Impariamo il CW con l'ARRL. Sul sito Web della più grande Associazione mondiale di Radioamatori troviamo alcune parte dedicare all'apprendimento del codice morse (CW) utile anche a chi si diletta di solo ascolto.
Tralasciando la possibilità di partecipare a contest che precedano questo tipo di emissione il quali possono essere difficoltosi per un novice apprendere il CW è senza dubbio utile per l'ascolto delle stazioni utility che operano in telegrafia o per identificare i beacon.
Avevo già parlato della stazione militare francese FAV22 che organizza corsi di telegrafia in collaborazione con la REF in un precedente post http://laradioa360gradi.blogspot.it/2014/03/fav22-impariamo-il-morse.html ora vediamo il servizio on-line offerto dalla ARRL.
La pagina di riferimento è la seguente http://www.arrl.org/code-practice-files; nella pagina viene presentato il programma e si ha la possibilità di scaricare file MP3, magari per riascoltarsi con un telefonino di ultima generazione nei momenti di pausa, con relatico testo per confrontare la propria abilità nel ricevere con quanto ascoltato. I testi non sono i solito gruppi di cinque lettere o numeri ma veri e propri testi.
e' possibile approcciarsi all'ascolto con velocità diverse che variano da 5 WPM a 40 WPM. sul sito ritroviamo anche l'archivio dei file MP3 dal 2013.
W1AW Code Practice MP3 Files
Listed here are W1AW code practice transmissions for the dates and speeds
indicated. The files are in MP3 format, playable using Windows Media
Player, RealPlayer or your favorite MP3 player.
The files are updated every other week.
The first link is used for streaming audio -- click on the link to have the player play the code practice as it receives it. It may also be used to download the code-practice file to disk for later playback. (In Windows, right-click on the link to the file you want to save to get a menu of options.) Not all MP3 players will treat the link the same, and some players may not work on the link type.
The second link is the actual text of the code practice file. Please note that the text file may contain control characters. You will hear these characters as regular Morse code prosigns or abbreviations.
The files are updated every other week.
The first link is used for streaming audio -- click on the link to have the player play the code practice as it receives it. It may also be used to download the code-practice file to disk for later playback. (In Windows, right-click on the link to the file you want to save to get a menu of options.) Not all MP3 players will treat the link the same, and some players may not work on the link type.
The second link is the actual text of the code practice file. Please note that the text file may contain control characters. You will hear these characters as regular Morse code prosigns or abbreviations.
Files
Text Source for W1AW Web Code Practice Files for June 24 and 25, 2014:
Text for the 5 to 15 WPM runs comes from November 2013 QST, page 85.
Text for the 20 to 40 WPM runs comes from December 2013 QST, page 90.
The various archive files are available from the following links. Access to each other archive is also available from any of these various pages:
The 18 WPM is a "transition" file to help bridge the gap from 15 to
20 WPM. The file contains word and letter groups sent at 18 WPM
with an 18 WPM character speed.
This particular file is actually part of the W1AW CW bulletin from
previous weeks. This allows for a different transition file with
each update.
The 40 WPM file is composed of texts taken from the lower speed
files.
The various TEXT files contain the actual code practice text used in
each run. Please note the embedded "control characters" (used to
generate the CW prosigns) are included in the text.
Please note the tone frequency is 750 Hz.
Questions or comments about these files may be directed to:
Joe Carcia, NJ1Q - nj1q@arrl.org
http://www.arrl.org/code-practice-files
http://www.arrl.org/5-wpm-code-archive
'73 de IK1XPK, Claudio
Text for the 5 to 15 WPM runs comes from November 2013 QST, page 85.
Text for the 20 to 40 WPM runs comes from December 2013 QST, page 90.
The various archive files are available from the following links. Access to each other archive is also available from any of these various pages:
5 WPM files | 20 WPM files |
7.5 WPM files | 25 WPM files |
10 WPM Files | 30 WPM files |
13 WPM Files | 35 WPM files |
15 WPM Files | 40 WPM files |
18 WPM files |
The 18 WPM is a "transition" file to help bridge the gap from 15 to
20 WPM. The file contains word and letter groups sent at 18 WPM
with an 18 WPM character speed.
This particular file is actually part of the W1AW CW bulletin from
previous weeks. This allows for a different transition file with
each update.
The 40 WPM file is composed of texts taken from the lower speed
files.
The various TEXT files contain the actual code practice text used in
each run. Please note the embedded "control characters" (used to
generate the CW prosigns) are included in the text.
Please note the tone frequency is 750 Hz.
Questions or comments about these files may be directed to:
Joe Carcia, NJ1Q - nj1q@arrl.org
http://www.arrl.org/code-practice-files
http://www.arrl.org/5-wpm-code-archive
'73 de IK1XPK, Claudio
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