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I remember being surprised to learn that a CW signal has a bandwidth (albeit small), but when I thought it over, it made sense. Essentially, we are modulating the carrier with a low frequency square ...
I was recently reading this article from the ARRL web site,
Morse Code at 140 WPM (ARRL)
about Chuck Adams, K7QO, who claims to be able to handle this speed all by himself. Very interesting article....
What is the difference between Iambic Keyer mode A and mode B? Are there any other popular keyer modes? Why would one choose one mode over the other?
If only one Iambic keyer mode is to be ...
I'm working on learning Morse code, and I'm looking for a way to use my computer as a practice oscillator with a double paddle key.
I'm using a Linux PC, but a Raspberry Pi solution would be cool to. ...
The ending song of an anime television series called Le Eden de la Grisaia here has a light flashing. I suspect it may be Morse Code. By watching the video a little more slowly than usual (frame by ...
On the UK Band Plan there are frequencies stating “QRS (slow telegraphy) Centre of Activity”. For example, 14,055 kHz on 20m and 3,555 kHz on 80m.
What is considered slow? (<15 wpm?)
How close ...
I've seen that quite often in Morse code tables (for example here), under punctuation, a semicolon ";"character is listed.
However, the ITU-R M.1677-1 doesn't specify that character as a part of ...
I ended up with an old straight key that has a curious feature: below the main arm that you would tap on, there's an extra metal flange that can sort of loosely pinch an extra sliding lever underneath,...
I want to eventually use a CW paddle and built in keyer in my Yaesu FT-890. What are the merits of each style. Single or Dual Paddle. Does it make any difference if I start with say a dual paddle then ...
According to this question MCW (modulated continuous wave) is allowed on large portions of the VHF bands in the U.S.
Is using MCW suitable for passing small amounts of digital data between 2 PCs or ...
http://vocaroo.com/i/s0fsMOJ82A7k
Trying to decipher this morse code if someone can help me. It's 14 characters long and the first lot is Illuminatih I think.
I know that there are several commercial programs that will decode incoming CW using the computer's sound card, but this is not quite what I need.
The specific requirement that I have is to feed the ...
There are many anecdotes of hams learning Morse Code at e.g. 5wpm and then "hitting a wall" trying to gradually speed up to 15wpm.
David G. Finley, N1IRZ claims the reason is this:
Morse at 5 wpm ...
The Koch method of learning Morse code is based on the idea that you learn characters at full speed, but a reduced set of characters that is expanded over time, instead of learning the full set of ...
I'd like to get some recordings of typical receiver audio output of HF CW transmissions.
I'd like to both train my mental copying capabilities and look into improved automatic (software) CW ...
I'm completely new to amateur radio, so please forgive me if this is a silly question.
I'm looking at these devices: Assembled HAM RADIO 40M CW HF QRP Pixie Transmitter Receiver 7.023-7.026MHz DIY on ...
I want to build a system that can transmit data through 2-way radios as far as possible. I use the "line-in" as the input of the baseband signal in the transmitter and use the "audio out" as the ...
Bens Best Bent Wire
My uncle, who was a Merchant Marine in WWII used to tell me this. He was a ham, and said it would develop my fist musically.
I was a small child at the time, and through his ...
Is there an app that sends random morse code that I can copy to paper, then shows me what was sent for me to check my work? Basically an app that works like the MFJ-418 Code Tutor. All the apps I find ...
Where can I find the definition of the Q Codes for amateur radio?
So far I could only find
ITU-R M.1172
ANNEX 1
Miscellaneous abbreviations and signals to be used
for radiocommunications in ...
I have the MFJ-564B iambic paddle which I need to wire to the MFJ-552 CW interface. The paddle is stereo (dits/dahs) and the interface is mono (when connected to paddle, only gives DITS). How can I ...
I'm a new ham and have only used 2m/70cm so far. I have recently completed a QRP CW setup: a YouKits HB-1B transceiver and a simple wire dipole. I haven't made any contacts yet, and I'm wodering if ...
I currently have a Kenwood TM-V71A 2m/70cm transceiver that I would like to connect to my Macbook to transmit morse code, using the cocoaModem software. Aside from the cables needed to connect the ...
I have a little MFJ QRP CW 20m rig that I plan to turn into a portable kit for SOTA peaks. I have everything figured out except for the antenna. I am wanting to make a dipole. However, I was wondering,...
I am studying for my FCC General Class license, and question/answer G4A02 reads as follows:
Q: What is one advantage of selecting the opposite or "reverse" ...
What is the history on the term “lid” when referring to a telegrapher’s capability? How did it originate and what is the significance if any of each letter?
What kind of cable would be suitable for wiring an MFJ-564B Iambic CW Paddle to an Icom IC-718?
I have heard that you can just use a length of old electric guitar cord but I was not sure what to do.
I have a 20m CW transceiver with an option for a wide or a narrow filter. When the narrow filter is selected, a crystal ladder filter is used in the intermediate frequency filter, between two mixers. ...
I tried making a CQ on 20 m, 14.060 MHz (the QRP CQ frequency) and parallel to that I had a WebSDR on my computer just to keep an eye on the band. I saw someone responding on the WebSDR, which is ...
Back in the 1960s during my Novice days I operated on the 40-meter band only with 4 different quartz crystals that determined my transmitting frequency with my Eico 720 CW transmitter. I had heard ...
I received my license and built and tested my first CW transceiver. I've spent the last weeks learning Morse code. Now, time has come to make the first contact.
But what is a typical CW contact? When ...
I'm throwing together bits-and-pieces towards my rig on a less than shoestring budget. It is possible to apply a take-off from the key and use it to drive a piezo-buzzer. Of course, there won't be any ...
Morse Code is defined by most dictionaries in terms of sequences of short and long signals. What would be the most common or most descriptive terminology for un-timed written or printed code, where ...
I am using a crystal to transmit morse codes, and I am using Kenwood radio receiver to obtain the signal. It receives the signal with a lot of noise, though we can figure out the morse code sound. I ...
I regularly practice Morse with a friend on 2m NFM by holding our tone generators, which we also use for personal practice, close to the microphone. We send text by CW, read it back, and discuss how ...
I need some recordings of CW / Morse code for use in a project. Most of what I find is either nonsense (it just exists for the 'sound of CW', but doesn't contain a message) or is generated by a ...
Apologies, this may be off topic. Ham radio operators are the probably the only community that might have used Handicode. Back in 2002, a company "Microsystems Software" made a DOS program that ...
How important is it to maintain a consistent Morse Code WPM keying speed when transmitting CW? I occasionally hear operators slow way down when sending RST and location info, and then later ...
What are some characteristics, when sending CW, of a "bad fist"? How bad can it get, typically, and still manage to communicate the message text sent to a human operator on the receiving end?
Contra-...
What is the proper way to calculate or determine the amount of time between words (the key up of the last character of one word to the key down of the first character of the next word) when using ...
What kind of circuit can be constructed and/or could be used to convert audio containing Morse Code sounds (say from an old practice tape, or from computer generated audio) into key, switch or relay ...
I just got an old brass key at a hamfest, and it appears to be in pretty good mechanical condition, aside from some dirt and dust. Taking it apart, the key (apologies for not knowing the exact ...
When using coherent CW, how is the receiver frequency and/or Morse Code dot clock synchronized to the transmission precisely enough to allow for synchronous decoding?
When learning, teaching oneself, or training a class in Morse Code sending using a hand key, how can acceptable quality be scored (other than the letters being correct terms of dot-dash sequence)? ...
So I'm developing my own SDR software from scratch (I like to "own" the code). The channel between the RF-to-USB hardware and the software is 192kHz sample-rate IQ audio samples. The degrees of ...
What are "key clicks"? How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by "key clicks"? Is there a legal ...
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