Peter Parker's Video on SP5AHT's Phasing Receiver

There are so many very cool aspects of this project:  I love the phasing receiver arrangement -- it uses the same basic concept that allows my old HT-37 to generate SSB (I struggled to understand it as a kid, and finally succeeded!).   The use of the mobile phone as an audio spectrum analyzer is wonderful.  The N3ZI signal generator looks a lot like the DDS project I was working on (I should have bought N3ZI's! ).  I've been seeing these square pattern PC boards in many projects lately -- I may try this in my next project.  And of course, it is very cool to see a circuit designed in Poland being put to use by a fellow radio amateur in Australia -- a good example of the International Brotherhood of Electronic Wizards!

Here is the page for the SP5AHT rig that inspired Peter:

http://www.sp-qrp.pl/modules.php?name=Content&pa=showpage&pid=54

It is in Polish, but Google should translate it, and, in any case, we all speak Schematic!

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"Chart of Electromagnetic Radiations"

Wow, all you need to know, right here on one poster!  They even cover particle/wave duality.  I tried printing it up in hi-res but the uncertainty principle seems to be interfering! Get yours here:  http://www.flickr.com/photos/llnl/9403051123/sizes/l/ 


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Oscillo-porn! A $500,000 Oscilloscope! (video)

I don't know,  I think I like my Tek 465 better!  But if any of you guys are thinking of buying one of these, PLEASE do so via the Amazon link on my web page!

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Dipoles in Space! Millions of them!

http://www.wired.com/wiredscience/2013/08/project-west-ford/

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SolderSmoke Podcast #154

SolderSmoke Podcast 154 is available for download!

http://soldersmoke.com/soldersmoke154.mp3

August 11, 2013

-- Alligators!  Real Alligators! (see picture below -- look closely)

-- Ten meter beacon project (with Arduino and Reverse Beacon Network)

-- Telescope repair:  Chap Stick as lubricant, and the perils of macular pucker!
 
-- HW-101 saved from cannibalism!
 
-- The Wonders of WSPR and our need for instant feedback and gratification.

-- QST Review of SolderSmoke, The Book.
 
-- MAILBAG

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Kishan Has the Knack! (video)

Many of us were staring out similar windows, also dreaming of model airplanes, and of transmitter circuits, and telescopes, and rockets... This video runs only 12 minutes.  Don't be deterred if you don't speak Hindi -- the story is easy to follow.

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

Who Invented the Transistor?

http://www.beatriceco.com/bti/porticus/bell/belllabs_transistor1.html

I dunno.... Roswell?  Really?  But I find myself attracted to anything that involves the use of iron pyrite and cats' whiskers in radio.  Mike, KL7R, sent me a bunch of fools gold from Alaska and it turned out to be better than galena as a detector. 

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

Homebrew Transistors (video)

So you are using store-bought transistors eh?  APPLIANCE OPERATOR!

Check out Jeri Ellsworth's very impressive production of NMOS transistors.

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

Solar Field Flip! (video)

Too bad we are not in late March.  This event has such great April Fool's potential:
Some ideas:
-- You'll have to rewind all your toroids!
-- You should switch the braid and the center conductor on all your coax!

I like the "cup half full" sentiments in this video:  The second half of Solar Max is about to begin!

Thanks to Kim VK5FJ for sending me this.






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SALE: SolderSmoke book for about $16 (save 20%)

This coupon will get you the SolderSmoke book for around $16. Valid through August 9.

http://www.lulu.com/spotlight/soldersmoke


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

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

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

Soul in an Old Telescope

I like this telescope.  The owner built it in 7th grade and is still using it at age 70.  I'm still using the Drake 2-B that I bought with newspaper route money, so understand the sentiments.  

http://makezine.com/2013/07/29/through-a-diy-telescope-brightly/ 

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

Soul in the Old Machine: HW-101 Saved From Workshop Cannabilism

Most of our correspondents did not like the idea of me trying to convert my Heath HW-101 into a BITX-101.  But, thinking that I still might to this,  I decided to take the old rig off the shelf and see what it looked like.  I liked the looks of it -- lots of space, simple circuitry,  nice belts and gears for turning the many variable capacitors, no black box ICs.  I could see traces of my earlier repair adventures -- electrolytic caps that had been replaced, the plastic dial clutch that I'd "fabricated" myself.  Then I decided to try to fire it up. Hey, the receiver sounded very good.  Next thing you know, I was getting the transmitter going.  Then I was working DX on 20.  By the end of the afternoon, I knew there was no way I would be tearing this old rig apart.  There is simply too much soul in this old machine. 

More on this in SolderSmoke 154....

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The Viganella Heliostat -- A Village Brings in the Sun (Video)

http://www.odditycentral.com/pics/viganella-the-italian-village-that-built-its-own-sun.html

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EXCELSIOR! Happy Birthday Jean Shepherd

 

 

NPR's "Writer's Almanac" alerted us to this:    Shep was born on this day in 1925.  I realize now that that made him just a week or so older than my dad (who was a big fan).

Here is a really nice site with info about Shep, ham radio, and his call sign: 

http://www.flicklives.com/index.php?pg=318

EXCELSIOR !!!!!!!!!!!

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HB-101 ? BITX-101?

 

 

OK, so I've been wanting to build a BITX-20 for a long time.  Then Steve "Snort Rosin" Smith sent me a nice 9 MHz filter, and I started to think about using it to build a BITX 75/20.   But I don't really like 75 meters too much...  And I have this Heathkit HW-101.  I like it very much, but these rigs do not age well:  Too much heat, too many cheap components, tubes on PC boards... yuck.  I got tired of fixing it.  I've occasionally fantasized about scrapping most of the HW-101 circuitry and turning this rig into a 100 watt linear amplifier. But I didn't have the heart to do this.  Then, on the way to work yesterday it hit me:  Why not take the beautiful bi-directional circuitry of Farhan's BITX design and use that to solid state most of the HW-101?    Obviously I'd retain the finals and maybe the driver, and the CW and SSB filters.   The VFO could be transistorized.  Maybe I'd retain the tube AF amp.  I'd like to add 17 meter capability.  Pete Juliano took an HW-101 and added a digital dial (that's his rig in the picture).

 

What do you guys think?  Am I nuts?  Or would this be a worthwhile project? 

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The Nanomembrane Laser Detector Receiver

 



I like it!  Here we find some cutting edge radio technology that does not involve millions of microscopic transistors and thousands of lines of code. And it can be explained in a few paragraphs without resort to exotic math.  It even makes use of our beloved LC resonant circuit.  Quick, where did I put Billy's green laser?  And where can I get some silicon nitride? 
  
http://m.technologyreview.com/view/517336/physicists-detect-radio-waves-with-light/

Thanks to Jim, AB3CV, for sending us this.

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

Earth as seen from Saturn

Look closely.  We're the little dot.  Photo taken July 19 2013 by the Cassini probe.   People were waving!  Really:  http://www.newscientist.com/article/dn23914-shiny-happy-earth-photobombs-saturn-snapshot.html?cmpid=RSS|NSNS|2012-GLOBAL|online-news#.Ue2_i2DD-ic


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Tour of WLW 500,000 Watt Transmitter (video)

Well, you know that you are really in the high power big leagues when your transmitter requires a cooling pond, and you have to put on welding goggles before you examine your tubes!  I especially liked the bit about how they built the transmitter BUILDING from the packing materials used to ship the transmitter (my operating desk is made from a box used to ship my HT-37!). 

This is all really amazing.  They built this thing less than ten years after the initial launch of commercial broadcast radio in the U.S. 

Thanks a lot to Randy for doing this video and to the guys who gave the really excellent tour.

My apologies to the QRP purists who I know will have been deeply disturbed by this presentation.

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Oldest Drake 2B? (now with pictures)

Bill and Soldersmoke readers,

One of the earliest and still surviving Drake 2Bs is owned by Paul Brock (K4MSG) of Hamilton, Virginia.

Paul is very much into Boat Anchor Ownership and Restoration.  

 

If you are interested, look at his write-up titled “The Magic of Boatanchors” http://www.k4lrg.org/Projects/Magic_of_Boatanchors/index.html

 

 

K4MSG’s Drake 2B Receiver s/n 2052

 

In my perspective, this receiver is still an absolute “Keeper.”  

If anyone has a Drake 2B older than Paul’s,  we’d love to see it.

We have all surmised that the first 2B was serial number 2000, from the first production run back in April 1961.

Paul’s radio could have easily been one of the first receivers to hit the market.

 

Interesting sidebar; The early 2B and 2As do not have the red scale log scale adjustor button.  

 

I remember these when they first hit the market. They seemed so small compared to the Hammarlund, Hallicrafters and National triple conversion receivers from the same era.

Most Old Timers felt they were not going to get their monies worth with a tiny receiver sitting next to their big 60 to 100 Lb. transmitter.

In 1962, this was a very modern radio both in style and performance. Coupled with the Q-Multiplier/Speaker you had a superb receiver which worked extremely well on C.W., A.M. and S.S.B.

 

My first experience with the Drake 2 B came at Skyview Radio Club near the Pittsburgh, Pa area back in 1965.

 

 

 

Here is one of those early ads that show the Drake 2B without the Red Scale Slider Button.

 

 

 

 

Happy building and melting solder everyone.

 

73’s De -=WA3EIB=- Harv. Albq., NM

 

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