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Re: fldigi CW decoding problems
I use PCW Fistcheck all the time to keep in practice twixt on air sessions. I find that it does really well at decoding what my rigs send. I use a straight key 90% of the time, which is why I like the PCWF feedback on my timing. The timing dialog is great for that. I agree that getting CW off the air is another matter, with signal shifts, fading, etc, but I have used PCFW with a local ham on HF, and it was pretty good. In fact, PCWF showed what fldigi could not...
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One of the new CW hams was using a keyer, and thinking that he was sending great code. His dits and dahs were great, actually...as you'd expect from a keyer. Problem was that he couldn't send a letter or a word that was generally understandable by ear, so PCWF had no chance. But I copied what PCWF recorded, and sent that to him. He got the message right away, and decided to shift from keyer to straight key until he had a better sense of timing. I think using fldigi is overkill for these simple tasks, but I understand wanting to use it if the goal is to actually send and receive CW using fldigi. I occasionally use Morse Expert. It is great at showing just how much the RX CW signal shifts around, and why it is so difficult to machine decode hand sent CW. 73 Rich NE1EE The Dusty Key On the banks of the Piscataqua On 2025-01-25 10:54:, Bob McGraw - K4TAX wrote:
RE: No decode on hand sent CW from the K4. Is the monitor audio getting to the computer? |
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Re: fldigi CW decoding problems
RE: No decode on hand sent CW from the K4. Is the monitor audio getting to the computer? I just checked my K3S feeding my computer as normal and FLDIGI does decode my keyer sent CW. It also decodes my hand sent CW with my straight key. Check your monitor level audio going to the computer and application.
73 Bob, K4TAX |
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Re: New web hosting site for www.w1hkj
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Hi Dave,
I had a quick look. The link to fldigi opens a directory with just the help text file in it. The one to flrig has all the files.
73 Phul G3ZZA
From: [email protected] <[email protected]> on behalf of Dave via groups.io <w1hkj25@...>
Sent: 25 January 2025 1:23 AM To: [email protected] <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]> Subject: [winfldigi] New web hosting site for www.w1hkj ?
I am in the process of moving the entire w1hkj web site to be hosted at QTH.com.? The new site is
Please visit the site and report any discrepancies, particularly misdirection of links.? fldigi, flrig, etal still need to be modified to reflect this move to the QTH host.
73, David
W1HKJ
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Re: New web hosting site for www.w1hkj
Thank you.? Fixed both issues. David On Sat, Jan 25, 2025 at 5:59?AM T? via <tsquare123=[email protected]> wrote:
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Re: New web hosting site for www.w1hkj
Hello David
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I found two "issues"
-nanoIO doc link points to https://www.w1hkj.org/files/nanoIO/nanoIO.doc , the file is missing. There is a pdf help file in the directory but the link points to a doc file (this was also missing at the .com website, not something new).
-The Fldigi online manual https://www.w1hkj.org/FldigiHelp/index.html is missing the contents menu on the left (it is OK at the .com website).
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73
Haris
SV1GRB |
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Re: New web hosting site for www.w1hkj
that should be On Fri, Jan 24, 2025 at 7:23?PM w1hkj <w1hkj25@...> wrote:
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New web hosting site for www.w1hkj
I am in the process of moving the entire w1hkj web site to be hosted at QTH.com.? The new site is Please visit the site and report any discrepancies, particularly misdirection of links.? fldigi, flrig, etal still need to be modified to reflect this move to the QTH host. 73, David W1HKJ |
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Re: fldigi CW decoding problems
¿ªÔÆÌåÓý
Thanks Bob,
Once upon a time I tried to get Fldigi to copy my hand sent morse. I eventually managed it. I've looked at the algorithm and indeed have coded into a keyer/decoder I built using an Arduino. The algorithm works fine with a pure digital on-off signal. However
trying to isolate the on-off signal from the audio pass-band was more problematic. The DSP requirements were beyond the capabilities of the Arduino.
Your comment on the effects of the filter are very relevant. When I use fldigi on-air as a back-up to head copy, it fails dramatically. Head copy requires a narrowish filter. Too narrow and the ringing even makes head copy difficult. Fldigi, as you said, needs
a wider filter.
73 Phil GM3ZZA
From: [email protected] <[email protected]> on behalf of Bob McGraw - K4TAX <rmcgraw@...>
Sent: 24 January 2025 7:13 PM To: [email protected] <[email protected]> Subject: Re: [winfldigi] fldigi CW decoding problems ?
A study of the on-line documentation for starters.?? Forget trying to decode hand sent elements.? Computer sent elements decode just fine.?? There is no anticipatory algorithm that tells FLDIGI what's coming next.?? Head copy is always
superior to computer copy.?? If you are expecting the computer to do the decoding for all CW signals, forget it, it won't happen.?? Good code equals good copy.? Poor sent code equal's poor copy.
Don't get the receiver bandwidth too narrow as filters can ring, thus contribute to poor copy.? I normally run 1.0 to 1.5 kHz receiver BW. I find FLDIGI to be one of the better CW decoding applications.? In fact I use it with N1MM as the CW engine.?? I have HRD, MixW4, CW Get, and a couple of other CW applications.?? Each has their merits.???? My Elecraft K3S does an excellent job decoding CW signals........if the parameters, threshold, etc. are correctly adjusted.? It takes patience and lots of trial and error, along with understanding of signal and band noise relationships.?? There is NO one setting that will make it always great. 73 Bob, K4TAX |
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Re: fldigi CW decoding problems
A study of the on-line documentation for starters. Forget trying to decode hand sent elements. Computer sent elements decode just fine. There is no anticipatory algorithm that tells FLDIGI what's coming next. Head copy is always superior to computer copy. If you are expecting the computer to do the decoding for all CW signals, forget it, it won't happen. Good code equals good copy. Poor sent code equal's poor copy.
Don't get the receiver bandwidth too narrow as filters can ring, thus contribute to poor copy. I normally run 1.0 to 1.5 kHz receiver BW. I find FLDIGI to be one of the better CW decoding applications. In fact I use it with N1MM as the CW engine. I have HRD, MixW4, CW Get, and a couple of other CW applications. Each has their merits. My Elecraft K3S does an excellent job decoding CW signals........if the parameters, threshold, etc. are correctly adjusted. It takes patience and lots of trial and error, along with understanding of signal and band noise relationships. There is NO one setting that will make it always great. 73 Bob, K4TAX |
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Re: Multiple instance question
¿ªÔÆÌåÓýRobert,Thanks for adding in your thoughts. I would not want to see a blanket "ignore" but rather a way to say in effect "instance fldigi_2, wait and queue the transmission for sending as the current transmission is cleared by CAT command from instance fldigi_1. There might be an important "ACK" or answer lost . 73 Jack Spitznagel
KD4IZ FM19oo Parkton, MD On 1/23/2025 2:58 PM, Robert, KK5VD via
groups.io wrote:
Dave, Seems to me the arbitrator would be FLRIG. FLRIG would need away to determine if there is more then one instance of FLDIGI running and at that point ignore any additional transmit requests if one is already active. Audio mixing hopefully is handled by all operation systems that FLDIGI supports. Might want to consider having a transmit/disable transmit counter that way if you receive 2 transmit requests you will wait for 2 end transmit before calling the transmit ended. Just a few thoughts that popped in my head after reading the issue/request. Robert |
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Re: FLDIGI Hanging (crashing or hangs up)
Hi Jack (KD4IZ)m
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I try after a longer time again. This one 4.2.06....
The crash or hangup still exist.
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If possible by the user, first Page he hangs up or crash.
If I am super lucky, I come to the Point of the Sound card, last hang up or crash.
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Not possible to enter, finish the setup.
Always, I can kill the Process.
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Kind regards
Christian (HB9TH jr. ) |
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Re: Multiple instance question
Hi Jack, Your request does make sense, and you are the first one to request this type of function.? I'll look at code changes (probably all in fldigi). David On Wed, Jan 22, 2025 at 12:30?PM Jack Spitznagel (KD4IZ) via <kd4iz=[email protected]> wrote:
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Rich NE1EE
Bob McGraw - K4TAX
Philip Rose
Dave
Haris SV1GRB
Jack Spitznagel (KD4IZ)
Christian Schaer