Posts Tagged ‘CW Morse’
Two Baluns in One
|Elecraft BL2 kit|
According to an email correspondence with Gary (AB7MY) at Elecraft...
- The ground lug is there to be used to bleed off static voltage on an antenna that is not DC or earth grounded.
- We don't recommend using the balun with an end fed wire. It will have too much loss. The balun is for use with a balanced antenna and a low impedance of 200-300 ohms or less.
The "Nifty Accessories" KX3 stand
|Nifty Accessories KX3 stand|
The Elecraft KX3 is naturally at home in the wild
|The upward facing display of the KX3's short legs is ideal for remote, portable operations|
But on the desktop it's short stuff
|The KX3 on my homebrew stand|
The KX3 "Iron Throne"
One Suggestion... replace the paper clips
Elecraft AF-1 Audio Filter Kit
|Elecraft AF-1 Audio Filter Kit|
Building the kit
Real world antenna comparisons
|Two highlighted records show the difference when I switched antennas and moved the transmit frequency slightly to cause a new report to be sent|
Vibroplex Bug Morse Keys
|Vibroplex Original Semi-automatic Bug|
The Vibroplex semi-automatic Bug is considered a manual key by the SKCC (Straight Key Century Club) so it counts in SKCC contacts.
|Wrap the pendulum weight with solder to slow it a bit|
Here is a video running through the keys to see if learning a Vibroplex messes up my ability to use a paddle with an electronic keyer
The Vibroplex Bug next to a Kent Hand Key.
|Manual Morse Code Keys|
Amaze your friends / Confound your enemiesOk so maybe all the cool kids aren't doing it... who wants to be a cool kid anyway? They have issues.
So whats up with all this beeping?
Morse code is fundamentally a method of encoding every letter in the alphabet plus numbers and punctuation as two pieces of data. Two sounds actually, one 3 times longer than the other. If you were to speak the two sounds out loud one would sound like DIT and the other DAH. That's it. That's all you have to know. Two sounds, one 3 times longer than the other. There, and you thought this would be hard? Pah!
|Beep Beeeeeep -- There you have it... Morse Code. Any questions?|
Why is it called Morse Code?
Why learn Morse code?
CW is small but powerfulCW uses between 100Hz and 150Hz of bandwidth compared to 2400Hz - 3000Hz used by phone modes. That makes it about 20 times more efficient, or put another way, your signal to noise is improved by a factor of 20 over phone. It's also easier to copy (interpret) a CW signal down in the noise than a spoken voice.
So you want to learn "the code"
A "C" in Morse Code sounds like DAH DIT DAH DIT. It has a beautiful rhythm when you listen to it out loud. Go ahead and shout it out, you've got nothing to lose at this point.
So, if you have toyed around with learning Morse Code and have some visual chart with dots and dashes. Shred that chart right now. Go ahead and do it. I'll wait... Did you shred it? Ok let's proceed.
One wrong way
Morse Code was a requirement for my General amateur radio license in 2006, but I only had to prove copy skills at 5 words per minute. Someone recommended a set of tapes that employed mnemonic phrases to memorize each letter. Basically each letter "sounds" like some phrase. I'm going to tell you one of the mnemonic phrases as an example but please immediately erase it from your memory because it takes a long time to un-learn this method. The letter "Y" sounds like the following phrase said out loud "Why did I die?" OK, now just imagine you've memorized some phrase like that for every letter of the alphabet and punctuation mark. Now every time you hear a letter in Morse Code one of these phrases runs through your head and you have to let it run its course before the letter pops out on the other side of your consciousness. You can understand how crippling this becomes when the speed goes above 5 words per minute. Trying to counts DITs and DAHs hits the same wall.
One right way
I'm not going out on a limb to say there is only one right way to learn Morse Code so I will say that what follows is "One right way" to learn the code and it is working for me.
This method is recommended by the ARRL and is implemented by many applications used for Morse Code training. This allows you to learn the sound of the letters at the full target speed you want to operate at. If you learn the sound of the letters at 13wpm then you will find yourself stuck there until you relearn them at a higher speed because you're learning to recognize sounds, not DITs and DAHs. Our brain has an easier time of slowing a sound down than speeding it up so if you start at the target speed the slower speeds will work themselves out. I started with a target speed of 18wpm and I am kind of stuck there right now, while learning the sound of the characters at a higher speed to progress. I wish I had originally chosen 20wpm as my target speed because in my experience that is a common speed in many QSOs.
Farnsworth MethodLearn the sound of the letters at the full target speed you wish to be able to copy.
Keep the speed of the letter spacing (silence between the letters) to be at your current learning speed to give you thinking time. I.e. you're letter spacing may be set at 8-10wpm to start out with while you're actually learning the characters at a target speed of 20wpm.
Your training should also incorporate the Koch Method which directs the order in which you learn the letters, numbers and punctuation and determining when to progress to the next element.
Koch MethodBegins with just two characters (K, M). Once strings containing those two characters can be copied with 90% accuracy, an additional character is added, and so on until the full character set is mastered.
Code TrainerI looked at a number of different code trainers. I tried PC applications, mobile device apps and internet based applications. I live in a very internet connected place and I nearly always have access to the internet. I don't always have my PC with me but I do usually have access to a guest PC or a mobile internet capable device so I chose a website that has a training application that incorporates both the Farnsworth and Koch methods and would keep track of my progress.
Learn CW Online http://lcwo.net/
Learn CW Online is a really nice Morse Code tutor. You create a login for it to keep track of your progress and settings for character speed and effective speed. It has multiple ways to train so try the different ones out to find out what works best for you. I used the Koch Method CW Course which is accessible after you log in. It starts out with two letters and keeps track of your accuracy, making suggestions as to when you should add an additional letter. There are 40 lessons in that course which include the alphabet, numbers and punctuation. I've read that other people really like the MorseMachine application on that site.
After you've gone through all 40 Koch lessons you may still have trouble with a particular set of characters. Use the Code Groups application to work through your stumbling blocks. Lastly natural language training is provided in the plain text training application which sends real sentences at your speed settings. You can also paste text into the convert text to cw application and download the resulting MP3 to practice off-line.
Listen to real QSOs
Secondly you'll begin to start copying the myriad of abbreviations and prosigns and jargon used during QSOs that exists nowhere outside of amateur radio CW conversations. As you come across new "words" that you copy. Circle them until you begin to recognize what they mean. Some of the abbreviations are standardized but many others are just shorthand and sometimes unique to a particular operator or region. You'll also start to become familiar with the way operators communicate their goodbyes which vary greatly in content, abbreviations and length. Some goodbyes in morse code seem to take as long as the entire previous part of the QSO. In other cases the conversation ended and you didn't even hear the door slam behind you.
A word about Morse Code translators
Pace yourself and have fun
Morse Code is a mode for folks that don't have a lot to say but want to take a long time to say it; so why rush?
Sending Morse Code
Personally, I'd recommend that you hold off practicing sending code until you have worked through all the lessons and can properly copy. Your brain needs time to memorize the proper sound for each letter. If you start practicing too soon you could develop poor timing habits that will take time to correct.
I have had a little over 300 CW QSOs now and while that is still a relatively small number easily a 3rd of them have been lengthy ragchews lasting over 20-30 minutes so I've spent a lot of time "off-script" from the standard exchange. At this point I don't have to concentrate much on what I'm sending, it just comes out. I only have to think about spelling long words.
Remember the golden rule. It's better to send good code than receive.
What kind of key
The video below discusses some difference in learning to send on a straight key versus a paddle...
|Straight Key (manual key)|
Straight keys are simple, inexpensive and can work with many inexpensive practice oscillators such that you don't need a radio to practice sending. The disadvantage of straight keys is that your reflexes are entirely responsible for properly spaced DITs and DAHs in addition to intra-character and word spacing. The advantage is that after some practice they become an extension of your arm and simply repeat what you're hearing in your head. I personally started with a straight key and still like to use one for the majority of my QSOs but it's a personal preference.
Paddle with electronic keyer
|Paddle -- requires electronic keyer|
A paddle works with an electronic keyer. The disadvantage of a paddle is it requires additional equipment and that you will be learning a different reflex from the actual code that is in your head. I.e. when you send an I or an S or an H you are not reflexively sending the DITs that make up the letter but are instead training yourself how long to depress the paddle for the string of DITs. This is a new skill and doesn't directly correspond to what you hear in your head. The advantage to using a paddle with an electronic keyer is that the keyer will send perfect length and ratio DITs and DAHs every time so your reflexes don't have to be as quick or precise. Also it requires far fewer movements of your hand to send code with a paddle and you won't tire as quickly as you would with a straight key. I won't go into the concept of squeeze keying here. For now don't worry about it.
As to the specifics of using a paddle with a keyer:The electronic keyer may be external or built-in to the radio. If it's external then it will normally have a speaker or mic jack to provide a sidetone allowing you to practice without connecting to a radio. If you don't have an external keyer and want to practice with a paddle you will need a radio with a built-in electronic keyer and be aware how to set it to not transmit for practice. Usually this is accomplished, strangely enough, by turning off VOX (which stands for voice activation) in the radio's menu. Keyers have a speed setting and weighting. Speed seems pretty obvious. Weighting is the ratio of the length of the DIT to the DAH in length. In general the weighting should be set to a higher value when you are sending at a slow speed and set to a lower value as your speed goes up.
Your first on-air QSO
You are ready to venture into your first, heart pounding, fight or flight response on-air QSO
If none of those options present themselves then just go for it on-air. Find an ongoing QSO that you feel you can copy or is moving just slightly faster than you can copy. Copy the call-sign of the station you can best copy and wait for them to sign with each other (they will each send their 73s / 72s and send a DIT DIT at the very end). Then call that station.
AA4XX AA4XX DE N4PBQ N4PBQ N4PBQ PSE QRS KNIf you've been listening to regular QSOs you'll recognize the form above. The repetition of the other station's call is to get their attention. You repeat yours for their benefit. The PSE QRS is asking them to slow down and the prosign KN means you're asking only them to respond. Have a prepared QSO text ready in terms of what to send. The SKCC beginners corner has a good sample QSOs.
Here is a sample QSO from when I was just venturing onto the air.
What is going on in the radioAs far using Morse Code in radio communication is concerned; a transmitter modulates a 100Hz to 150Hz wide signal called a Continuous Wave or CW at a particular frequency. The time the signal is transmitted corresponds to the length of time the trasnmitter key is depressed. When listening on a receiver you hear a tone whose pitch is determined by your offset from the frequency of the transmission. If you are listening exactly on the same frequency you will hear nothing because there will be zero Hz offset. So most modern receivers offset the receiver frequency above or below the signal and offset their own transmit frequency by the chosen offset. So if the offset is 750Hz you will hear a 750Hz tone if you are exactly on frequency with the other station. Confusing? Good, you're well on you way.
I've jotted down my thoughts on the ins and outs (mostly outs) of learning Morse Code as part of my QRP Ham Radio adventure. I think it is relevant enough to visitors to the Ham Radio QRP website to make it a static page available from the main menu:
DX for new CW operators
How to copy those high speed ops?
|EA8TL's Hexbeam in the Canary Islands|
Anyway I was happy to get the response. I know (or surmise) that my 80m Windom has some fairly pronounced gain nodes in different directions on the higher bands but I didn't know which directions they pointed. I guess one of the nodes points toward Africa (yaaay!)
|Path from N4PBQ to EA8TL in the Canary Islands|
Do DX operators just not want to bother with newbies such as myself? I wonder. I'd appreciate suggestions in the comments section.That's all for now
So lower your power and raise your expectations