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:
?
./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:
?
./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:
?
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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Re: T41 Books for sale - signed copies Latest version
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Very nice! Have you made the code available to the group?
Jack, W8TEE
On Thursday, May 22, 2025 at 04:13:24 AM EDT, Terrance Robertson, KN6ZDE via groups.io <tmrob4@...> wrote:
It can but it takes up a lot of memory.? Here's mine decoding.?
?
-- Jack, W8TEE
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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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Re: T41 Books for sale - signed copies Latest version
Bill and Al
Thanks very much for the replies. I'll get it from , though I see they're still listing the old edition as well as the new one. Luckily I was signed up to this group when all the discussions about the version were taking place so I know which one to order.
Al Thanks for the offer to scan it. A simple "to Keith, G0GNL. I hope you enjoy it" would be nice.
Jerry I don't know about "Pirate Ship" but at those rates the Starship Enterprise at warp speed seems reasonable.
Regards and thanks again ? Keith, G0GNL
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I've noticed that my radio sets its time automatically after a few minutes if I have the USB cable plugged in. I have not yet found the code that makes this happen, but I'll get there eventually.
On Thursday, May 22nd, 2025 at 3:25 AM, WF.Fiebig@... <WF.Fiebig@...> wrote:
Could the FT8 mode also be integrated into the T41?
It would also be nice if there was a way to set the time.
Best regards,
Wolfgang
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Re: Help: Audio is pumping on bands 17 and 15.
Oliver, morning.
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Yes, that has fixed the audio pumping. Thanks.
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Roger G8JWT
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It can but it takes up a lot of memory.? Here's mine decoding.?
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Could the FT8 mode also be integrated into the T41?
It would also be nice if there was a way to set the time.
Best regards,
Wolfgang
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Re: Help: Audio is pumping on bands 17 and 15.
Yes, that was my mistake. I removed the shutdown routine.
The pumping is gone.
// Uncomment the line below if your mainboard is populated with /
// the ATTiny shutdown routine activation hardware
//#define MAIN_BOARD_ATTINY_SHUTDOWN
?
Regards,
Wolfgang
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Re: T41 Books for sale - signed copies Latest version
NA that was "cheapest rate" ship. I cannot for the life of me why shipping
went thru the roof recently. There is no reason for it unless the carriers
just don't want the harder business/ want to stick to the easy gravy
stuff... like delivering packages for Amazon.
Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ VP2EHZ
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
Owner ¨C Operator
Villa Grand Piton ¨C J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email:? bill@...
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-----Original Message----- From: jerry <jerry@...> Sent: Wednesday, May 21, 2025 10:17 AM To: [email protected]Cc: K9HZ <bill@...> Subject: Re: [SoftwareControlledHamRadio] T41 Books for sale - signed copies Latest version On 2025-05-20 23:09, K9HZ wrote: I just shipped a small UPS box to the UK and it was $58. *** Was that through Pirate Ship? - Jerry, KF6VB
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K9HZ
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