Hi: Polite check-in if there are suggestions for next steps.? thanks, kiwin
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Re: Odd WF distortion leads to no decode...
Dave, All,
Bizarre reason but I may have found my issue. The problem was only
occurring with my IC-7300 and apparently only regularly apparent
when I was running 2 (or 3) instances of fldigi; the first
instance was running THOR22.
I tried numerous ways to discover a cause (many have been
described in this thread) and up until just after I got back from
Xenia, I thought I succeeded seeveral times only to be
disappointed after letting the 2 instance configuration run
longer.
Since my last report:
1. Set the sample rate (Soundcard,
Settings, Sample Rate, set to 22050 (value picked by SWAG) because
it is half the Native rate. This by itself, did not work but I
left it that way (by accident) to do the next step:
2. Ran the FSQ instance first, allowing that
instance to start flrig, then start the THOR22
instance that uses the same instance of flrig - this is
reverse of what I was doing when the problem was there and it
seems to be stable.
To rule out #1, I have reverted to Native sample rate and made
sure that the Windows USB Audio CODEC for both the TX and RX of
the IC-7300 was also set to 44100 (CD rate not DVD, DVD
sample rate is 48000). It seems to have stayed stable.
I will leave things running for a few more days to verify my
revised settings work..
Comment: I am not at all sure why this was happening to me when I
started the THOR22 instance first... and not when I start with
FSQ. I have been working with the AB8FJ FSQ 10.1415 MHz
experimental group where FSQ (at +1500 Hz) is being used to
"auto-assemble" a net group rather than using a net call up.
THOR22 (at +2000 Hz) is currently being used to move data - with flamp.
We also have a third chat channel using JS8Call at +1000 Hz. We
will likely move to THOR25 at +2000 Hz when the mode is
incorporated in a regular non-beta release of fldigi.
73
Jack Spitznagel
KD4IZ FM19oo
Parkton, MD
On 2/3/2025 8:18 PM, Jack Spitznagel
(KD4IZ) wrote:
toggle quoted message
Show quoted text
Will do! Thanks Dave.
Jack Spitznagel
KD4IZ FM19oo
Parkton, MD
On 2/3/2025 7:49 PM, Dave via
groups.io wrote:
The next time it happens please start recording the audio
on the bad and good instance.? Two minutes of audio should
be fine.? Send the audio files to me.
Thanks.
Dave
On Mon, Feb 3, 2025 at
5:43?PM Jack Spitznagel (KD4IZ) via
<kd4iz= [email protected]>
wrote:
Hi Dave,
Thanks for responding on this issue.
I am running 3 instances of fldigi but have seen it with
2 or one in the past. I can't say that other audio apps
were not running before.
I was not running a web browser or other audio stream
app when I took those screen shots.?
Happened again last evening, this time all 3 instances
showed the same effect. Re started the instances today
and all has been fine.
Just now went back to make sure the webcam and
conferencing apps and such were all unloaded. There
should not be anything accessing the audio subsystem
other than fldigi.
In response to the suggestion by James, WA9VEZ - no it
was definitely not ionospheric multipath. All fldigi
instances revert to clear trace immediately on a restart
of each.
As a former electronics guy (ETN/crypto) Coastie, I had
to deal with multipath and selective fade on fleet
broadcast and ship to shore HF circuits all the time. I
am familiar with what happens (including the doppler
effect on timing) and love having the specrum scope
features on the new generations of SDR based rigs. All
amateurs should learn to use them properly and interpret
thee pattern. IMO there would be much less QRM-ing going
on as a result.
Thanks again and 73!
Jack Spitznagel
KD4IZ FM19oo
Parkton, MD
On 2/3/2025 6:56 AM, Dave via wrote:
I have only seen that once on Windows 11 Jack,
but not when I was running multiple instances.? It
occurred when the web browser was on line with media
interface operating.? How many instances of fldigi
and what other applications that might be using the
audio stream?
David
On Fri, Jan 31, 2025
at 7:35?PM Jack Spitznagel (KD4IZ) via <kd4iz= [email protected]>
wrote:
Dave W1HKJ, All,
Running multiple instances of fldigi version
4.2.06.20 on Win 11 very successfully, however
when an instance is run for a long period of
time I infrequently see some distortion creep in
to the WF on one (sometimes 2) instances. When
this happens, decode becomes degraded or stops
only on the instance where I see the pattern
like trace below:
From a concurrent iteration, that same signal
looks like this:
Obviously it is not the rig or the OS audio
system. It has happened for several versions
back. It happens with fldigi using many
different modems. Frustrating, because I have
never been at the operating position when it
does happen. It is always resolved by exiting
the iterations that show the problem and
restarting them. Everything seems to run fine
for quite some time afterward.
1. Has anyone else seen this?
2. Any clue what might be happening?
Thanks and 73,
--
Jack Spitznagel
KD4IZ FM19oo
Parkton, MD
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Re: fldigi training net pdf slides
Thank you for the offer but I would rather not record these training nets
Folks are often intimidated by recording and won¡¯t ask their questions for fear of looking foolish
?
but tu
barry k3eui
?
|
Re: frequencies2.txt won't save 8PSK modes
I just confirmed that it is changing when fldigi is reopened? ? very strange
Dave Garber VE3WEJ / VE3IE
Since the data is saved correctly, must be a parsing issue.
Robert
|
Re: frequencies2.txt won't save 8PSK modes
Since the data is saved correctly, must be a parsing issue.
Robert
|
Re: frequencies2.txt won't save 8PSK modes
|
Re: frequencies2.txt won't save 8PSK modes
After saving the freq with mode 8PSK1000F, closing fldigi, and then reopening fldigi.....does it still show 8PSK1000F?
|
Re: fldigi training net pdf slides
Howdy.? I wanted to attend your first session but was travelling and wasn't able to take part.
I was just wondering if you recorded the session and, if so, would that video be available at some point?
Also, I have various platforms available if you would be at all interested in streaming the training sessions either on Discord or YouTube.. let me know. I should be able to help facilitate that.
I would LIKE to say that I can livestream on both at the same time.. and have in the past.. but that much bandwidth makes my old computers sweat a bit  ?
73
?
? ? ? ? ? WC/KN2Z
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Re: frequencies2.txt won't save 8PSK modes
I just tried it, and hitting the?+ symbol saved correctly as 8psk1000f
what mode is showing at the bottom left when you save it.? ?could you have more than one saved mode on that frequency?? ? Dave Garber VE3WEJ / VE3IE
On Wed, May 21, 2025 at 5:25?PM Randy Buxton, W4IFI via <randybuxton= [email protected]> wrote: I have these two modes in my freq list:
?
?
I save the freq list (control+enter on the wastebasket icon) and my frequencies2.txt file now looks like this:
?
?
I save the configuration (not sure if that's necessary) and then reopen Fldigi to see this:
?
?
8PSK1000F has changed to Cont-8/125.? Why is this and how do I make it not do that?
?
?
Thanks.
?
-Randy, W4IFI
?
?
|
frequencies2.txt won't save 8PSK modes
I have these two modes in my freq list:
?
?
I save the freq list (control+enter on the wastebasket icon) and my frequencies2.txt file now looks like this:
?
?
I save the configuration (not sure if that's necessary) and then reopen Fldigi to see this:
?
?
8PSK1000F has changed to Cont-8/125.? Why is this and how do I make it not do that?
?
?
Thanks.
?
-Randy, W4IFI
?
?
|
fldigi training net pdf slides
This slide deck on FLDIGI? is an evolving
show.? latest edition May 21 2025
I also have this as a Microsoft Powerpoint (ask
me)
If you spot any errors (or omissions) please
let me know
Feel free to share with local clubs/ARES/RACES
organizations.
We are starting an? "Fldigi
Training Net" on the 1st and 3rd
Saturday of each month:? 9 AM Eastern time
Zoom to start:? (write to me for link)
then practice using Fldigi on 3583 kHz 7068 kHz
or a 20m frequency for those outside the mid-atlantic region.
we also have a local 2m FM analog repeater
(147.270 PL 77) for one hour for those near Philly
73
de k3eui? barry
kennett square
PA
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Re: Fldigi Audio Error "Port Audio Device not available" After Recent Windows 10 Update
Three years later and I come upon this thread for the same reasons. My QRP Labs QMX wasn't reading Digi data.
?
It worked!
|
Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Well, it is now 0230 in Germany¡.. so you¡¯ll get this when you get up.? And at 1600 your time my wife will call her mother.
I thought your deductive work was amazing.? I am too old and lazy to want to spend that much time on it.? I just want stuff to work!
Yes ¨C I do believe I am blessed.? I was blessed to be capable of serving my nation, something I think every person should be required to do.? And I was fortunate to be sent to several locations overseas for extended periods of time.? People are a product of their environment, and often that is a small environment for some.? Seeing, learning and living in other cultures and customs was a very enlightening experience indeed.? Military service and overseas travel changed me a great deal.? I cringe when I hear the mating call of the Ugly American ¨C ¡°That ain¡¯t how we do it in the states!¡±.?
If we are to continue this, I think we should take it direct.? Mike-20205@....
BTW ¨C West Texas does have mountains.? Just 10km (6-miles) from my home is North Franklin Mountain at 2,192m uNN (7,192-ft ASL).? The highest peak in West Texas is Guadalupe Peak at 2,667m uNN (8,751-ft ASL).
I will look for any reply direct tomorrow.
? Vy73 ?¨C ?Mike ?¨C ?KD5KC ¨C WRFF851 ¨C ?El Paso ¨C Texas ?¨C ?DM61rt. ? SOTA W5T-Texas Association Manager. ? The canyons are calling, colorful and deep. ?But I have promises to keep. And miles to go still in my Jeep...? ?And miles to go still in my Jeep... ? 
? ADVENTURE: ?The respectful pursuit of trouble.? ? An EXIT is really an ENTRANCE to someplace new. ? It isn¡¯t an ADVENTURE until something goes wrong! ? ? ? ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of SWL Tobias via groups.io
Sent: Friday, May 16, 2025 15:03 PM
To: [email protected]
Subject: Re: [winfldigi] Help identifying unknown digital mode on 20m band #fldigi #mode? Hello Mike,
Thanks a lot for your kind and interesting reply!
My apologies, it took me a while to get back to e-mail tonight, and I'm just reading your e-mail right now (well after 'twennytwohundred local', so to speak).
You're probably much more familiar with the specific region in Germany you once served in than I am, having spent most of my life central and South Bavaria, with a few exceptions. And you're certainly blessed being a person who has had (and taken) the opportunity to work and travel abroad, which I believe is a great way to open one's mind and sometimes even make friends with local people there! Something I'd always recommend to anyone asking and in a position to make it happen. I guess you've been to more countries in Europe than I have, or at least a few different ones, I should say. SP is none of mine yet, certainly worth a trip, and with quite a bit of Ham activity, too.
A look into my FT8 log revealed nothing from DL88, and I can only guess how rare it must be on 6 m then. I'm not equipped for this fascinating band today, but I still vividly remember analog TV DX from all over Europe (at least from the countries with compatible TV systems) 'in the old days'. It's just great that Hams were able to 'conquer' 6 m when the channels down there were finally abandoned in the wake of the switch to Digital TV. Just opened your map image, I see now, for sure an interesting challenge, good luck with this operation then...
I agree, the low mountains of Northern Bavaria are a nice place with pleasant landscapes and scenery, not as exciting as what Texas has to offer, but a good place to live for sure.
Haha, 'erratic-spree', not a bad synonym for sporadic-E. :-)
I think, in fact, we still don't really understand where it starts building up and how it spreads out over such huge territories...? About 40 years ago, a SW radio hobby friend had told me about a theory that it appears to be favored in areas of greater pressure gradients, in other words, you would not experience a lot of Es close to the center of a pressure system, but as a L moves into an area of H pressure (or vice-versa), it may be more likely to happen. But I never heard about this again, although I'm inclined to think that there may be some such mechanism linked to our troposphere. It would at least be in phase with its being 'erratic', yes, that's your wife's proper expression for it! 'Sporadic' is in fact not really the best term, because it refers to the Sporades, the 'scattered' Greek islands, but Es certainly is not limited to any sea surfaces, but happens just as well over land, as we all know.
Wow, wonderful images, that's really special! Must be great fun taking the JEEP and the trailer out into such a beautiful scenery! Well, you and your wife sure deserve it, and I bet you're doing the exact right thing with your precious time. I've been to a desert (near Dubai) only once during a short stop-over on a business trip, quite an experience, even while only 'passing by'.
Thank you very much, I appreciate your kind words and would certainly like to visit you over in West Texas (having been to to the States several times before but sadly newer even close to the very attractive SW 'corner'), but I don't think it's likely going to happen, for various reasons. Life sometimes is more complicated than it should, and not all things can be 'engineered' at will.
So, Mike, let's keep in touch on radio related topics at least, and while I'm not even a ham, I do enjoy the radio hobby, and these days, with so many other SW services having closed, much of it is Ham Radio related now. And with my modest contributions, as in this group, I do try to support the Ham community just a little.
All the best from Franken,
73s Tobias
.-.-.
|
Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Hello Mike,
Thanks a lot for your kind and interesting reply!
My apologies, it took me a while to get back to e-mail tonight, and I'm just reading your e-mail right now (well after 'twennytwohundred local', so to speak).
You're probably much more familiar with the specific region in Germany you once served in than I am, having spent most of my life central and South Bavaria, with a few exceptions. And you're certainly blessed being a person who has had (and taken) the opportunity to work and travel abroad, which I believe is a great way to open one's mind and sometimes even make friends with local people there! Something I'd always recommend to anyone asking and in a position to make it happen. I guess you've been to more countries in Europe than I have, or at least a few different ones, I should say. SP is none of mine yet, certainly worth a trip, and with quite a bit of Ham activity, too.
A look into my FT8 log revealed nothing from DL88, and I can only guess how rare it must be on 6 m then. I'm not equipped for this fascinating band today, but I still vividly remember analog TV DX from all over Europe (at least from the countries with compatible TV systems) 'in the old days'. It's just great that Hams were able to 'conquer' 6 m when the channels down there were finally abandoned in the wake of the switch to Digital TV. Just opened your map image, I see now, for sure an interesting challenge, good luck with this operation then...
I agree, the low mountains of Northern Bavaria are a nice place with pleasant landscapes and scenery, not as exciting as what Texas has to offer, but a good place to live for sure.
Haha, 'erratic-spree', not a bad synonym for sporadic-E. :-)
I think, in fact, we still don't really understand where it starts building up and how it spreads out over such huge territories...? About 40 years ago, a SW radio hobby friend had told me about a theory that it appears to be favored in areas of greater pressure gradients, in other words, you would not experience a lot of Es close to the center of a pressure system, but as a L moves into an area of H pressure (or vice-versa), it may be more likely to happen. But I never heard about this again, although I'm inclined to think that there may be some such mechanism linked to our troposphere. It would at least be in phase with its being 'erratic', yes, that's your wife's proper expression for it! 'Sporadic' is in fact not really the best term, because it refers to the Sporades, the 'scattered' Greek islands, but Es certainly is not limited to any sea surfaces, but happens just as well over land, as we all know.
Wow, wonderful images, that's really special! Must be great fun taking the JEEP and the trailer out into such a beautiful scenery! Well, you and your wife sure deserve it, and I bet you're doing the exact right thing with your precious time. I've been to a desert (near Dubai) only once during a short stop-over on a business trip, quite an experience, even while only 'passing by'.
Thank you very much, I appreciate your kind words and would certainly like to visit you over in West Texas (having been to to the States several times before but sadly newer even close to the very attractive SW 'corner'), but I don't think it's likely going to happen, for various reasons. Life sometimes is more complicated than it should, and not all things can be 'engineered' at will.
So, Mike, let's keep in touch on radio related topics at least, and while I'm not even a ham, I do enjoy the radio hobby, and these days, with so many other SW services having closed, much of it is Ham Radio related now. And with my modest contributions, as in this group, I do try to support the Ham community just a little.
All the best from Franken,
73s Tobias
.-.-.
|
Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Hello Rich,
I hope we don't upset others with this continued conversation. If so, please bear with us and simply delete this e-mail.
Yes, it was 'legerdemain', et oui, je comprends 'l¨¦ger' = light(weight, also figurative) et 'demain' = tomorrow, but I could not make any sense of these combined into anything useful ;-)
Now the word 'WRT' popped up in your reply, yet another abbreviation unknown to an ignorant foreigner...
My local Wiki copy produced this, but I guess that's pretty much off the point, despite our radio topic: 'WRT' ('W'ireless 'R'eceiver / 'T'ransmitter).
Of course I do understand what you mean to say. Your term 'simplicate' is spot-on! It's a real pity that there's a continued tendency to keep things superficial, while, in fact, when properly explained, it may be quite fascinating to really get a grasp of what's going on 'behind the scenes', e.g. in common electronic devices or software.
Now get this little anecdote: Not belonging to the PHD 'league' myself, as a young engineer, back in the early 1990s, I had a regular analog quartz watch which I had happened to precisely set acc. to some SW Time Signal station one morning (as I did every other day or so). A PHD also working in my department, a young and very sympathetic guy I knew quite well, had just bought one of these (back then) brand-new radio controlled clocks, with an analog display, and I profoundly admired it at first glance. Without any ulterior motive, I looked at my wrist watch - and looked at the 'atomic' time displayed on the desk - and back again. Then I dared saying to him: Thomas, your clock is 1 second off, in fact, ahead of the actual time. He grinned at me, sure that I must obviously have been mistaken, saying 'that's not possible, Tobias, it's set automatically by the radio signal of DCF77, our precise official time signal, which might be off by a second in about a million years, but certainly not now'. Quite aware of DCF77, yet being quite sure of my case and sensing a fun challenge in our different assessments, I insisted. 'I know, but your clock is off by a second anyway!', so he replied: 'OK, I'll show you how it works...'. He took out the battery, put it back in and the hands started to rotate quickly, preparing the auto-calibration sequence. Rattling clock hands continued their rotation, until the hour and minute hands finally settled at 12:00, the perfectly parallel intended position (for the next auto-setting step), but - the second hand only stopped after reaching second '01'. It was, in fact, one full second off! We looked at each other and began to laugh. We now understood that both of us had been right, in a way. The actual issue had been caused in the final assembly of the second hand, so Thomas quickly pulled it off and placed it back at the correct position. We both had our lessons learned, and with a good laugh, continued our business day, assured that our timepieces now were perfectly in phase, literally to the split second...
Jumping to conclusions may be affected by our own level of experience and actual knowledge of the case, but not necessarily right, regardless of how convinced of our opinion we may be. Some DigiModes may appear easy to identify, but there are so many different ones today, some looking virtually identical in the waterfall (e.g. some Olivia and Contestia modes, or various modes with and without an FEC option), that I would rather not attempt to predict which one it is until a positive ID and decoding result is actually achieved.
Another quick one, somewhat 'radio related': after about 20 years of reliable service, my good old SONY ICF-2001D radio tuning knob started getting tight and finally the binding almost prevented manual tuning. Gently pulling it out within the small axial clearance helped somewhat, thus I was convinced that internally, the axial bearing / limitation must have been worn out to a point that any rotary movements had become mechanically challenging because some inner part, due to the shifted shaft position, must have started to cause excessive friction. So I adopted a manner of using it as little as possible and typed in frequencies most of the time instead. Months later, in a local store, I saw a little bottle of clear acid-free oil and, as things appeared to slowly get even worse over time, I dared pulling off the plastic knob and put a tiny droplet of oil in the RADIAL bearing clearance (I could not even get to the assumed worn axial part). Guess what: ever since, the knob does a perfect job again, just like it was when I first bought the radio, back in 1990. I was completely off with my stubborn assessment of an axial issue, and a drop of oil in the ACTUAL 'problem area' would have prevented lots of trouble and concerns right away. I had not even considered that my only idea, that it was an internal bearing issue, was utterly wrong...
That should give you an idea of how I see things by now, in a way ;-)
Thanks and 73s
Tobias
.-.-.
|
Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Hello Chris,
Thanks for the kind reply :-)
Well, believe me, I do have my share of DUNIDs, too, which I could not resolve so far (DUNID is my own term for 'Digital UNID').
I attach one recent European example, heard 5 times in a row (QRG and start date/UTC of the recordings are given in the file name). RX was in USB, as usual.
To me, it looks as if there was a header of some kind, lasting about 1.33 s, followed by a short gap of just below 0.6 s, and the presumed actual 'message', barely 5 s long.
In the analysis, the main message portion appears to consist of an 10-tone MFSK signal, about 47 Hz (maybe rather 46.8 Hz) apart, and using a constant 0.199 s tone spacing, so maybe it's rather 5 tones per second. I don't know whether this might be a VARA mode, since, unlike FLdigi, I cannot run it on my old Windows 7 (32 bit) OS.
Since it's in the DigiMode portion of the 80 m Ham Band, I assume it's a regular Ham DigiMode, but I fail to make any sense of it.
If any of you has a clue, please let me know.
Thanks a lot and best regards
Tobias
.-.-.
P.S.: My thanks also to Chuck K4RGN for your reply (you're in my FT8 log, too, as 'K4RGN FM05' ;-). I would hope, though, that operators using LSB for FT8 would notice it soon enough because they should not receive any legible messages, nor be heard by anyone (unless both have messed things up regarding their signal 'polarity').
.-.-.
Attachment (including 5 flac audio snippets and a spectrogram for the 1st example): DUNID_3594u_2025-05-12.zip
|
Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Good afternoon in Germany Tobias!? It is nearly 1800 by you, but only near 1000 here in West Texas.
Right now I am listening on 6m-FT8.? There are two hams who are trying to activate GRID DL88.? This is a semi-rare grid.? DL88 is 21,730 km? (8,390 mi?) but only 31.25km? (12.07 mi?) is in the USA.? That is 99.85% of the grid in Mexico and 0.15% in the USA.?? All the Mexican area is mostly inactive for radio.? The USA area is in a National Park, POTA US-0006.? They are camped right on the border and the Rio Grande River.? I have camped there before as well, but did not activate on 6m.
Just for information Tobias, I was a soldier on the Meiningen Gap for over 6 years during the Cold War Era before the German reunification.? I married a German, now she is N5NHC.? One winter it was -40¡ã C there.?
Since retiring from the military I have been DL/KD5KC many times, but also F/, LX/, HB9/, HB0/, OE/, OK/, ON/, OZ/, PA/ and next visit I hope SP/.
My wife Monika (Moni)'s family when we married was in JO50CB54 in Schweinfurt.? Now they live in JO50CG87 in Strahlungen, in the low mountains of Northern Bavaria.? Her sister is DL1NLG, brother-in-law is DG7NFV, and oldest nephew is DJ5KC.? Her father has died but her mother is still living.? When we visit Moni spends a month in her mother's kitchen.? I and DJ5KC (and sometimes DG7NFV) go out to do SOTA and POTA as often as possible.? The low mountains of Northern Bavaria have many good SOTA summits and POTA parks, and I am very active there whenever we visit.
Sporadic-E skip........?? A funny story.? When we Married Moni's English was OK, my German was only fair to poor.? They we received a duty assignment to Alabama.? One Saturday there was a very good sporadic-E opening on the 6m (50.0 to 54.0 MHz) band.? I was talking to many stations all over the continent.? Moni came into the room and asked me if I was having an erratic-spree.? I thought about that for a moment, then told her that yes I was!? Any propagation on the 6m band was erratic - but when it was working well it was a spree!?
SPREE:? a spell or sustained period of?unrestrained?activity of a particular kind.
We were later assigned to West Texas in 1984, and that was our assignment for the next 11 years.? I was sent in and out to several assignments while Moni stayed in Texas and raised the family.? Often she was alone.? But she loves West Texas.? She bought our JEEP as a birthday present for me.? She bought our trailer as a retirement gift.? Now we travel when we can.? If you ever come to West Texas we need to take you out exploring the desert.? And eat Tacos in Mexico!
  ?
Ich wunch dich alles gute.
Vy73 ?¨C ?Mike ?¨C ?KD5KC ¨C WRFF851 ¨C ?El Paso ¨C Texas ?¨C ?DM61rt. ? SOTA W5T-Texas Association Manager. ? The canyons are calling, colorful and deep. ?But I have promises to keep. And miles to go still in my Jeep...? ?And miles to go still in my Jeep... ? 
? ADVENTURE: ?The respectful pursuit of trouble.? ? An EXIT is really an ENTRANCE to someplace new. ? It isn¡¯t an ADVENTURE until something goes wrong! ? ?
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of SWL Tobias via groups.io
Sent: Friday, May 16, 2025 8:39 AM
To: [email protected]
Subject: Re: [winfldigi] Help identifying unknown digital mode on 20m band #fldigi #mode ? ...Thanks for the praise, Mike, and you certainly don't need to! ? Your equipment works just fine: I heard you before in FT8 here in Bavaria, at about 9100 km for your location. ? ? Here's what my own FT8 (all time) log shows for the few of you mentioned in this post (Rich NE1EE isn't in it, as he may be using FLdigi instead, which, if so, I fully understand ;-): ? AD9GE EM69 ? KD5KC DM61 ? VA3CJO FN25 ? ? My antenna is just a small home-brew in-house MagLoop (50 cm outer diameter) fed into a portable SONY ICF-2001D (equivalent US model: 'ICF-2010') portable radio. ? ? Contrary to the past winter season when the band was packed with loud signals, this afternoon, my usual background log on 10 m only yielded quite few and mostly weak signals, see attached map. The dot size is proportional to the reported SNR. A very poor result in deed, not a single signal from North America, just a bit of sporadic-E to Southern Europe and some TEP for the Southern Hemisphere, really nothing to write home about... ? ? Have a great day - and weekend! ? ? 73s Tobias -.-. ? ? ? ?
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Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
GM, Tobias,
Yes...if you are thinking "legerdemain", it derives directly from 2 common French words...that has been brought straight into English ;-)
I wrote off (politely, I hope) to Aaron Hamm AD9GE. The whole analysis interested me, but more than that, it speaks to why hams need a full understanding of how radio transmissions are created, and possible side effects.
Thanks for taking the time to write that up. WRT "torrent", I find that generally most "advanced" societies have drifted toward too much brevity in communicating technical detail. In fact, a decade or so ago, I coined the term "simplicate", meaning something whose explanation has been simplified to the point that it is no longer accurate or understandable (simplify something complicated). I did this after spending far too much time with a handful of Physics PhDs who were sure they understood some very complicated stuff, because they had spent literally years explaining to one another and in print a too-simple version, a version that was in fact, not complete or correct.
A fellow ham said that when he wants a brief reply to a question, he'll ask any ham, but when he needs the theory and detail, he comes to me, knowing that I will deliver perhaps more than is needed, but not less.
~R~
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On 2025-05-16 09:43:, SWL Tobias via groups.io wrote: I just learned a new English word and was even rewarded by someone actually reading through my entire 'torrent of words' ;-)
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Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
That's fabulous analysis, Tobias.
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A more common problem is an FT8 user whose radio is mistakenly set to LSB. This tends to trample the Olivia watering hole (e.g. 7071-7013 relative to 7074-7076). We see this all the time on Olivia nets. Fortunately, Olivia is often robust enough to decode anyway.
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73 Chuck K4RGN
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Re: Help identifying unknown digital mode on 20m band
#fldigi
#mode
Wow. Amazing work Tobias.
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I spent more time on SigIdentWiki, narrowing the signal down to an 8-tone. DominoEX 8, while the closest, still wasn't a perfect match and Fldigi wasn't decoding, for obvious reasons.
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I went digging in my "ALL.txt" file for WSJT-x and found this line which coincides with the time stamp on my capture:
250515_222345 ? ?14.074 Rx FT8 ? ? ?5 ?0.1 ?832 CQ AD9GE EM69
Other decodes before and after were even stronger, upward of +9dB.
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Mystery solved, with thanks - and thanks as well for walking us through your process!
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Jack Spitznagel (KD4IZ)
K3EUI Barry
Wayne Carpenter KN2Z @minicowman
Mike Olbrisch
Rich NE1EE
Chuck K4RGN