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Monday, September 27, 2010

SolderSmokeStatus

I've been getting some increasingly desperate messages about SolderSmoke withdrawal symptoms so I thought I'd better send out a status report. Also, one listener wrote in addressing me as "The Grand Poobah of the SolderSmoke Brotherhood." Wow, with a title like that, I better get going with the podcasts!

Most of the stuff is in the shack. The workbench is assembled. I'm trying to set up for both 220 and 110 (lots of Euro gear accumulated over the last ten years!) Surprisingly, Home Depot doesn't sell 110 to 220 transformers. And I live in an area where LOTS of people move back and forth across the pond. I may have to press my old autotransformer into service.

Most of my really old gear -- the stuff that went into storage over the last decade -- should show up in a week or so. This means my HT-37, DX-40, DX-60, Lafayette HA-600 etc. will be reappearing on the scene.

I hope to get some beacons (uh, I mean MEPTs!) on the air soon.

Unfortunately my ancient computer gave up the ghost during the trip. Hard drive is making scary noises. This will slow down the podcast as I have trouble putting it together with Linux only (which is what I'm operating with now -- thanks Jorge! Without your help I'd be completely off the net) Anyone have any version of Windows I could legally use?

But the Drake 2-B is doing fine. I'm listening to 75 SSB as I type.

Hang in there loyal listeners. Perhaps some of that nicotine gum would help. Or, better, some REAL solder smoke.

73 from the GP

Bill

Sunday, September 19, 2010

Climbing a REALLY tall tower

No thanks, I think I'll stick to tree-supported dipoles.

http://www.ebaumsworld.com/video/watch/81100181/

Thanks to Brent, KD0GLS for sending along this really scary video.

Saturday, September 18, 2010

Getting Settled -- Slowly. Yogi Berra on Theory and Practice

I've been getting some "Are you alive?" inquiries from SolderSmoke fans. I'm happy to report that, yes, I am still around, and doing fairly well. This move back to the states has been a bit more difficult and complicated than previous transfers, but slowly the shack is starting to come
together. Moat important: The Drake 2-B survived the journey!

It may take me a few weeks to start emitting whistling S sounds and Gong noises ("Wow, that's awesome!') but hang in there, new SolderSmoke episodes are on the way.

Meanwhile, I wanted to share with you a Yogi Berra quote sent to me by Brent, KD0GLS. I think this is especially appropriate because my grandfather actually played for the New York Yankees:

"As I make my way through the back episodes of SolderSmoke at a stately pace and hear you speak of Bletchley Park, I'm also reading "Secrets & Lies" by Bruce Schneier, renowned cryptographer and internet security expert. In his book, I read this timeless quote that immediately made me think of our hobby:

"In theory there is no difference between theory and practice. In practice there is."
Yogi Berra"

Thanks Brent! Thanks Yogi!

Sunday, August 8, 2010

A confession

Well, I didn't actually do it, but I thought about it. As the date of our departure from Italy approached, I was -- as readers and listeners will remember -- getting deeper and deeper into minimalist QRSS beacons. During the final weeks I was running my 15 mW Hans Summers-inspired varactor-modulated FSK transmitter from our country location up in the Sabine Hills. I had it running off one of my Volkswagen solar panels. I knew that the owner of the olive grove wouldn't mind if I left my nearly-invisible doublet antenna in the trees... You guys see where I was going with this. I came close to leaving that thing on the air. Sometimes I kind of wish I had. It would have been fun. But the QRSS beacons already seemed to be pushing the regulatory envelope a bit, so the solar panel and the beacon board went into the shipping container. I hope they will soon be radiating from Northern Virginia...

All OK here. We are getting settled. Our stuff should be arriving in the USA next week. We may have a new podcast out by early September.

We are still in a temporary apartment. This week Billy and I visited the local hardware store and got some very thin magnet wire. I have about 50 feet of it going from the balcony to a tree. As I type I'm listening to SSB net activity on 40 meters with my little Sony portable receiver. Man, that recent Coronal Mass Ejection really seems to have messed up propagation. But hopefully it is an indication that Ole' Sol is coming back to life.

Saturday, July 31, 2010

From Italy to Virginia: Move update

We're still in a temporary apartment, waiting to move into our new place. The new QTH has some good tall trees suitable for wire antenna support. I have my eye on a room for the shack.

Not much radio activity this summer. I do have my Sony shortwave receiver with me -- I've been listening to 75 meter AM. My Heathkit VF-1/DX60 combo will be coming out of storage, so I may soon be joining in.

My kids got I-phones and are having a lot of fun with them. As we drive along they are in multimedia contact with friends back in Italy (and elsewhere), texting, e-mailing, Facebooking, video-texting, etc. The I-phone 4 is an amazing piece of gear.

Summer reading: I kind of got bogged down in "Is God a Mathematician?" by Mario Livio. Good book, but as he gets deeper into it you really need to focus -- I'll get back to that when things settle down. I'm currently reading "Why does E=MC^2"by Brian Cox and Jeff Forshaw. I was attracted to the book because it promises to discuss the role of special relativity in things like toroidal tranformers. (There is a section called "Einstein in the Transformer in SolderSmoke -- The Book.") I like the authors' approach to math: they actually explain where the formula for gamma in special relativity comes from.

"Wired" looks at Radio Shack

Art, KG6ZWD, sent this link to me. Looks like Wired magazine has an interesting article about Radio Shack.

http://blakegonzales.com/2010/06/30/growing-up-with-radioshack/

I always liked these stores. They were never perfectly aligned with our needs, and they seem to be drifting even further away, but over the years I picked up lots of good gear and needed parts at these stores. Ideas too! I have those "Mini Notebooks" by Forrest Mims. Great stuff!

Wednesday, July 28, 2010

Modular Magic from AK2B

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

This video really made me yearn for my shack and soldering iron (all my gear is still on the high seas). OM AK2B is doing amazing modular things in an apartment in NYC. Richard Fenynman would be proud! I was pleased to see the circuits and kits of so many FB radio amateurs (including KD1JV, W7ZOI, and KA7EXM) in this rig. Thanks to Jonathan-san, KC7FYS, for sending this video to me.

Save 20% on SolderSmoke -- The Book

Lulu just announced a big summer sale, good through August 1. This is a good chance to get "SolderSmoke -- The Book" in time for that late-summer beach trip. Just use the coupon code SANTA when checking out. (U.S. buyers may find it more advantageous to use the summer-long free shipping offer.)

Find the book here:

http://soldersmoke.com/book.htm

Thursday, July 22, 2010

Back in Northern Virginia, SUMMER SALES

It seems like I have personally moved back several chapters in "SolderSmoke -- The Book." After being away for 10 years, we are back in the same part of Northern Virginia that we lived in before. The SS Shack is still out at sea -- it is due in sometime next month. We should be settled by early September.

The "free shipping"offer for the SolderSmoke book is still in effect. That is for shipment in the U.S. only, but buyers elsewhere can take advantage of a special 15% off option by using coupon code BEACHREAD305 on the U.S. version of the book.

I hope everyone in the Northern Hemisphere is having a good summer, and that our "down under" listeners are having an easy winter.

73 Bill

Wednesday, July 7, 2010

The Future of SolderSmoke

We're now in Santo Domingo, Dominican Republic, visiting my wife's family.

I've had some time to think about the future of the podcast. There will have to be a summer pause -- my shack is now in a bunch of boxes, out in the Atlantic ocean somewhere (hopefully above the surface!).

I want to use the move to improve the podcast and the associated blog and websites. Here are some initial ideas:

-- Reaching out to a broader community of Knack victims. It would be good thing could use the podcast to pull in guys who are solder melters, but who are not (yet) hardcore QRP homebrewers.

-- Better audio. I need a real microphone. Maybe a simple equalizer. I need to REALLY get rid of the SSSSSS problem.

-- Easier-to-use software. I'm still using the collection of software that Mike, KL7R, and I threw together five years ago. It all starts with Audacity (which works very well). But then for updating the website I'm using an OLD version of Mozilla composer. Updating the .rss feed is even more rickety -- I manually go in and change the text using Microsoft's notepad. There has to be an easier way of doing all this.

-- Self-hosted blog. I'm currently using Google's Blogspot to host the blog. But I see some advantages in moving to a self-hosted blog. I'd like to have a better comment/dialog feature, something more like the discussion board on the "AM Window" and other similar blogs.

-- More video. Don't worry. I'll stick with the audio podcast. But video is fun and useful, so I want to try to do more videos.

-- More guests on the show. I often say this, but in practice doing this makes it a lot harder to do a podcast. But maybe this will get easier now that I'm in the East Coast time zone.

Let me know what you think. 73 from Santo Domingo

Sunday, July 4, 2010

Miami SolderSmoke

The family and I are now in Miami. We departed Rome on Thursday, made a quick visit to San Diego (to see my brother and his family) and are now in beautiful Miami, right on Biscayne Bay. We'll be here for a few days. No radio activity to speak of -- the move kept me quite busy. But I picked up a good book at the airport -- "Is God A Mathematician?" by Mario Livio. It provides a lot of useful info on some of the math-in-electronics issues that we talk about on the podcast and in SolderSmoke -- The Book.

It was hard to leave Rome, but we are happy to be back in the USA on the the 4th of July. We'll watch the fireworks tonight.

Friday, June 25, 2010

Homebrew Fusion Reactor in New York City

Not really a QRP project (the goal of course is definitely QRO) but Knack victims will find this article and the associated video interesting. We've covered homebrew fusion before. This fellow is the 38th successful "amateur fusor" in the world. Go Brooklyn!

http://news.bbc.co.uk/2/hi/world/us_and_canada/10385853.stm

Monday, June 21, 2010

New Sci-Fi Show: Pioneer One



Not bad, especially for a $6000 budget! You can watch it free on You Tube. Here is part one.

Sunday, June 20, 2010

SolderSmoke is Moving the Markets!

Hi Bill,

I was at the East Suffolk Wireless Revival yesterday (Sunday) morning – hardly FDIM, but still a nice little flea market / boot sale, maybe 20 / 25 people selling odds and ends from SMD components to rigs and other bits of kit. Finished up in a bit of a good natured scrum fighting over variable capacitors made all the more desirable for having proper shafts and being made of something other than plastic.

Your name came up as being the inspiration for a resurgence in home building and the subsequent rise in prices of desirable bits as they became scarce as more people wised up to the fun of building and the ease of just melting solder straight on to the PCB rather than trying to etch something. Rather suspect that your podcasts and that book are actually being more influential than you realise. Read my copy lying on the beach in Antigua, but still keep going back to it, and as you have said in the past, the rest of the library – it’s making a very pleasant change from the Masters that I’m buried in at the moment.

Bought the UK equivalent of a Harbor Freight punch over a few days back, so can now make my own little round pads out of old PCB – magical !!

Good luck with the move – I was brought up on a prison farm in Tanzania amongst other places, so recall all too well that strange sense of loss when you leave a country for pastures anew. Lovely to hear Maria sounding so Italian – picking up another language at that age is a wonderful thing to have done and will no doubt stand both her and Billy in good stead over the years. I still manage a little Swahili after 50 years, including teaching my last 2 dogs a few commands which is always funny.

Looking forward to the next podcast – they have become an important little interlude in my life and keep my interest in amateur radio invigorated

All the best

Nick

Saturday, June 19, 2010

Thomas Edison, On the Air



There is an interesting technical story about how this was recorded, and how the recording was recently recovered:

http://www.timesunion.com/AspStories/story.asp?storyID=942480

Friday, June 18, 2010

"100 Feet Up In A Pine Tree, Soldering Iron Clinched In His Teeth"

Radio Guys at University of Virginia, 1966

Hi Bill.

I emailed you once to the Yahoo! address, but thought I'd send an updated email to your soldersmoke address, in a desperate attempt to be mentioned in the gonging "SolderSmoke Mailbag"!

I learned of the podcast at May's Hamvention. I wish I had known of the Four Days in May event, but this was the first Dayton I've ever been to.

I thought I'd mention that the ham club I'm involved with here in central Virginia, the University of Virginia club, is putting together a rhombic antenna out in the woods. Although more sweat (and hornet stings) than solder smoke is expected to come from this effort, I still thought it would be worthy of note within the realm of homebrew activity. I hope to have some photographs from our slingshot-and-fishing-line event. With a large crop of able-bodied 20-somethings at our disposal, we should be able to get this thing put together in short order (one of our new members even has extensive tree-climbing skills and a battery-powered soldering iron! If I can get a shot of him 100ft up a pine with the iron in his teeth, I will be sure to pass along). It is hoped that our new monster antenna will help us compete with our cross-state rivals, the Hokies of Virginia Tech. I will be sure to sacrifice a few chickens to Papa Legba prior to our outing.

There are definitely still young people interested in homebrew radio and I work everyday alongside many victims of "The Knack". I'm working on spreading the SolderSmoke gospel to as many of them as possible, and letting them know of our library of "Sacred Texts": EMRFD, Solid State Design, and Electronics of Radio, among others. And of course, some of our "Prophets" of the faith: Ashhar Farhan, the Haywards, and the late Doug DeMaw.

I also wanted to say that since I have a lengthy commute to and from the university, I've been listening to ALL of the soldersmoke podcasts, starting from the first one. I'm up to the summer of 2007 now. I found it very sad to hear of Mike KL7R's death in Jan 2007 and I find that I do miss the back and forth banter the two of your shared on the podcasts. However, it is still a lot of fun to listen to and I've kept a small logbook of ideas from the episodes, building up a list of projects I hope to soon embark upon.

Best 73 and thank you for your podcasts.

Bert WF7I

Wednesday, June 16, 2010

The Last Roman Rig: New WSPR DSB Transceiver

They are coming to pack up my soldering iron next week, so I'm afraid this will be my last Roman creation. You can see the W3PM Colpitts oscillator in the center. The KA7EXM AF amp is in the lower left. The Softrock-based Manhattanized PA is in the upper right. To the right of the oscillator is a classic W1FB two diode balanced modulator. You see three big green relays. The top one switches the antenna and 12 volts during T/R switching. The middle one switches the audio amp input, the bottom one switches the audio amp output. (I use the same AF amp for receive and transmit, just switching around the input and output.)

It works fine and has sent and received WSPR sigs. I think it will also do PSK-31 with the FLDIGI program. I could use a one more stage of RF amplification between the balanced modulator and the PA driver amp. Also, the AF impedance match between the KA7EXM amp and the balanced modulator nees work: Roger's circuit was deisgned to drive high impedance phones. That balanced modulator circuit has about 50 ohms at each port. Ideas?

I was thinking of calling it the Achilles. But I think I will go with "L'Aquilone" (The Kite").

Monday, June 14, 2010

Above Board: Manhattan-izing an SMT kit

A while back, Tony Parks very kindly sent me one of his wonderful Softrock RXTX V6.3 Software Defined Radio kits. I took a shot at it, but it turns out that I'm not very good with surface mount construction using small parts. I've gotten very used to the Manhattan style. Still, I did manage to build one of the Power Amplifier modules, and I put it to good use in a DSB WSPR transceiver I've been building (see above) . It worked great. For a while... Then it released some smoke.

I started trouble shooting and it was at this point that I REALLY began to miss good ole' Manhattan (you see, I was born there, and I went to Manhattan College, so I guess this helps explain the affinity). It was difficult to get to components mounted under the board. The whole thing was the size of my thumb... I know, whine, whine, whine... Luddite Geezer-ism strikes again. SPARK FOREVER!

It turns out that the problem was caused by the fact that my shack is just not well suited for this kind of construction. There is a lot of stuff floating around. Conductive stuff. Look closely at the picture below and you will see what I mean. You will see what caused the release of the smoke. Look at the leads on the PA transistor on the left. That's a little bit of stray wire that found its way to the WRONG place. Note the toasted source resistor just below!

Anyway, after a trying to fix this thing, I finally gave up and decided to use the circuit, but in Manhattan form. Everything up top. No SMT. Bigger coil cores. The temperature sensing circuitry went off to the right. The output transformer went off to the left, and the driver stage went down below the kit's board. Here is what it looks like now. Again, it works great.

I want to thank Tony and the Softrock guys for giving me this experience. Their kits are wonderful and are really making a tremendous contribution to the hobby. I strongly recommend them. The instructions are great, much like those of the old Heathkits. But for me, I'll take Manhattan.

Saturday, June 12, 2010

SolderSmoke Podcast #125 -- SPECIAL FDIM EDITION


http://soldersmoke.com

Special Four Days In May Edition!
Opening music: FDIM Bluegrass
Our last (sniff) Italy Travel Report
Snakes and Fireflies in Lazio
G3ROO's Antenna Book
Davinci beacon crosses the pond
WSPR rig repaired
New transceiver built for 30 meter digi
Manhattan-izing an SMT board
Paul Harden's wonderful book
BOB CRANE'S FDIM INTERVIEWS!
"Muntzing" with Michael, G3RJV's "Socketry"
Meeting Andrea IW0HK in Piazza San Cosimato!
MAILBAG: Including mail from Farhan, Roger Hayward and Ade Weiss

Monday, June 7, 2010

OH NO! UVB-76 Goes Off the Air! Duck and Cover!

From Wikipedia:

UVB-76 is the callsign of a shortwave radio station that usually broadcasts on the frequency 4625 kHz (AM full carrier). It's known among radio listeners by the nickname The Buzzer. It features a short, monotonous About this sound buzz tone , repeating at a rate of approximately 25 tones per minute, for 24 hours per day. The station has been observed since around 1982.[1] On rare occasions, the buzzer signal is interrupted and a voice transmission in Russian takes place. Only three to four such events have been noted. Despite much speculation, the actual purpose of this station remains unknown. On June 5, 2010, UVB-76 stopped transmission suddenly, the first time there is no signal received from UVB-76 since 1982. [2]

http://en.wikipedia.org/wiki/UVB-76
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