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Tuesday, December 31, 2019

The January/February 2020 Communicator



Here is the Latest SARC Communicator

Projects, News, Views and Reviews... 


Happy New Year from all of us here at SARC!



Here is the January/February 2020 SARC Communicator newsletter: 







This edition has 75 pages of projects, news, views, and reviews from the SW corner of Canada. 

  • VY0ERC: What is life like at the farthest north Amateur Radio Club in Canada?
  • Building a moonbounce (EME) station on VHF
  • Make a 6m receiver with Arduino and a handful of parts
  • A 3-pin radio IC
  • A soldering primer
  • Remote rotator control
  • AA-600 Antenna analyzer review
  • The BC QSO Party 2020
  • Tech tips
  • No-ham recipe
  • and much more!


Past articles and issues are available on our blog at https://ve7sar.blogspot.ca

We always welcome contributions of news, stories and your Amateur Radio experiences. The deadline for the next issue is February 15th.

73,

John VE7TI
Communicator Editor

Sunday, December 29, 2019

The SARC CW Course


Morse Code Is Not Dead!

CW – the Original (and arguably, the best) Digital Mode

Invented in 1837, CW which is more commonly known as “Morse Code”, was the very first mode of communication sent over a wire or airwaves.  It is called CW or “continuous wave” because it is an unmodulated radio wave of constant amplitude, though it might more accurately be called “discontinuous wave” since the wave is broken into short and long segments separated by spaces, to represent letters of the alphabet, numbers and punctuation marks.  It is legitimately a digital mode because it exists in only 2 states  –“on” or “off”.

The length of the dot (or “dit” as we prefer to say) and dash (or dah)  and the spacing between them is not arbitrary but has a fixed relationship.  If the relationship is not accurate, the quality of the CW will be recognized as “poor” and in extreme cases may be virtually unreadable.  While most CW heard nowadays is created by software and is therefore perfect, we occasionally hear on the radio less-than-perfect Morse Code, sent by operators still using a mechanical device such as hand key or bug.

Since CW has largely been abandoned by the commercial, military and transportation world, it is now virtually within the sole domain of amateur radio operators, whose passionate adherents will likely stand by it to the bitter end.  So, if you think CW is dying out, then listen on the 20 m band during one of the many CW contests throughout the year.  You will be amazed at the number of CW operators sending Morse Code at rates between a lazy 15 wpm and the a breakneck 50 wpm or more, from every corner of the world.  

If you wish to use radio to communicate by the most reliable and sensitive means, you will not use CW at all, but instead one of the modern “weak signal” digital modes such as FT8, JT65 and a whole slew of others,  which have transformed our ability to accurately copy signals which may be so weak that you cannot actually hear them.  This is a boon to communication as it allows information to be exchanged even when using low power transmitters and poor antennas – unavoidable for condo dwellers.  So these forms of digital certainly have their benefits.  

However, if you wish to enjoy amateur radio in the most traditional, challenging and enjoyable way, you will find CW is the method of choice.   Yes, you can deploy digital decoders to help you read CW on a computer monitor, and many do.  However, even the best digital decoders are inferior to your ears and brain working together.  So if you are serious about using CW, you really must learn to copy it by ear.  

As a beginner, you will likely start with a hand key to send the characters which require a separate wrist movement for each dit and each dah.   In the past, CW operators would typically graduate to a semi-automatic key called a “bug” which sends a series of dits when the paddle is pushed one way, but single dahs when pushed the other way.  That certainly takes some of the work out of sending.  Actually very few CW operators now use a bug although the holdouts can still be heard on the airwaves.  

CW sent by a hand key or bug is usually distinctive of the operator and can often be recognized in the same way that a person’s individual handwriting differs from that of others.   During WW 2 the identity of German and British radio operators could often be recognized by their “fist” i.e. individual way of sending code characters.   



Hand key

  
Semi-mechanical Vibroplex “bug”

Nowadays, 95% of CW operators use a paddle and electronic keyer to send CW.  This combination is a big step up from the hand key and bug because it allows sending virtually perfect CW, which means the dits and dahs are of the correct length and spacing.  The keyer can be a separate unit into which you plug your paddle or, more commonly, it is built into the transceiver.  You push the paddle one way and it makes a string of dits; push it the opposite way and it makes a string of dahs.   It is not difficult to master and the result is uniform and perfectly formed CW.


Kent paddle



Bencher paddle



Electronic keyer with built-in paddle



External Electronic keyer which requires a separate paddle

You may occasionally hear about “iambic keying” which allows the keyer to minimize the keystrokes or hand movements even further.  To visualize how it works, consider the letter “C” which can be sent iambically by merely squeezing the two paddles together. With a single-paddle or non-iambic keyer, the hand motion would require alternating four times for C (dah-dit-dah-dit).  Most CW operators have not mastered this technique and it is not recommended for beginners.

If you’re stuck in a rut and looking for a new and challenging experience, consider learning CW.  Persistence and practice will get you through in the end and you will be ready to join the select group of hams known as “CWers”.  I heartily recommend it.

~John VA7XB







Tuesday, December 24, 2019

We Wish You Joy!



And perhaps a Ham toy in your stocking




We here at

Surrey Amateur Radio Communications
wish you a joyous holiday season and
a very happy and prosperous New Year!

An old favourite:


'Twas the night before Christmas,  
And all through two-meters,  
Not a signal was keying up  
Any repeaters.

The antennas reached up  
From the tower, quite high,  
To catch the weak signals  
That bounced from the sky.

The children, with Basic,  
Took their HT's to bed,  
And dreamed of the day  
They'd be on HF, instead
.
Mom put on her headphones,  
I plugged in the key,  
And we tuned 40 meters  
For that rare ZK3.

When the meter was pegged  
By a signal with power.  
It smoked a small diode,  
And, I swear, shook the tower.

Mom yanked off her phones,  
And with all she could muster  
Logged a spot of the signal  
On the DX PacketCluster,

While I ran to the window  
And peered up at the sky,  
To see what could generate  
RF that high.

It was way in the distance,  
But the moon made it gleam -  
A flying sleigh,  
With an eight element beam,

And a little old driver  
Who looked slightly mean,  
So I though for a moment  
That it might be Wayne Green.

But no, it was Santa,  
The Santa of Hams,  
On a mission this Christmas  
To clean up the bands.

He circled the tower,  
Then stopped in his track,  
And he slid down the coax  
Right into the shack.

While Mom and I hid  
Behind stacks of CQ, 
This Santa of hamming  
Knew just what to do.

He cleared off the shack desk  
Of paper and parts,  
And filled out my late  
QSLs, for a start.

He ran copper braid,  
Took a steel rod and pounded  
It into the earth  
Till the station was grounded.

He tightened loose fittings,  
Re-soldered connections,  
Cranked down modulation,  
Installed lightning protection.

He neutralized tubes  
In my linear amp...  
(Never worked right before –  
Now it works like a champ).

A new low-pass filter  
Cleaned up the TV.  
He corrected the settings  
In my TNC.

He repaired the computer  
That wouldn't compute,  
And he backed up the hard drive  
And got it to boot.

Then, he reached really deep  
In the bag that he brought,  
And he pulled out a big box.  
"A new rig?" I thought!

"A new Kenwood? An Icom?  
A Yaesu, for me?
An Elecraft, TEN-TEC
Or Flex, could it be!"  
(If he thought I'd been bad  
It might be QRP!)

Yes! The Ultimate station!  
I suddenly got nervous?  
Could it be all those weekends
I worked Public Service?

He hooked it all up  
And in record time, quickly  
Worked 100 countries,  
All down on 160.

I should have been happy.  
It was my call he sent.  
But the cards and the postage
Will cost a month's rent!

He made final adjustments,  
And left a card by the key: 
"To Gary, from Santa Claus. 
Seventy-Three."

Then he grabbed his HT, 
Looked me straight in the eye, 
Punched a code on the pad, 
And was gone - no good bye.

I ran back to the station, 
And the pile up was big. 
But a card from St. Nick  
Would be worth my new rig.

Oh, too late, for his final
Came over the air.  
It was copied all over. 
It was heard everywhere.

The Ham's Santa exclaimed
What an old ham expects: 
"Merry Christmas to all, 
And to all, good DX."

© 1996, 2016 Gary Pearce KN4AQ 



And here is a previous post from Christmas 2017:




Thursday, December 19, 2019

Back To Basics: Voltage Measurement



How is a voltmeter usually connected to a circuit under test?

Question B-005-013-001 - From The Canadian Basic Question Bank

A handy thing to know, particularly as basic digital multimeters (DMMs) are now very inexpensive, usually less than $10., and can be useful for many things around the home like checking the condition of batteries.

The two types of voltmeter you may encounter are digital and analog.  Analog meters are recognizable by their printed scale and a moving needle. 

Voltage is always measured in parallel with a device, current in series. If you recall Ohm’s Law in your (Canadian) Basic Qualification, you will remember series, parallel and series-parallel circuits. If not, check this link:  http://www.physicsclassroom.com/class/circuits/Lesson-4/Two-Types-of-Connections




On the meter, first set the knob to a voltage range greater than the expected voltage. If you don’t know what to expect, set it to the highest range.  DC Voltage range has a V- with a straight line next to it, AC generally a V~ with a wavy line. For example, 2V measures voltages up to 2 volts, and 20V measures voltages up to 20 volts. In our circuit the meter is hooked up in parallel to measure the voltage of the component under test.

The correct answer therefore: In parallel with the circuit.

~ John VE7TI





Sunday, December 15, 2019

Earth At Night!


A Free NASA eBook 

Earth at Night, NASA’s free new 200-page eBook in three formats, is now available online showing our planet in darkness as captured from space by Earth-observing satellites and astronauts on the International Space Station over the past 25 years.

Aside from the fascinating photos, there are explanations of Earth's weather as well as the Aurora and other phenomena of interest to the Amateur Radio Community




Thursday, December 12, 2019

A SARC Basic Course Retrospective





A Message From A Successful Teen Ham


Hello, readers. I’m Samantha, I’m sixteen years old, and this May I got my amateur radio basic license - with honours, too. Finally entering the world of amateur radio came with a lot of passion, learning, and a bit of studying, and having a gate wide open to another enormous world of learning is perhaps one of the things about having a license I’m most excited about. Though I’m proud about my achievement, I have to thank Surrey Amateur Radio Communications Basic radio course for my success.


Sammi and Member of Parliament Sukh Dhaliwal
at Field Day 2016
SARC sets up a course so amateurs-to-be can prepare for their license test. It went through all the topics we needed, through on-air etiquette and the long list of laws, among more interesting things like electric theory and propagation (man, those are fascinating topics). However, what I appreciated most in the course was the caring environment, where asking questions, talking with others, and even joking around a little is perfectly normal. 

I felt very welcome in the class – though being the only girl in the class was a little disappointing – and I especially want to thank John VE7TI, Stan VA7NF, and John VA7XB for all being incredibly knowledgeable, kind, and personable. It helps when a learning environment is friendly; I don’t think I could learn if it isn’t. In fact, it’s wonderful that amateur radio in general is so friendly to everyone.



Noah, age 13, a graduate of our Fall 2019 course,
at 27 students, our largest class ever.
His dad [right] who also graduated from this class,
and one of the instructors John VE7TI

See, the thing about the world of amateur radio is that it’s just so big. If you don’t like one aspect of it, there’s going to be another that piques your interest. Plus, it’s not just a hobby for one type of person or one type of community. Anyone, and yes, I mean anyone, can get a license. Doesn’t matter if you’re old or young, male, female, neither, or both; what matters is that amateur radio is interesting to you, even if it’s just digital radio or only using a phone mode. My hope is that other teens like me discover this community and, like me, fall in love with it and all it has to offer, because this world isn’t dying. As long as we’re around, we’ll make sure to let it thrive.

~ Samantha VA7HBE



Our next course starts February 25, 2020 at 6:30pm



For more information email: course@ve7sar.net






Sunday, December 8, 2019

Our Field Day Success!


Another First For The SARC-SEPAR Team

We just got the results from 2019 ARRL Field Day, VE7SAR achieved top score in Canada (again) for 3A. Great work and congratulations to the SARC & SEPAR team members.




How did we accomplish this again?

Our planning this year followed the Incident Command System (ICS), a structured means of planning and staffing a large event. Our ICS approach to planning was described in detail in a previous post.



CQ CQ CQ

A Look At Modulation

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