Re: Problem running Arduino on Linux under Kubuntu / Ubuntu
except that the file mentioned doesn't actually exist!
I solved the problem by downloading the zip file containing a conventional binary image.? Still have to set chown root and permissions though. ?? You can also just run the appimage with --no-sandbox.?? However that might be less secure!
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On Fri, May 23, 2025 at 06:16 AM, Albert Peter wrote:
I will remove the CW messenger, but if you would send a screen shot of the T41 port, I will include that.
Screenshot of the code?? The code is available on my GitHub in the file .? It's over 500 lines so I'm not sure if a screenshot is useful.? Perhaps a scroll box?
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Or do you mean a photo of the radio in that mode.? There's not much to that photo (see below) but if you can handle a video, I can send a short clip demonstrating the memory keyer and keyboard entry (just a CQ with my call sign).
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Re: T41 Hilbert Filter Design
Thanks Terrance. I¡¯ll keep studying this. I have 66_9 and will use my PC with WSJT dave
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On May 23, 2025, at 5:50?AM, Terrance Robertson, KN6ZDE via groups.io <tmrob4@...> wrote:
? Hi Dave.? I assume you're interested in FT8 with WSJT on your PC. I know several folks have done data modes with their PC and T41 connected in various ways.? Some modes can be done without modifying the T41 software.? V66-9 does have a CAT control module but I am not familiar with it.? Others, including me, have added CAT control to their v11 software.
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I've done a few things with FT8 specifically.? I've added an FT8 decoder to my T41.? It's not readily ported to the main code base as it requires some work to free up the needed memory.? With my current software, the Teensy only has 12k of heap left in FT8 mode, though saving memory hasn't been a focus of mine for some time and I've added a bunch of stuff that could still be optimized somewhat.? Full FT8 solely within the T41 might be possible but would require a lot more work?
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I've also tried FT8 with WSJT with audio over USB from the T41 to PC.? I got it sort of working, but as discussed in this post, it really requires a patch to the Audio library to work correctly.? I haven't tried that yet, but I think others have. ?
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Re: T41 Hilbert Filter Design
I will have to have a look. I did revise some of the fitlter designs in the last version.
Al
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The design stuff would be a whole page on its own. I may add that over time. I would have to do it with a lot of context added so it makes sense.
Good idea.
al
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Thanks,
Terrance.
I will remove the CW messenger, but if you would send a screen shot of the T41 port, I will include that.
Regards,
Al
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Re: New T41 Site Available
Site is looking amazing.
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Thank you Jack and Al.
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Regards
Phil VK2KKZ
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Al
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You've put together a great site.? Thanks.? I especially like the performance pages.? Any design details that didn't make it into the book would also be helpful from a historical perspective.
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A note on the Gallery photos.? In the sixth row, first image, you've included a photo of my build of the CW Messenger, a project from your and Jack's Microcontroller project book.? No problem including the photo, but it's not T41 related.? In fact, I ported a version of that software into my T41 so my CW Mesenger now sits mostly idle.
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Re: T41 Hilbert Filter Design
Hi Dave.? I assume you're interested in FT8 with WSJT on your PC. I know several folks have done data modes with their PC and T41 connected in various ways.? Some modes can be done without modifying the T41 software.? V66-9 does have a CAT control module but I am not familiar with it.? Others, including me, have added CAT control to their v11 software.
?
I've done a few things with FT8 specifically.? I've added an FT8 decoder to my T41.? It's not readily ported to the main code base as it requires some work to free up the needed memory.? With my current software, the Teensy only has 12k of heap left in FT8 mode, though saving memory hasn't been a focus of mine for some time and I've added a bunch of stuff that could still be optimized somewhat.? Full FT8 solely within the T41 might be possible but would require a lot more work?
?
I've also tried FT8 with WSJT with audio over USB from the T41 to PC.? I got it sort of working, but as discussed in this post, it really requires a patch to the Audio library to work correctly.? I haven't tried that yet, but I think others have. ?
?
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The T41 Information site is live at and we are getting a lot of traffic. So far, just since yesterday at noon, we have gotten over 400 visits and more than 1200 page views.
I just added a new photo gallery of images gleaned from this site and other places. If you want to have your rig featured on the User page, send me a photo and short paragraph describing your experience.
Send to
Thanks,
Al
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Re: Help: Audio is pumping on bands 17 and 15.
Thank you, Oliver, the audio pump problem on shutdown has been there for a very long time on multiple software versions.? Your fix also corrected the problem for me. Rick, KN4AIE ?
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From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Wednesday, May 21, 2025 4:51 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Help: Audio is pumping on bands 17 and 15.? I've pushed a bug fix to the Ver66-9 github repo to get rid of the audio artifact on shutdown. Does this fix your problem when you enable MAIN_BOARD_ATTINY_SHUTDOWN? On Wednesday, May 21st, 2025 at 6:28 AM, bty84827531 via groups.io <roger.trett@...> wrote:
My rig does have the ATTiny in place and it is programmed.
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Re: Problem running Arduino on Linux under Kubuntu / Ubuntu
That damn sandbox helper again!
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
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On May 22, 2025, at 1:00?PM, ken WA2MZE <wa2mze@...> wrote:
? Somethings changed with a recent Ubuntu update.? I tried launching the Arduino AppImage and got this:
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./arduino-ide_2.3.6_Linux_64bit.AppImage
[13415:0522/155036.803945:FATAL:setuid_sandbox_host.cc(158)] The SUID sandbox helper binary was found, bu
t is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure
that /tmp/.mount_arduinIn8mwB/chrome-sandbox is owned by root and has mode 4755.
Trace/breakpoint trap (core dumped)
Anyone else seen this and have a fix?
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Re: Problem running Arduino on Linux under Kubuntu / Ubuntu
On 2025-05-22 13:00, ken WA2MZE wrote: Somethings changed with a recent Ubuntu update. I tried launching the
Arduino AppImage and got this:
./arduino-ide_2.3.6_Linux_64bit.AppImage
[13415:0522/155036.803945:FATAL:setuid_sandbox_host.cc(158)] The SUID
sandbox helper binary was found, bu
t is not configured correctly. Rather than run without sandboxing I'm
aborting now. You need to make sure
that /tmp/.mount_arduinIn8mwB/chrome-sandbox is owned by root and has
mode 4755.
Trace/breakpoint trap (core dumped)
Anyone else seen this and have a fix? *** My first guess would be: sudo chown root /tmp/.mount_arduinIn8mwB/chrome-sandbox sudo chmod 4755 /tmp/.mount_arduinoIn8mwB/chrome-sandbox ..buyt first I would say sudo ls -l /tmpo/.mount_arduinIn8mwB/chrome-sandbox ...to see what's going on. - Jerry, KF6VB
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Problem running Arduino on Linux under Kubuntu / Ubuntu
Somethings changed with a recent Ubuntu update.? I tried launching the Arduino AppImage and got this:
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./arduino-ide_2.3.6_Linux_64bit.AppImage
[13415:0522/155036.803945:FATAL:setuid_sandbox_host.cc(158)] The SUID sandbox helper binary was found, bu
t is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure
that /tmp/.mount_arduinIn8mwB/chrome-sandbox is owned by root and has mode 4755.
Trace/breakpoint trap (core dumped)
Anyone else seen this and have a fix?
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Re: T41 Hilbert Filter Design
Thanks Terrance. I¡¯m interested in using FT8.? dave, n3ds
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On May 22, 2025, at 8:34?AM, Terrance Robertson, KN6ZDE via groups.io <tmrob4@...> wrote:
? My software () is for v11.? I did send Al a little blurb about my build.? I'm currently building the v12 and slowly modifying my software for the hardware changes.? It will be a while before it's ready to put up on GitHub, but if folks are interested, I could put up the work in progress.? I'm currently working on refining the calibration routines.
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Yes, the book corresponds to the V66.9 firmware, so you should update the firmware on your radio. You can find the firmware and the instructions here:
On Thursday, May 22nd, 2025 at 8:38 AM, Duane B via groups.io <dbrantley@...> wrote:
Hi everyone.?
We have a radio club where I work.? Last year we purchased a T41 kit from AI6YM.? I understand it have v50.2 firmware on it.? When trying to follow the Receive IQ calibration, from the latest T41 book (updated for v12 boards), we noticed that the menu is missing some functions and the display is messed up.? Is the book written for v66.9 firmware?? ?Here is what the display looks like.? Thanks ,
Duane? - K5CA 
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Yes, the code is available on my for v11 though.? I'm slowly modifying it for the v12 hardware changes.? Note that this can't be dropped into the official v11 code.? I needed to find a lot of memory savings to get this to work.
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Re: T41 Hilbert Filter Design
My software () is for v11.? I did send Al a little blurb about my build.? I'm currently building the v12 and slowly modifying my software for the hardware changes.? It will be a while before it's ready to put up on GitHub, but if folks are interested, I could put up the work in progress.? I'm currently working on refining the calibration routines.
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Hi Everyone,
I have created, with Jack's help, a new site all about the T41-EP at:
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This is an 'information and background site" for the T41, not an open forum - the SCHR (this site) is the place for posting comments/suggestions about the T41.
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I intend to post lots of photos of user-built T41 rigs. I have a few already included, but would like more. If I get enough, I will create a separate gallery page of just T41 builds.
Photos should be sent to me directly at albertfpeter@... with a brief explanation. I reserve the right to edit any comments for brevity.
Let me know what you think.
Regards,
Al Peter
AC8GY
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K9HZ