LHS Episode #178: A Thor and A Beer

thor-s-hammer-bottle-opener-0In the latest episode of Linux in the Ham Shack, Bill plays dead for Halloween. In his absence, Russ and Cheryl discuss long-distance 2-meter communication, vanity call sign rules, Windows 10 embedding Linux, Wal-mart, Arch Linux, Norse gods, fake Mexican food and a whole lot more. Thank you for tuning in. We appreciate you!

73 de The LHS Crew


Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

Yet another Arduino clock

Does the world need more Arduino clocks? Maybe not.

But I needed another Arduino project as I had made a K3NG morse keyer. I love this keyer because it is unique in supporting a display where you can see what you send. But I wasn’t using the morse keyer all the time, so I wanted the hardware to serve two purposes. That’s the excuse for also making a clock.

Its main features are:

The hardware for the K3NG keyer includes a speed pot and a memory bank selector (to the right) as well as four push buttons on top for selecting memories. The pot now controls the intensity of the display, but the bank selector switch is not used. Of the four push buttons, only button 1 is used. With it one can toggle the clock through various displays as shown below.
Local time, solar and lunar state
Line 1: Local day, date, time
Line 2: Sunrise, maximum solar elevation (actual solar angle during the day), sunset
Line 3: Civil dawn, local time at maximum solar elevation, civil dusk
Line 4: Lunar phase, arrow showing that it is rising, days since new moon

UTC and position display
Line 1: UTC time, locator
Line 3: latitude, longitude
Line 4: Altitude, number of GPS satellites
Dual time display with local time, UTC time, and locator
What I would like to have as well is an indication of lunar visibility at the actual location with azimuth and elevation for the moon. So far I haven’t had success in finding a suitable Arduino library for that, but I’m hoping that a reader of this blog may help me.

The post “Yet another Arduino clock” first appeared on the LA3ZA Radio & Electronics Blog.


Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

Yet another Arduino clock

Does the world need more Arduino clocks? Maybe not. But I needed another Arduino project as I had made a K3NG morse keyer. I love this keyer because it is unique in supporting a display where you can see what you send.

But I wasn’t using the morse keyer all the time, so I wanted the hardware to serve two purposes. That’s the excuse for also making a clock. Its main features are:

The hardware for the K3NG keyer includes a speed pot and a memory bank selector (to the right) as well as four push buttons on top for selecting memories. These controls are not used by the clock, except for button 1. With it I can toggle the clock through various displays as shown below.
Local time, solar and lunar state
Line 1: Local day, date, time
Line 2: Sunrise, maximum solar elevation (actual solar angle during the day), sunset
Line 3: Civil dawn, local time at maximum solar elevation, civil dusk
Line 4: Lunar phase, arrow showing that it is rising, days since new moon

UTC and position display
Line 1: UTC time, locator
Line 3: latitude, longitude
Line 4: Altitude, number of GPS satellites
Dual time display with local time, UTC time, and locator
What I would like to have as well is an indication of lunar visibility at the actual location with azimuth and elevation for the moon. So far I haven’t had success in finding a suitable Arduino library for that, but I’m hoping that a reader of this blog may help me.

The post “Yet another Arduino clock” first appeared on the LA3ZA Radio & Electronics Blog.


Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

Head Copying CW

There's more to using Morse Code than Learning Morse Code

It's been about 18 months since I started learning Morse Code in order to use it for making CW contacts in amateur radio.  Learning the code allows you to recognize the letters, numbers and punctuation but it's akin to when you learned your "letters" when you were a child.  Knowing the alphabet is just the first step to "reading".  So it is with learning Morse Code.  



When I started making contacts using CW it was fairly formulaic. I even had my QSOs written out with regard to what I was planning to send and what I expected to hear during each exchange. 

But then my copy and sending speed increased beyond 17-19 words per minute and I could no longer type or write down what I copied fast enough to comprehend and I began to head copy.

Head Copying

Head copying is when you stop transcribing what you hear and listen to it as you would a conversation and only take notes on salient points.  This was a big step for me and it has been a difficult transition.  

Using Morse Code to communicate at speeds faster than it can be written straddles the weird place between hearing and reading.  We learn morse code by its sound but at slower speeds, say below 30wpm what we are "hearing" is letters, not words so we are having to buffer those letters in our head to spell words.  When we "listen" to someone speak we are not hearing them speak letters but complete words, when we "read" our brains are not looking at individual letters but at complete words.  When we hear Morse code at 20-25 wpm we are hearing very slowly pronounced words and it is a new skill that has to be learned.

This skill is necessary for ragchewing.  A ragchew is a long QSO between two amateur radio operators. This is generally what amateur radio operators are doing on the radio when they're not contesting, ...


How to practice for a ragchew

So after you learn the code, how do you learn to use it in a conversation?  

I struggled with copying ragchew QSOs at 20+ words per minute for most the spring and early summer of 2016.  Just listening to QSOs alone wasn't cutting it for me.  During my lunch time at work I began regularly using my CW training application on my phone to send the top 500 words at 25wpm and it has been a big help to me.  

I had to learn the skill of not just recognizing letters but holding what I was hearing in my brain long enough to turn it into a word and just as importantly not to get hung up on a word that I couldn't immediately recognize but let it go and pay attention to the next.  To me, this has been a bigger learning curve than recognizing the alphabet and numbers at speed.

In addition to learning to buffer the letters until they form a word I must also keep the slowly accumulating set of words in my head until it forms a sentence or makes sense as to what is being communicated.  
THIS IS COMMUNICATION with Morse Code and it is different than anything else we are familiar with so treat it as learning a new skill.

Now if all you are trying to do with CW is contests, you don't need this skill.  You just need to be able to copy a call and whatever designators are sent after it for the contest rules (state abbreviation or a contest number or grid square) and get it copied into your logging program.  But if you want to communicate at speeds above 20wpm you will need this new skill.

Next steps

After you've practiced with machine sent top 100 or top 500 words you'll still need time copying actual QSOs because more often than not, most operators you will communicate with have lousy spacing and run their words together or use so many abbreviations that you'll have to learn to hear the abbreviations as new words.  When I work an operator who runs things together I'll first try to really exaggerate my word spacing during my exchange to give them a hint and if that doesn't work I ask them put more space between their words.  Some will comply, but some folks just don't seem to know how to leave space so I'll catch what I can, politely respond to what I could understand and then move on.

So if you're getting discouraged when you reach a wall of comprehension, try the steps above and with time I think you'll find your comprehension during a ragchew improving and it will take you to a new place in the hobby.

That's all for now

So lower your power and raise your expectations... and put extra space between your words!

73
Richard AA4OO

Update 11/7/2016:

KA8BMA pointed me to a nice reference created by W0XI for the top 100 "Ham Words" used in QSOs... check it out most common ham words

Richard Carpenter, AA4OO, is a regular contributor to AmateurRadio.com and writes from North Carolina, USA. Contact him at [email protected].

Amateur Radio Weekly – Issue 132

HDSDR beta 2.75 released
HDSDR hasn’t been updated since 2013, so it is good to see that the author is back in action.
RTL-SDR.com

Put that Amateur Radio license to use on 915 MHz
Faraday makes it very easy to transmit and receive digital data, with decent power and range.
Hack A Day

Learning Morse Code in 4 hours
Researchers at the Georgia Institute of Technology have developed a system that teaches people Morse code within four hours using a series of vibrations felt near the ear.
Georgia Tech

National Geographic: Guide to Ham Radio
Can Ham radios really talk to space? And other answers.
National Geographic

Suspected terrorists believe HAARP controls minds
Two men collected dozens of weapons as part of a plan to attack the High Frequency Active Aural Research Facility or HAARP.
WALB

SainSonic APRS Tracker
1 watt APRS tracker with GPS, Bluetooth built-in.
SainSonic

KB6NU’s One-day Tech class videos
KB6NU has been sharing a series of videos from his One-day Tech class.
KB6NU

ISS APRS packet system switched to UHF
Crew member Shane Kimbrough, KE5HOD, has activated an ARISS UHF radio that had been in storage on the ISS, and it is now operational on 437.550 MHz.
ARRL

An improved knob for the K2
Compared to tuning knobs on most commercial rigs, the one on the K2 has a rather sharp edge, the effects of which can become obvious if you tune a lot by resting one finger against it.
AA7EE

Do you have a prepared Ham Radio elevator pitch?
Don’t try to be all things to all people, stick with the aspects of ham radio you enjoy and have passion and expertise.
Ham Cram

All-Seeing Eye: Russia builds gigantic military radar in Arctic
The so-called “over the horizon” radar is a type of radar system, which is able to detect targets at very long ranges, typically hundreds and thousands of kilometers.
Sputnik News

Video

Building an APRS Digipeater
The transceiver is a GM300, with a KAM plus TNC modulating it. If we didn’t happen to have a KAM+ on hand, I would have probably used an OT3m from Argent Data.
The Life of Kenneth

TYT MD-398 GPS Unboxing
This model is the GPS version. It also comes in a version without GPS. This is a pre-release model, however, it is identical to the Radioddity GD-55 model.
Ham Radio Review

W9BVX’s helium balloon vertical antenna
Watch now as he ticks another item off his ‘bucket list’.
KB8VBR

Radio Review: QYT KT8900 Mini Dual Band Mobile
Programming repeaters into the QYT KT8900 Mini Dual Band Mobile
AF5DN


Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.

TX Factor Episode 13 is Live!

We have an autumn feast of amateur radio content in this ‘13 – lucky for some’ episode of TX Factor!

Bob gets to weigh up the latest offering of digital transceivers with Gary from ML&S.

We chat about the weather with two experts who always look on the bright side. Jim Bacon and Steve Nichols explain how we can work with the prevailing conditions to maximise our chances of good DX.

And Bob realises a boyhood dream by reliving the heady days of offshore radio on the UK’s high seas.

The Show is available to watch now at www.txfactor.co.uk

We hope you enjoy this nostalgic show.


Nick Bennett 2EØFGQ co-hosts TX Factor with Bob McCreadie GØFGX and Mike Marsh G1IAR. Contact the team at [email protected]

Worldwide SDR’s Online

The University of Victoria online SDR from SDR.hu
A posting today on Yahoos' ndblist Group by Geir, LA6LU, pointed to a list of online SDR receivers at various locations around the globe. I have seen similar lists like this in the past, only to be disappointed when finding many of the receivers impossible to get operating or arriving at a dead link. This list appears to be up-to-date as a quick check of four random receivers saw all four come to life quickly!

The site is run by Andras Retzler, the author of the OpenWebRX software that enables these SDR's to be made seamlessly available online through your web browser. Since all of the sites use the same software, all receivers appear the same, thus providing a very short operational learning curve. At the time of this posting, there were 76 online SDRs, a number that fluctuates slightly throughout the day. Conveniently, the site also indicates how many users are currently using any individual receiver.

I can think of several very handy uses of such a resource, from checking your own on-air signal to confirming, in real time, a suspected DX catch that you might be hearing from your own location. You may even be interested in putting your own SDR online for others to share. It really is a very useful resource and while there, check out the rest of Andras's interesting site.

Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

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