Fernando's Rigs -- Vintage Ham Radio Receivers

Thanks to Rogier PA1ZZ for sending me this YouTube link.  It is a truly wonderful channel from Spain. Not only the Collins Gold Dust Twins, but also lots of great (and not-so-great!) older receivers.  SP-600s, S-38s,  Rhode and Schwartz rigs, lots of great stuff.  Go to the "Videos" link and enjoy the Thermatron goodness.   Thanks Rogier!  And thanks Fernando! 

 https://www.youtube.com/@jonglei

Around the World Twice (and maybe more) on 15 meters

 

John EI7GL has a great blog post about some experiments recently done by Salvador EA5Y.  Salvador was aiming his 4 element yagi in one direction, sending dits, and watching for the signal to come around the other side.  You can see the results in the display above.  I commented that this might be the time for one of those antennas with which you can instantly reverse the pattern. Or, probably better, have some other hams aim their antennas in the opposite direction so that they can catch the circumnavigating signals. 

Check it out: 

https://ei7gl.blogspot.com/2023/12/twice-around-globe-on-21-mhz-and.html

Two trips around is 80,000 km or about 50,000 miles!  That's quite a trip.  But how about 3 times around?  Or more? 

Thanks to John EI7GL and to Salvador EA5Y.  

Building a Crystal Set (Videos)

Andreas DL1AJG in Germany sent the above video to me.  Andreas is the fellow who ran the course in which his university-level students built direct conversion receivers.  

I like the presenter's technique.  But it would have been cooler if he actually used a chunk of Galena or Iron Pyrite, with a cats whisker.  (I still have some of the Iron Pyrite that Mike KL7R gave me many years ago.)  I think that all radio amateurs should (as a rite of passage) actually poke a crystal with a cats whisker in search of a signal. Like here: 

 Thanks Andreas!

A Low-Power (QRP) Contact from Australia to Spain (with video from both sides!)

A recent comment on the blog put me back in contact with an old friend of SolderSmoke:  Paul VK3HN.  Paul is an amazing homebrewer -- it was great to hear from him.   He sent along this video of a portable Summit on the Air activation from the Melbourne Australia area.   Paul managed to contact Ignacio EA2BD in Spain.  Ignacio was also running low power with a portable set up.  The remarkable thing is that we have video from both sides of the contact.  FB!  Thanks to Paul and Ignacio. 

"Onda Corta" ("Shortwave") -- A Short Film about Ham Radio in Venezuela (Please ID the Boatanchors!)

https://youtu.be/J1QlKykhR2M?t=583

I have it cued up to 9:43 -- at that point Ramon is in his ham shack.  

Lots of good stuff in there! 

Please ID the rigs/parts you see and list them in the comments below. 

This version has subtitles in English.  I like it -- a nice story.  And the whole film is only about 15 minutes. 

A Very Early Radio-Controlled Device -- Using Spark and a Coherer, in Spain

Click on the picture for a better view -- check out the coherer and the tapper 

Hack-A-Day has an interesting story about Leonardo Torres Quevedo and his very early automated chess machine.  Torres Quevedo was a Spanish inventor active in the early years of the 20th century. 

The chess device was really interesting, but two things caught my eye about this fellow: 1) he lived and conducted some of his experiments in my old home of Bilbao, Spain and 2) he built a very early radio-control system that used -- in the receiver -- a coherer as the detector.  

There is a lot material on Torres Quevedo.  Here is just a sample of what is out there  

His book:  https://www.torresquevedo.org/revistas/index.php/BIB/issue/view/12/1.  Discussion of the Telekino device is on pages 109-127. 

The Branly Tube or Coherer: https://en.wikipedia.org/wiki/Coherer

https://en.wikipedia.org/wiki/Leonardo_Torres_Quevedo

https://www.researchgate.net/publication/2998424_Early_Developments_of_Wireless_Remote_Control_The_Telekino_of_Torres-Quevedo

https://cyberneticzoo.com/wp-content/uploads/2010/12/Telekine-Yuste.pdf

1903 article in Electron (Spain) about the Telekino and Coherers. https://hemerotecadigital.bne.es/hd/viewer?oid=0028654330&page=6

https://alpoma.net/tecob/?p=13766   This article contains the diagram of the device (see above).  You can see the coherer with its tapper.  

Here we see the Telekino installed in a boat in Bilbao harbor.

First Ever Contact on 12 Meters: Homebrew, QRP, SSB, DX (Video)

I've recently finished most of the circuitry on the 17-12 meter dual band SSB transceiver. I have had contacts with it on 17 meters, but until yesterday morning (March 22, 2022) I had not had any contacts on 12 meters. This morning I talked to Paul EA5JZ in Valencia, Spain. I was running the 17-12 rig barefoot at about 5 watts with the final being one RD06HHT FET. The antenna was my 75 meter doublet fed with window line -- I had to modify the tuner to get it to work on 24.9 MHz. It was very cool to have my first 12 meter contact be QRP, HB and with Spain.

There is a LOT of soul in this new rig.  Here is a partial list of contributors: 

-- Overall BITX design:   Farhan VU2ESE

-- Termination Insensitive Amplifiers (TIA):  Wes Hayward W7ZOI and Bob Kopski K3NHI.  

-- TIA boards from Todd K7TFC

-- ASK-1 Mixer from Armand WA1UQO

-- VFO design parameters from Joe Carr K4IPV (SK) 

-- VFO stability ideas from Frank Harris K0IYE and Mike Murphy WU2D. 

-- HT-37 Tuning Capacitor bought from e-bay at suggestion of Pete Juliano N6QW. 

-- Pine board base of the rig:  Frank Jones (SK) W6AJF's preferred building technique. 

-- DTC Band-Pass filter circuits from Han Summers G0UPL. 

-- Low pass filter values from G-QRP web site. 

-- Idea of using RD06HHT instead of IRF-510 in the final:  Pete Juliano

-- Heat sink from Chris KD4PBJ

-- Trifilar Toroids used in many places from Farhan VU2ESE.

Thanks to all.  73  Bill  

Receiving Signals from China's Chang'e-5 Lunar Sample-Return Mission

Background info: 

https://www.scientificamerican.com/article/chinas-change-5-mission-launches-to-collect-lunar-samples/

 A great report from Daniel Estevez EA4GPZ on radio amateurs receiving telemetry from Chang'e-5: 

https://destevez.net/2020/11/a-look-at-change-5-telemetry/

SolderSmoke Podcast #224: Mars. Spurs. Bikes. SDR. NanoVNA. Antuino. MAILBAG

SolderSmoke Podcast #224 is available:

http://soldersmoke.com/soldersmoke224.mp3

1 August 2020

--The launch of Perseverance Mars probe with Ingenuity helicopter.

--China’s Tian Wen 1 on its way – radio amateur Daniel Estevez EA4GPZ is listening to it! 

--Sci Fi Books:  Mars Trilogy by Kim Stanley Robinson.  No skip on Mars :-(

--We have some sunspots!  SFI now 72 and the Sunspot number is 23. 

Bill's bench: 

--Conquering Ceramic Spurs in Q-31   Roofing filter -- sort of 

--NE602 for a Q-75 converter – Gilbert Cell. 

--Measuring low power levels out of NE602.  Antuino better than 'scope . 

--NanoVNA   Really cool stuff.  SDR in there. 

--Building a 455 kc LC filter from QF-1 rubble. Using LTSPICE, Elsie... 

--Reviving my bicycle AM radio – The “All Japanese 6”

--Understanding L Network impedance matching. 

--Bill’s new resistor kit from Mouser. Thanks to Drew N7DA. 

SHAMELESS COMMERCE:  PATREON, AMAZON SEARCH.  THANKS

Pete's Bench: 

--Lockdown Special 

--BPF work on SDR Rig

--I U W I H 

Mailbag:

VK3HN Summit Prowler 7

VK2EMU “The Stranger”

SM0P  HB uBITX in Dubai

AE7KI  Worked him in VK from London

ON6UU  EA3GCY’s 4020 rig

KA4KXX A Simpler Mighty Mite

W9KKQ M19 DMR

KD4PBJ Radio Schenectady

W3BBO 12AU7 Regen

KE5HPY Another 12AU7 regen

N5VZH Ne602 Converter

KY3R Wall Art

G4WIF  Spectrum Analyzer in your pocket

W2AEW  Talks to UK Club

KK0S Sent 455 Kc IF cans

KL0S Making 9Mhz filters

VU2ESE  Diving into simple SDR schemes

Dean KK4DAS  Amateur Radio Astronomy

ON6UU's DB4020 EA3GCY Rig

Hi,

Recently I got the EA3GCY newsletter,  it announced a new kit DB4020,  a 2 band transceiver kit covering 40 and 20 mtrs.  I know Javier EA3GCY’s kit are good so I ordered one.  A week later it arrived in a brown enveloppe in which I found all components and printboard wrapped in bubblewrap,  it was all well packed and after checking all components all was accounted for,  all components were indeed there.

8 toroids have to be wound,  following the instructions it was piece of cake,  no problem,  

After several hours of work - relax max style - I got everything in place to test,  hurray,  no smoke !!!!  So now the SSB part was ready,  I have 7W on 40 and 3.5W on 20mtr.  Good power for qrp sota,  wff or just garden activity.  A fortnight later I got notice that the CW part of the kit was ready and another week later it arrived here,  I soldered the 2 boards as soon as possible to get a multimode 2 band transceiver.   The 2 boards are the CW interface which also holds the KB-2 keyer,  the second board is the 500-600HZ CW filter.   The KB-2 give the user 4 memories,  beacon function and some more functions.  Good thinking to include the keyer,  it makes life easy when you’re on an activation. 😊   I opted to make the filter switchable,  I like to be able to listen broadband too,  very simple,  cut one leg of the 13 pin connector on the bottom of the CW interface and put a switch on both ends.

After some figgling around I also got the box ready,  a military grade plastic box with wall thickness of 5 mm,  this box should be able to withstand a lot of shocks and a drop to the ground.  I also made a docking station for a laptop battery which holds some 5Ah and which should be able to give me a lot of hours of listening and some 2 to 3 hours of operation.  I had an old laptop which the screen was broken and had some other malfunctions,  I have taken the battery connector out of it,  luckily I still have another laptop which still works and this is the charging station for the batteries …. ..  😊   The docking is only to test,  I will box it up in maybe a some box where I can then maybe also fit a end fed solution or tuner for coax fed antennas.

A new radio also needs a new CW key so I made one out of an old relay,  painted the base green to fit somewhat the box et voila,  here is the result of the complete portable station.

The key can be fitted to the box by means of a bolt and a wingnut.  A short cable goes to the CW connector of the transceiver.

I had a lot of fun constructing this kit,  the box,  the docking and the key.   For 180€ you get a arduino nano controlled CW/SSB transceiver with 2 bands on which most of the activity is and you also get a keyer with memories.   Good deal I think.   More info is available on EA3GCY’s website.  Javier is also very quick in responding to questions,  he ask for opinions and offers almost an Elecraft style of service.

I made some video’s which are on youtube :

https://www.youtube.com/watch?v=Y9sUbyAlF00&t=12s

https://www.youtube.com/watch?v=hGDwLdkr3HU

https://www.youtube.com/watch?v=ZiMnpfte4cI&t=35s

https://www.youtube.com/watch?v=oLYIgVv7So8&t=130s

The kitters website :

https://www.qrphamradiokits.com/

https://www.qrphamradiokits.com/transceivers/db4020-dual-band/#cc-m-product-12710260049

Best 73

Frank

ON6UU

Please Listen: Something Wrong with Spanish National Radio Signal?

I've been getting back into shortwave listening. One of my favorite stations is Radio Nacional de Espana (Spanish National Radio) from Madrid.  It is very strong here on 9690 kHz starting around 1645 Eastern Time, 2145 UTC.  

If you can, please listen to this station and let me know if you hear any technical problems with the signal.  Please let me know what you hear.  Does the signal sound OK.  Any problems? 

  

The End Fed Half Wave Antenna and EFHW Tuners

In the SPRAT 179 (Summer 2019) article describing their Peregrino (Pilgrim) transceiver,  Joan EA3FXF and Eduardo EA3GHS recommend the use of an End Fed Half Wave (EFHW) antenna. Their circuit incorporates an EFHW tuner and an SWR indicator.  As I planned my trip to the Dominican Republic with a uBITX, I had this antenna system idea in mind.  I was attracted by the possibility of avoiding having to carry coax with me.  And it seemed that an EFHW antenna would be easier to get up in the air than a coax-fed dipole. 

When searching for schematics for EFHW tuners I came across the QRPguys tuner kits.   

https://qrpguys.com/end-fed-half-wave-sota-antenna-tuner

This looked like just what I needed, so I ordered one.  But I placed my order kind of late, and I started to worry that I might not get the tuner kit in time.  So I decided to homebrew my own (just in case!) 

As it turned out, QRPguys got the kit to me in plenty of time. It went together very quickly and is a really useful piece of gear.  My homebrew version works fine, but I prefer the QRPguys device. 

You can check out the manual here: 

https://qrpguys.com/wp-content/uploads/2019/09/efhw_40m_tuner_assy_090119.pdf

The circuits are interesting.  The EFHW antennas present an impedance not of 50-70 ohms, but of 3000-5000 ohms.   The Peregrino and the the QRPguys circuits use a matching transformer to change the high impedance to 50 ohms.  In both circuits polivaricon capacitors are used to tune for resonance. The QRPguys circuit uses an N7VE LED absorption bridge -- I found it very satisfying to put the circuit into "tune" mode and then just adjust the capacitor until the LED went out.  That means the antenna system is presenting 50 ohms to the transmitter. 

SOTA beams has a good explanation of the EFHW antenna here: http://sotabeams.co.uk/efhw/
I did use a counterpoise. 

More DSB, from Belgium and Spain

Frank ON6UU writes:

Hello Soldermelters,

 

Maybe some interesting news for you as there are some new kits at hand from EA3GCY (http://www.ea3gcy.com)

 

I’ve made the MFT-40 DSB without any problem,  all parts were provided with the kit,  only things to buy were a microphone connector,  a speaker and an antenna plug.   The box was taken from my attic and was a VGA-selector in his previous life.

Kit came together in a few evenings,  I followed the very well written manual,  all was well pointed out,  which resulted in a working kit.  After aligning the kit I could start making qso’s.   The microphone was made from a piece of tube,  a simple switch and a electret microphone,  it doesn’t look pretty but the microphone works.

 

Rx-Tx 7.066 – 7.133  (With DDS the complete 7MHz band)

Pwr :  some 3W peak.

Double Side Band

 

Made some You-tube films about it.  

https://www.youtube.com/watch?v=fPREwd1FowM

https://www.youtube.com/watch?v=3T2dxnTmF7I

https://www.youtube.com/watch?v=eHoPdhmbZz0

 

Easy to make,  no SMD,  easy alignment without necessity of expensive material.   Fine for someone who never made a transceiver,  hence the name...My First Transceiver,  MFT.   As soon as the weather permits I will take the TRX out in the field and activate a SOTA with it.

 

Now working on the MFT-20 DSB.   I’m hoping for an 80mtr version to come available too.  :-)

 

All info is on Javier’s site. (http://www.ea3gcy.com)

 

72, 73

Keep the solder melting !!

 

ON6UU

A Mighty Mite, a BITX40, an ILER, some Arduinos, and the Joy of Oscillation in the United Arab Emirates

Martin A65DC sent us this wonderful report on his efforts in the UAE.  His e-mail nicely conveys his enthusiasm.  I was especially pleased to see that wooden enclosures are catching on (another fellow on the BITX20 group is using a cigar humidor).  Thanks Martin!  Please keep us posted on your UAE homebrew adventures.

Hi Bill and Pete,

My name is Martin, and I am listening to every episode, sometimes more than once, thank you for an excellent show boys. I am a ham in the United Arab Emirates and operate radio as A65DC.

I just wanted to share my "JOY OF OSCILLATION” moment with you, I had the moment two days or so ago.. fantastic!

Well it is not super tidy, but as a proof of concept is totally acceptable. red and green goes to the variable cap (above).

Next to the Mighty Mite (above) is my bitX40, what a fantastic board!! I have big plans for this radio. But for now it will stay in its wooden box and keeps me company.

This (above) is another kit build, 20m SSB kit from EA3GCY Javier. ILER20, please have a look, this is where you should start if you are into kit building!! the instructions are fantastic.

I added some Arduino magic to it with a SI5351, and then I was sitting and looking at my big UNO board, hmmm USB port, why not further develop the code and use the port as CAT control.

I can now connect this rig to e.g. N1MM and control it, read and write frequency (in current version) I am simulating the protocol of a TS590, but that turned out to be a bad choice, I should have gone for a simpler radio, like a 140 or something, the 590 has loads of CAT commands that my code needs to answer… this radio is my QRO 20m as rig it sports the 20w amplifier kit from K5BCQ and will put out a whooping 22w!  Several contacts from A6 into Europe and some over to Indonesia.. fun stuff, two kits from different vendors together with some own building and coding.. I love it.

On the workbench now is an Arduino CW keyed based on K3NG, the Arduino code is very well written and it has loads of functionality, most of what I will never use.. but as a keyer it is superb.

This is my keyed circuit, super simple stuff, it is here connected to the Mighty Mite as a test, works 100%  I am now researching a good circuit for a CW transmitter/transceiver for 40m that will be in the 5 to 10w range to use my new keyer with.

Again, thanks for a fantastic show guys,

73

A65DC, Martin

Pilgrim's Progress: A Peregrino Rig Concealed in a Book

On the G-QRP list guys have been talking about the Peregrino.  This is a nice little homebrew rig out of Spain.  Peregrino = Pilgrim and usually refers to people who are hiking along the Trail of Santiago that runs through the North of Spain to Santiago de Compostela.

I'm normally averse to chips, but this little rig uses two very understandable NE602s and an equally understandable LM386.  It has a homebrew crystal filter.  I like it.

GM4WZG came up with a really wonderful enclosure for his rig.  This reminded me of the time I put a QRSS transmitter inside a copy of "The DaVinci Code."

The Spanish guys have a nice site that describes the rig.  Google Translate should help, but even without it you can get most of the info you need from the schematic, chart, and foto gallery.  Check it out: http://ea3ghs.qrp.cat/peregrino.html

Enhorabuena!

Italy, Spain, Gibraltar, a Flight to Prague, and How the Mighty Mite Really Works

Gab IZ1KSW is a true Knack-afflicted member of the International Brotherhood of Electronic Wizards:  He is an Italian homebrewer who lives in Spain and works in Gibraltar.  At the end of this e-mail exchange he has a great story about reading "SolderSmoke -- The Book"  on a flight to Prague with his Greek girlfriend. It reminded me a bit of the problems I've had with fellow passengers while reading "Hot Iron" on the Washington DC train system. 

A blog post about Gab's version of the Mighty Mite is here: http://soldersmoke.blogspot.com/2015/02/iz1ksws-italian-mighty-mite-video.html
His desire to REALLY understand the circuit is, I think, admirable.  I know that my quick explanation of how the Mighty Mite circuit works isn't complete, and I'm sure that others will jump in with more details.   

........................

Hi guys,

I write to you because I'm a bit lost.

Ok, the MMM is oscillating, brilliant! 

Now I'd like to understand why it's working and how it's working.

I've been sitting on the workbench with the schematics in front of me and I found some resources on the internet, I've understood the concept of feedback loop but what really make me scratching my head is that I cannot match the MMM schematic with anyone of the typical oscillator design I found (Pierce, Colpitts, Hartley).

I've read online that it can be considered as a Pierce oscillator but from what I've found online I cannot find the purpose of the tapped coil. Maybe you can point me in the right direction before my GF starts complaining about the pile of schematics I'm accumulating in the living room!

Also, if you have any books to recommend, I'll be happy to go "back to the books"

Thank you and 73

Gab - IZ1KSW

.................

OK Gab.   I've been meaning to do this.  This little circuit needs some explanation.   I'll take a shot: 

Start by thinking of this circuit as an amplifier.  The 27 ohm resistor from the emitter to ground (negative terminal) puts a limit on how much current will flow.

The 10K resistor from the base to the positive terminal puts a positive voltage on the base and biases it so that current will flow through the transistor.

Now the fun begins!   It is an amplifier, but it has no input signal!  The input signal is the output signal -- it is like a dog chasing his tail!

The crystal is very important.  It is the main frequency determining element, and it is the conduit for the feedback that gets this thing oscillating.  It is a piece of quartz.  If you put a voltage across it, it will begin vibrating (physically) at a specific frequency.  As it physically vibrates, it also creates electrical vibrations.

So, when you turn this thing on, noise in the circuit will put a bit of charge on the crystal.  It will begin to ring, much like a musical tuning fork.  The electrical vibrations from the crystal will go to the base.  They will be amplified by the transistor and will emerge (stronger) from the collector.   From the collector, they go to the 3.579 MHz  tuned circuit formed by the big coil and the variable capacitor.

The coil wound on the film box serves several purposes. The portion of the coil between the positive terminal and the collector carries the 12V DC to the collector of the transistor.  It also carries the amplified 3.579 MHz signal coming from the collector.  This signal goes through the lower portion of the coil and causes the coil and the capacitor to resonate.  The signal at the top of the tuned circuit peaks when the tuned circuit is tuned to.... 3.579 MHz.

The capacitor/coil tuned circuit (with the tapped coil) are set up so that the right amount of energy is fed back from the output to the input, and that this energy is fed back in the proper phase relationship to the signal at the input.  Think of a child's swing at a park:  To keep the swing oscillating, you have to push at the right moment (frequency and phase) and with the right amount of energy. 

The little capacitor across the battery is to prevent "key clicks."   The output coil on the main coil takes some of the energy and sends it to the antenna while converting the impedance of the antenna to a suitable "load" for the transistor.

Whew,  how did I do?  Lots of electronics and physics in those 7 parts!

73  Bill    

................ 

Hi Guys,

 Bills explanation is absolutely perfect –but there is some additional Math in the woodworks known as the Barkhausen criteria where kB = 1

 see this http://link.springer.com/article/10.1007/s10470-008-9250-1#page-1

 73’s

Pete N6QW

...............

Well, what can I say Bill? Grazie mille!!

I keep thinking that you would have been a great teacher, you have the rare ability to explain complicated concepts using simple words. 

Yesterday I finished reading your book SolderSmoke GAWE (yes, you deserve an acronym too) and there have been several "eureka" moments while I was reading it. It gave me a lot of motivation to go in depth and understand what's going on in a circuit down to the physics of the components. I got the Kindle version but I'll order the paper version too, I love the hand make schematic and they're not very readable in the electronic version, plus I believe that a book about radio home brewing must be in the old fashioned paper version don't you think?

There's a funny story about the book. Few days ago I was on a flight to Prague with my YL, I was reading the book and zooming on the schematics to see them better, I was really into it and I didn't notice that the guy sitting on the seat next to me started to look at the kindle nervously, he probably though I was an bomb home brewer HI! So I decided to pass the Kindle to Angeliki so that she could read her books. She's Greek and she started reading a Greek book, written with the Greek alphabet which looks quite weird if you don't know it. At that point probably the guy thought to be sitting in the middle of some exotic terrorist... it was funny.

Wow... as most of the Italians do, I talked too much! Thanks again both for the big effort you make spreading the tribal knowledge with the podcast, the ARCI LBS articles and the books. 

Siete fantastici!

73 

IZ1KSW - Gab

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

El Peregrino (The Pilgrim) from Spain

Eduardo, EA3GHS, sent this to me.  It looks like a wonderful bilateral SSB rig for 17 meters.
They said they wanted a "daylight" rig (for a daytime band) because in Spain the religious pilgrims walk all day and are tired at night.  Hence 17 for Los Peregrinos!

http://ea3ghs.qrp.cat/peregrino.html



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

Meteor Shower Tonight

If the skies are clear, and if I can stay awake, I'll be out there looking for the new meteor shower. 

But there is no real need to go outside.  David, EA1FAQ has an SDR receiver tuned to a radar frequency in France.  You can see and hear the meteors as they create a path for the RF.  Very cool. 
Thanks David:

http://www.ustream.tv/channel/live-meteor-radar

You can also listen for meteor pings here:

http://spaceweatherradio.com/

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

Mars Star Party from La Palma (video)

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

An SSB kit from Spain

The ILER-20 and ILER-40 SSB transceiver kits of Javier Solans,
EA3GCY, look very interesting.

For more info: http://www.qsl.net/ea3gcy/


 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