through the Amazon link to the upper right.
Consider SolderSmoke the book as a gift. Visit Pasta Pete’s for cooking ideas.
Don’t Build It! Sage — but unexpected — advice from Pete.
Straight Key Night approaches.
Book Reviews:
–“What is Real?” (Quantum Physics)
— RHdb by K6LHA.
Movies
“Bohemian Rhapsody”
“First Man” (Not yet!)
MAILBAG:
Steve G0FUW
Ed KC8SBV
Free Book! RHdb — The Radio Hobbyist’s Designbook by K6LHA
VU3XVR’s EMRFD TIA HB TRANSCEIVER

Ram did a beautiful job on this 40 meter rig. You can read about this project here:
https://vu3xvr.blogspot.com/2018/10/homebrew-5-watts-cw-transceiver-using.html
More Homebrew Wisdom from Frank Harris, K0IYE
In Chapter 13A, Frank Harris writes:
The Vanishing Art
The 1986 ARRL Amateur Radio Handbook reported that hardly anyone was building homebrew ham receivers…. Out of hundreds of contacts, so far I’ve worked four guys, George, K7DU, Mike, NØMF, Biz, WDØHCO and Jack, W7QQQ who were using homebrew receivers for the QSO. Three of these receivers were made from vacuum tubes. George’s receiver is a beautifully crafted instrument that looks like a commercial design from 50 years ago. All of these receivers had no trouble hearing me on 40 meter CW. I talked to one other fellow, Gil, N1FED who told me he had just finished a vacuum tube receiver. Unfortunately, it was performing so poorly he was still using his modern transceiver on the air. Gil told me he didn’t like transistors. I guess he found printed circuit boards and those pesky oscillations too much trouble. In spite of this pessimism, you CAN build transistorized receivers that work reasonably well. I built mine because I was intrigued by mysterious circuits like “balanced mixers,” “product detectors,” “cascode amplifiers” and “crystal ladder filters.” Before this project, I could recite the purposes of these circuits, but I had no “feel” for how they worked and why receivers are designed the way they are. What better way to learn than to build one?
Aside from the need to shield circuit blocks from one another, a homebrew receiver with a single big board full of discrete components has another problem. If you build the whole thing at once without buying a kit and pre-cut board, I guarantee it won’t work. To make homebrew stuff that works, you have to develop your own technology based on parts you can get and circuits you understand. Learning to think this way was difficult for me. Rather than “building a receiver,” I had to lower my sights and build one circuit at a time, e.g., “an oscillator,” “a mixer,” “an audio amplifier,” etc. Then I put the blocks together to complete my project. Some of these circuit blocks didn’t work the first time so I had to build a new block. There were various reasons the modules didn’t work. Usually, I wasn’t able to buy the exact parts used in the circuits I was copying. Or my craftsmanship or shielding wasn’t adequate. Sometimes I never did learn why one version of a circuit block was superior to another. By building my receiver using separate little shielded modules for each circuit block, I could replace a circuit block whenever I managed to build an improved version. Otherwise, I would have ruined the entire big board.
On rare occasions my circuits didn’t work because there were errors in circuit diagrams in QST magazine or in the handbooks. I found some serious errors in my 1979 ARRL Handbook and a minor one in my 1998 edition. Perfect editing is not possible, so we shouldn’t expect it.
GET THE WHOLE BOOK HERE (FREE!)
http://www.qsl.net/k0iye/
“From Crystal Sets to Sideband” — Homebrew Wisdom from Frank, K0IYE (Free Book)
Get Frank’s book here (FREE!) http://www.qsl.net/k0iye/
I’ve had Frank’s book on the blog many times over the years, but it is a book that merits repeated mention. It is filled with great advice and homebrew wisdom. I found myself looking at it again recently, and at Frank’s QRZ.com page. I came across lots of wisdom that I may have missed in earlier visits. For example:
From the QRZ page:
Foreword:
We homebrewers are nearly extinct, but there are still hundreds of us scattered around the world, some are even in the USA. Yes, there ARE American homebuilders! We’re rare, but thanks to the QRP hobby, the number is growing. Even if we homebrewers don’t change the world, I guarantee you will enjoy learning radio technology and building your own equipment.
Get Frank’s book here (FREE!) http://www.qsl.net/k0iye/
THANKS FRANK! Send Frank a thank you note: Frwharris@live.com
Tom Swift had The Knack
On Field Day: The Marine Corps Antenna Manual
Don’t let it be said that SolderSmoke made no contribution to Field Day! Here is the USMC Antenna Manual. Looks like there is lot of good info in there.
https://www.marines.mil/Portals/59/Publications/MCRP%208-10B.11.pdf?ver=2017-03-15-092827-423
Cliff Stoll — K7TA — Has THE KNACK. And a GREAT NOVA Video
Hack-A-Day had a piece on Cliff Stoll of “The Cuckoo’s Egg” and “Silicon Snake Oil” fame. I read these books years ago. I included a quote from Cliff on page 45 of the SolderSmoke book (the quote seemed to foreshadow my aversion to SDR).
I didn’t know that NOVA produced an hour-long program on Stoll’s Cuckoo’s Egg adventures. It is really good. Many of those involved play themselves in the video. Very cool. See above.
I checked Cliff’s QRZ.com page. We wrote several years ago that Cliff has THE KNACK. Note below his preference for thermatrons and the affection for Heathkits. Diagnosis confirmed.
From QRZ.com:
Peter Parker VK3YE on Vintage Gear (in his new book!)
Homebrew Hero Peter Parker has a new book on the market. I was really taken by his description of the joys of restoring older gear. Peter really nails it. Here is an excerpt:
The collection, restoration and use of historical equipment is another movement in amateur radio. The musty smell of warming dust, the heavy clunk of rotary switches and the velvet smoothness of precision tuning drives are joys of every use.
Such sensuality is absent from modern plastic-fronted, wobbly-knobbed transceivers. Old rig cabinets felt they had something in them. A kick would hurt you more than them. And etched panel markings confirmed they were built to last.
Unlike today’s dainty push buttons with stunted travel and disembodied beep, toggle switches showed you where they stood. Weight, life and play made adjusting controls for nulls and peaks (as often required) both a pleasure and occasional frustration. Even if only as mechanical backlash on a bad tuning dial, it was as if the equipment was telling you something, like a ridden horse does through its reins. Not like newer gear’s lack of tactility which is like a ‘dead fish’ handshake, all take and no give.
There are psychic as well as physical joys. The thrill of bringing neglected or dead equipment to life drives many. It’s an underestimated skill. You start with nothing and almost anything done represents progress when building from scratch. Whereas with a repair it is very easy to render something that’s 80% good completely useless with a careless drop or slip.
More about ‘Getting back into Amateur Radio’ is at
http://home.alphalink.com.au/~
& the video at https://www.youtube.com/watch?
Wonderful “QSO Today” Interview with Ian Keyser G3ROO
Ron Swanson (Nick Offerman) on Making Things and Making Mistakes
Driving home from work the other day I heard this NPR interview with the woodworking guy from the TV show “Parks and Recreation.” I’ve never seen the show, but I really liked the comments on the benefits of what we would call homebrewing:
MCEVERS: I feel like there are a lot of people out there listening who have spent exactly zero days being handy, like, their entire lives. Is there hope for people like this, and does your book provide it?
OFFERMAN: I think so. I mean, a lot of my own woodworking education comes from books and periodicals like Fine Woodworking and Popular Woodworking magazines. They’re great teachers, but they’re very somber. They’re very sober. So it was important to me for this book to be really friendly and gentle and fun to let you know that whether you’re getting into woodworking or making anything with your hands, it’s really important to know going in that you’re supposed to make mistakes. You’re supposed to screw it up.
And not only do I think this is a very friendly introduction to woodworking, but I really have become a little bit of an evangelist to encourage – find something to make. If you make stuff for your house or your loved ones, you’re curating your life in a way, saying, I don’t have to just limit my choices to what I can buy at Amazon. I can also choose to make a table myself. And even if it looks crappy, it’s still so much more charming because you’ve made that gesture.
You can listen to the 6 minute interview (it is funny) by clicking on the “PLAY” arrow in the upper left of this page:
http://www.npr.org/2016/11/17/502476216/nick-offerman-shares-his-love-of-woodworking-in-good-clean-fun
SolderSmoke Podcast #191 RIGS! REAL RIGS!, BITX40 Module, EMRFD, MAILBAG
SolderSmoke Podcast #191 is available:
http://soldersmoke.com/soldersmoke191.mp3
TRAVELOGUE AND FAMILY DOINGS: Pete son’s wedding, Billy’s Birthday, Gonzalo safely home in the Dominican Republic, MORE BEARS IN THE SHENANDOAH WOODS
Beautifully Ugly! A Homebrew Receiver from the Netherlands (video)
This one is similar to the receiver I’ve been working on: middle of the HF band, discrete components, all analog, 455 kc IF, wooden chassis, eclectic circuit boards. Very cool.
The builder is Ko Tilman. His YouTube channel is here:
https://www.youtube.com/channel/UCqe1Y4StR9cZ8BQDWuoMq9w
I came across Ko’s channel when I was looking for a circuit for an AM detector. I have been experimenting with the standard one diode and two diode (Germanium) circuits, but the receiver doesn’t sound very good when using these circuits. Any recommendations for something a bit better (without getting carried away with complexity)?
About Ko Tilman:
Occam’s Bench: M0XPD on the Minimalist Measurement Mindset
Our ace correspondent in Dayton, Bob Crane W8SX, caught up with Paul Darlington M0XPD (above, the guy with the rifle) and interviewed him about his presentation at Four Days in May 2016. You can listen to the interview here by clicking on the link below. I especially liked the comments on the joys of fixing things and the advantages of SIMPLE analog circuitry. Listen to the end and you will learn about Paul Darlington’s connection to the famous Darlington Pair.
http://soldersmoke.com/M0XPDFDIM.mp3
Paul provided more info (including his slide show and presentation notes) on his BRILLIANT Dayton talk here:
https://sites.google.com/site/shacknasties/presentations/fdim-2016
You can buy Paul’s book here:
https://www.amazon.com/getting-there-Paul-Darlington/dp/1523452196
Thanks Paul! Thanks Bob! And thanks to George Dobbs and William of Occam!
Great “QSO Today” Interview with H.P. Friedrichs AC7ZL — “My nature is to build.”

I sat in the shack this morning with a cup of coffee, mesmerized by the things Pete was saying. I actually took notes. Some highlights:
— In describing his zeal to avoid the use of store-bought components, Pete acknowledged that there are limits to this. But then he revealed that his limits are different than those of even the most fundamentalist of homebrew fundamentalists: “Well, I’m not going to mine my own copper.” Don’t worry Pete — no one will call you an appliance operator if you use store bought wire.
— On the same subject, when describing his homebrew diodes for crystal radios, Eric asked Pete why he didn’t just go out and buy a Germanium Diode. “That would be cheating,” replied Pete. Indeed.
— “Obsolete technology often gets short shrift.”
–“My nature is to build.”
http://www.qsotoday.com/podcasts/ac7zl
EMRFD Joy of Oscillation (Part 1)
Guys:
I have been catching up on the last few SolderSmoke podcasts after
that little QSO Today diversion. I wonder how many others did the
same thing? I have really enjoyed these recent ‘casts. Lots of
fantastic HB content. Funniest moment was when Bill described his
post-project workshop as looking like the aftermath from an electronic
barfight.
I took a new ham up on a SOTA activation last year. Then about a
month ago, he said that he wanted to do HF HB. He said he had been
googling and found so much that he didn’t know where to start. I told
him that I’d be interesting in doing a beginner HF HB project with
him.
I could have pointed him to LBS, et al. I could have pointed him to
the Michigan Mighty Mite. I did neither. I pointed him to:http://web.cecs.pdx.edu/~
the document. I pointed him also to:http://www.arrl.org/files/
(Did you guys know that chapter was online and free?) We scaled to 20m and
kitted parts for this. And parts for a 4th transistor PA for serious
QRO. 🙂
Two others joined us building for 40m. Check out the attached photos
of the first 3. The joy of oscillation was experienced by all.
After testing each oscillator, and borrowing from an article KK7B ran
in CQ VHF, I told each that he had to ID every 10 minutes. Even
though nobody was going to hear these signals a few hundred yards
away. (But it sounds loud on a shortwave portable a few inches away!)
I even wrote out the dots and dashes for a couple of them.
Next stop: to have everyone find a curbside TV discard, rip out some
parts, and get on 5 meters! Haven’t we gotten it back now, after the
transition to digital TV? 🙂
OK, maybe the next stop is to add some gain stages and experience the
joy of communication. The joy of QSO-ification? The joy of
EM-radiation? 🙂
Best regards,
Drew
kb9fko
From Paul Darlington M0XPD: A Book!
Hardware Hacking by Nicolas Collins
David Cowhig WA1LBP and I are the only two Foreign Service officers to have also been 73 Magazine “Hambassadors” (impressive, right?). David was covering Okinawa for 73 (and for Uncle Sam!) while I was doing the same in the Dominican Republic.
Today David sent me a link to the book “Hardware Hacking” by Nicolas Collins: http://www.nicolascollins.com/texts/originalhackingmanual.pdf
It is not exactly about ham radio, but there is a lot of electronic wisdom in Mr. Collins’ book. You folks will like it. I especially liked the hand-drawn schematics — this adds soul to the book.
Nicolas Collins is an interesting fellow. He is Profesor, Department of Sound, The School of the Art Institute of Chicago.
https://en.wikipedia.org/wiki/Nicolas_Collins
http://www.nicolascollins.com/read.htm
SolderSmoke Podcast #181 Of Dongles and DX-100s — SDR vs. HDR, Music & Art, 2B, HB2HB, Noise, The Martian, VK3YE’s New Book
SolderSmoke Podcast #181 is available:
17 October 2015
— Our audience IGNORES Pete’s guitar intro!
— Pete on QSO Today Podcast.
— Part 97, The Radio Art and International Goodwill.
BENCH REPORTS:
— Pete connects his new beam to the KX3.
— Pete puts the Bell-thorn on 20.
— Simple-ceiver update.
— Pete’s new drum machine: http://makezine.com/2015/10/15/learn-electronics-worlds-oldest-drum-machine/
— Bill fights noise in the DIGI-TIA.
— Bill fights power-line noise (and wins!).
— Drake 2B, skirts, reduction drives, and tuning rates.
— Warming up (with!) the DX-100.
— N2CQR — N6QW First Ever HB2HB QSO.
— On 40 AM with an HT-37
— Listening to Chinese CubeSats.
— SDR Dongle as a bandwidth checker.
— SDR and the Future of Homebrew Radio.
— Bryan’s LBS Receiver.
— Dean’s First Ever QSO with his HB rig.
— 32 Mighty Mites Completed
— The Martian — Did Mark Watney REALLY have the Knack?
— MAILBAG:
Peter Parker’s New Book
Sparks from Ron Sparks
Armand’s 1Watter
Rogier’s pyro machine
BIG boxes from Tim KI6BGE
Mikele’s ZIA and N6QW rig collection
SPRAT 141 and SPRAT 164











