Open Circuits: The Inner Beauty of Electronic Components

I was not going to buy this book.   But then, Elisa and I were in a book store and there it was.  I decided to take a look.  I opened it to a random page:  2N3904.  TRGHS.  Sold.    

It is really interesting. 

You can order yours through the Amazon Search block in the right side column of the blog.  

https://spectrum.ieee.org/open-circuits

SolderSmoke Re-Play: Goggle EMBRACES Morse Code: Gmail Tap

Wow!  CW finally gets some respect from the Silicon Valley guys!  There is actually a Vibroplex bug in this video.  And they note how USEFUL this will be for those afflicted with Fat Finger Syndrome (Pete's Disease). FB Google!  TNX! 

I was feeling kind of bad about the fact that there was one year in which we didn't do something special on the first day of the fourth month.  That year was 2012.  But looking back, we kind of did! The very next day, we posted this really awesome video from the folks at Google:

 https://soldersmoke.blogspot.com/2012/04/google-cw.html 

 

A True Measure of a Jean Shepherd Fan: Did You Fly One of His Ornithopters?

 

I did.  Shep had as a sponsor the maker of a flying bird.  It was a wind-up ornithopter powered by a rubber band.  It was kind of like the one in the picture, but I remember mine as being yellow.  My dad got it for me after hearing Shep talk about it on his program.  Wow, what a sponsor!  Shep must have made DOZENS of dollars from that deal! 

It looks like Shep was pitching this thing in 1972, which was my first year in high school.   

https://www.flicklives.com/index.php?pg=331&recno=5619

It took some coaxing and adjustment, but it did fly. 

My thinking about this was prompted by an article on Hack-A-Day:  

https://hackaday.com/2023/01/16/flappy-bird-drone-edition/

(I want to hear that program about the wedding on 75!)

EXCELSIOR!

Working Walter KA4KXX from Hispaniola

 Walter KA4KXX in Orlando has been a prolific builder of rigs for many years, and has been a great friend of SolderSmoke:  Here are some of the SolderSmoke podcasts and blog posts in which Walter's solder melting was mentioned: https://soldersmoke.blogspot.com/search?q=KA4KXX

As we approach the end of our current stay in the Dominican Republic, I could not miss out on the chance to work Walter with his homebrew rigs.  Even though the space weather was stormy, and my dipole was droopy, we arranged to meet up on the high end of the 20 meter CW band this morning.   See the results in the video above.  A solid QSO with Walter.  He says it is HB2HB, but truth be told I was on a uBITX that was built more by Farhan than by me.  But this was a great contact.  Walter started with a 50W rig, then switched to his 3 watt rig with a DC receiver.  FB

Here is the e-mail I received from Walter after the QSO: 

Dear Bill:

Many thanks for the great video, and when

you return to Virginia look for your mailman

to bring a postcard from me!

Just after your phone call this morning I scanned

the band from 14.025 to 14.300 and heard only one

SSB QSO at 14.347, and even now I only hear

a half dozen SSB signals, so that makes what

we did even more amazing. 

The first photo below is my 3.5 watt NE602 direct conversion 

rig which is about 2 years old.  The transmit signal is created

by putting a 3 MHz VFO signal into an NE602 mixer with an 

11 MHz crystal, so the rig can receive CW and SSB from 

14.025 to 14.300 and can transmit CW anywhere in that range

with good frequency stability. 

The bottom photo is my new full break-in CW 50W rig which 

I just put on the air about a week ago and is still in the finalization stage.  

I am not yet happy with it, but then again I am more particular

now than I used to be.  It is really a trans-receiver with a single 

conversion superhet receiver at the bottom of the board using 

an NE602 pair with a 3-crystal 4 MHz 900 Hz bandwidth filter, 

and a single 10.080 crystal VFO which is tuned with a polyvaricon

for operating between 14.061 and 14.068 MHz.  

At the top is the VXO transmit section using a pair of 14.070 

crystals pulled down into the operating range.  This signal

is buffered and amplified to about 500 mW which is all that 

the MRF101 RF Power Amplifier needs.  Visible behind the

board is an AC-powered 24 VDC switching power supply which 

is connected in series with the 12 VDC battery to 

power the final stage with about 36 VDC.  The main 12 VDC is 

provided by a bench power supply which is not in the photo.

In both rigs the morse code key is the microswitch 

at the lower right corner.  (Way more handy and elegant 

than your key, I might say?)

This morning each of these rigs was connected to its own

end fed half wave antenna, one in my backyard 

and the other on the side of my house.  My antenna analyzer

shows them to be essentially equal, but my 50W rig does

not like one of them at all.

Making our international homebrew-to-homebrew contact 

today was a terrific ham radio experience, so thanks for all 

you do!

73,

Walter 

KA4KXX

Orlando, FL

Working Vienna Wireless Society member (KA4CDN) from Hispaniola

We'll be heading back to the States soon and I was feeling guilty about 

not having worked anyone from my home club (the Vienna Wireless Society). 

On Wednesday night I Zoomed in to the club's Maker group -- this made me want 

to make at least one contact with the club.  Plus Walter KA4KXX  in Orlando has 

been trying to set up a sked on 20... This morning I saw that the SFI was up above 200. 

I lengthened the dipole so it would resonate on 20 meters (on this trip it started on 20, went to 17, back to 20, down to 10 and now, back to 20!). I worked one station on SSB, then sent a text to the club's DX spotter group, saying that I would be calling CQ on 14.060 MHz.   Soon I got a call from club member (and Maker) Mike KA4CDN.  We had a nice QSO.  Thanks Mike (video of our QSO above). I will try with Walter tomorrow.  

 

On Ten Meters with a uBITX from the Eastern Tip of Hispaniola

On ten from HI7.  Cluster spots, DX, CW, and the Reverse Beacon Network. 

 

SolderSmoke Re-Play: Shep tries to build a Heising Modulator -- Shep on Parasitics and Troubleshooting: "That way madness lies"

You guys really have to listen to this.  This is culturally important.   

In this 1965 radio broadcast, Jean Shepherd describes his teenage struggles with parasitics and other technical problems in his homebrew 160 meter transmitter.

He describes the sound of parasitics on a signal, saying that they sound as if the signal is being attacked by "debauched erotic locusts."

He really nails it in describing the scornful, dismissive tone that many hams use in telling their fellow radio amateur that there are problems with his signal. ( I have recently been on the receiving end of this kind of treatment.)

He observes that no one is more worried, "than a man who has built something and can't get it to work." Indeed.

During a date with a girl from his high school, he is so obviously preoccupied with his transmitter trouble that she tells him that something is wrong with him and that his mother "should take him to a doctor."

And he describes the joy that comes when you figure out the problem and get the thing to work.

The REALLY good stuff begins at about the 25 minute point.

http://ia310115.us.archive.org/2/items/JeanShepherd1965Pt1/1965_01_29_Ham_Radio.mp3

Shep was quoting from King Lear: "O, that way madness lies; let me shun that; No more of that."  In other words: "BASTA!"  

EXCELSIOR!

Other Workshops: Building a Flying 21:1 Scale Airbus A-380

This is simply awesome.  At almost every minute of this video, I found myself thinking, "Yea, I'd screw that up."  Even the simple stuff, like cutting out the cockpit windows: "Yea, I'd screw that up too."

More info on the builder: 

https://www.famousbirthdays.com/people/ramy-rc.html

https://web.facebook.com/Ramy.RC.airplanes/?_rdc=1&_rdr

Arnie Coro CO2KK -- Homebrew Hero -- Silent Key

I was sorry to read this morning of the passing of Homebrew Hero Arnie Coro CO2KK.  As we see in one of the obits, Arnie got his start in radio at age 12, with the gift from his father of a chunk of galena, a coil, and some headphones. 

Here are some of the SolderSmoke posts about Arnie:  

https://soldersmoke.blogspot.com/search?q=CO2KK

He will be missed. 

A Really Great Podcast: 90th Birthday of the BBC

 Listen!

https://www.bbc.co.uk/sounds/play/w3ct4lzh

Dilbert Knack Video: Who was the "Doctor"?

I was looking at this again and I realized that there was more to it than I thought.  Who was the "doctor" who was filling in for their regular doctor?  

Happy New Year and Straight Key Night from HI7/N2CQR

HNY from HI7!  In keeping with SolderSmoke tradition, I recorded the above greeting.  If you look over my right shoulder, or in the picture below, you can see the apartment building we will be moving into (at least for the winter months) later this year.  There will be a small shack on the top level.  And yes, a telescope.  

This morning I fired up the uBITX on 20 CW and made two Straight Key Night contacts.  My key is the straightest of the straight --  a homewbrew thing made from an old hack-saw blade,  copper tape, brass screws, scrap wood, and duct tape.  Picture below.  

73 to all!  HNY and good luck in 2023!