Re: slow starting on T41 kit
Thanks! good to hear, I'm out the door going to work. Ron VE8RT On Tue, 25 Feb 2025 13:52:38 +0000 (UTC) "jjpurdum via groups.io" <jjpurdum@...> wrote: The Teensy 4.1 will work if it has the ethernet connector, it just costs a little more. The audio hat is for the Teensy 4.0 or 4.1 is fine.
Jack, W8TEE
On Monday, February 24, 2025 at 11:17:24 PM EST, Ron VE8RT <ve8rt@...> wrote:
Quick question before I pay for my order, I found a couple of audio
boards but this one seems to fit what I've found in the group messages.
? - its the T41 with the ethernet connector (the non ethernet version
is out of stock), and
? - the Audio board for use with Teensy 4.0 - 4.1, (Rev D)
? I've found the info on the display and will order it.
? ? Ron VE8RT
On Mon, 24 Feb 2025 13:26:39 +0000 (UTC)
"jjpurdum via groups.io" <jjpurdum@...> wrote:
? Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site.
Jack, W8TEE
? ? On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:?
?
? ? I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023.? The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.?
? Before I dive into building it are there modifications or other that
I should do right away?? The 5 inch display and other not included in
the box I should get on order ASAP.? Retirement should have happened in
2020, hopefully this later this year.
? Ron VE8RT
--
Ron VE8RT <ve8rt@...>
?
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: slow starting on T41 kit
Everything has been ordered. After reading the messages regarding display noise and 3.3 vs 5.0 volt options I ordered the 5.0 volt display. Ron VE8RT On Mon, 24 Feb 2025 06:40:59 -0700 "Ron VE8RT" <ve8rt@...> wrote: Thank you,
I'll carry on, appreciate your saving me scanning over a year's of
posts to the lists to check for recommended changes since my kit
arrived.
So wishing that I was retired already, I'll be 70 this year. Stuck
around because my boss www.buffaloairways.com won't hire an apprentice
or replacement, I'm one of the old guys with experience on his own
fleet plus the DC's, C-54 (retired now), L-188, and our fire fighting
fleet which includes CL-215s (piston ones from the 60's). The next few
weeks is my break before fire season gets going again (not only
lightning, also re-animated zombie fires).
The required parts will be ordered this week.
73 Ron VE8RT
On Mon, 24 Feb 2025 13:26:39 +0000 (UTC)
"jjpurdum via groups.io" <jjpurdum@...> wrote:
Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site.
Jack, W8TEE
On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:
? I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023.? The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.?
? Before I dive into building it are there modifications or other that
I should do right away?? The 5 inch display and other not included in
the box I should get on order ASAP.? Retirement should have happened in
2020, hopefully this later this year.
? Ron VE8RT
--
Ron VE8RT <ve8rt@...>
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: slow starting on T41 kit
The Teensy 4.1 will work if it has the ethernet connector, it just costs a little more. The audio hat is for the Teensy 4.0 or 4.1 is fine.
Jack, W8TEE
On Monday, February 24, 2025 at 11:17:24 PM EST, Ron VE8RT <ve8rt@...> wrote:
Quick question before I pay for my order, I found a couple of audio
boards but this one seems to fit what I've found in the group messages.
? - its the T41 with the ethernet connector (the non ethernet version
is out of stock), and
? - the Audio board for use with Teensy 4.0 - 4.1, (Rev D)
? I've found the info on the display and will order it.
? ? Ron VE8RT
On Mon, 24 Feb 2025 13:26:39 +0000 (UTC) "jjpurdum via groups.io" <jjpurdum@...> wrote: >? Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site. > Jack, W8TEE >? ? On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT < ve8rt@...> wrote:? >? >? ? I was furtunate enough to received from Ron AG1P a T41 kit back in > December of 2023.? The plan to get to it in early 2024 didn't work out, > I've just this last week gone through the box and have a good start on > the book.? > > ? Before I dive into building it are there modifications or other that > I should do right away?? The 5 inch display and other not included in > the box I should get on order ASAP.? Retirement should have happened in > 2020, hopefully this later this year. > > ? Ron VE8RT > > -- > Ron VE8RT < ve8rt@...> > > > > > >? > > > > > -- Ron VE8RT < ve8rt@...>
-- Jack, W8TEE
|
Re: slow starting on T41 kit
Quick question before I pay for my order, I found a couple of audio boards but this one seems to fit what I've found in the group messages. - its the T41 with the ethernet connector (the non ethernet version is out of stock), and - the Audio board for use with Teensy 4.0 - 4.1, (Rev D) I've found the info on the display and will order it. Ron VE8RT On Mon, 24 Feb 2025 13:26:39 +0000 (UTC) "jjpurdum via groups.io" <jjpurdum@...> wrote: Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site.
Jack, W8TEE
On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:
? I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023.? The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.?
? Before I dive into building it are there modifications or other that
I should do right away?? The 5 inch display and other not included in
the box I should get on order ASAP.? Retirement should have happened in
2020, hopefully this later this year.
? Ron VE8RT
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: T41 SDT Version 66 with Calibration
On Mon, Feb 24, 2025 at 04:31 PM, Oliver KI3P wrote:
Some people report success running the CPU at 528 MHz
Here's the background for reference. This discusses Teensy life vs clock speed/temperature.? It includes the following graphic:
: "Yes, indeed, the moral of this story is you need to do something (or simply avoid doing certain things) to keep the internal temperature below 95¡ãC if you want the chip to last more than 3 years".
?
I don't think the T41 has a problem running at 600 MHz with proper cooling as designed.? My 4SQRP T41 doesn't come close to that even decoding FT8 internally and I haven't even installed the fan yet, though it uses a switching 3.3V regulator and the top and side are off the case to allow easy access.? If you're concerned, run at 528 MHz.? I haven't noticed a difference at that speed.? The code will run at a slower rate as well.? Eventually the processor load will increase to 100%, I think at 150 MHz. Not much going on there.
|
Re: T41 SDT Version 66 with Calibration
Install the following libraries via the Arduino Library Manager:
- Adafruit MCP23017 Arduino Library, by Adafruit (v2.3.2) (note: install with dependencies)
- Adafruit GFX Library, by Adafruit (v1.11.11) (note: install with dependencies)
- ArduinoJson, by Benoit Blanchon (v7.3.0)
- Chrono, by Thomas O. Fredericks (v1.2.0)
- Timer, by Stefan Staub (v1.2.1)
Several libraries need to be installed manually. The manual process is:
- Go to the provided GitHub link for the library and download the library as a zip by clicking Code -> Download ZIP.
- Import it into the Arduino 2 IDE by clicking Sketch -> Include Library -> Add .ZIP library, and then selecting the file you just downloaded.
The libraries to install using this process are:
- OpenAudio:
- Regressino:
- Arduino Regression:
?
The file Config.h includes several compiler options which add, subtract, or adjust parameters of some features. Please review this file prior to compilation.
Completing a FLASH erase of the Teensy is strongly recommended before uploading this new version. The instructions for performing a FLASH erase of the Teensy are at under the bullet "Memory Wipe & LED Blink Restore".
Select the Teensy 4.1 board, and select the following build configuration options:
- Tools->Optimize->Fast with LTO
- Tools->USB Type->Dual Serial
- Tools->CPU Speed->600 MHz
Some people report success running the CPU at 528 MHz. The memory usage after compiling should look like this:
FLASH: code:272292, data:129336, headers:8988 free for files:7715848
RAM1: variables:178112, code:249800, padding:12344 free for local variables:84032
RAM2: variables:474720 free for malloc/new:49568
|
Re: T41 SDT Version 66 with Calibration
Having problems adding this library:
?
21 | #include <LinearRegression.h> ? ? ?// https://github.com/cubiwan/Regressino/
? ? ? | ? ? ? ? ?^~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Compilation error: LinearRegression.h: No such file or directory
?
Roger G8JWT
|
?
To avoid confusion from multiple in-development code versions flying around, I've made the github repository for the Version 63 code private. Al and Jack are actively working on the code, so that github repository is an outdated alpha version at best and shouldn't be used by anyone. When they conclude their work I'll post the release version back on that repository and make it public again. Sorry for the confusion!
?
See this forum post for the latest beta code from Al:
?
?
|
T41 SDT Version 66 with Calibration
Hi Everyone,
I have attached the latest version of the T41 code. I believe it is in good shape but has yet to be thoroughly vetted. I am posting it now, ahead of a formal release to enable some of the builders who are having a difficult time with earlier versions to run a known working version.
This version has the latest Calibration routines; however, it has not gone through Jack's review yet. Jack and I agreed to put this out temporarily so you can give it a try.
Please report any issues to Jack and me.
We will review the code and post a final release in a week or so.
I am also attaching a copy of the Calibration instructions PDF. You will also find abbreviated instructions in each calibration routine.
?
Note that this is for V12.6 hardware only. Some of the calibration routines will not work with V11 or earlier.
?
It is good practice to erase the Teensy4.1 prior to up-loading, since much of the EEPROM has changed. To clear all memory, press and hold the Teensy load button until the LED by the USB port flashes. Release and wait until the main LED begins to flash. The Blink program is then loaded and EEPROM is cleared.
In the code go the Setup in the .ino file and uncomment the line at 3130 the first time you upload. Comment out that line the next time you upload.
In the IDE select "Optimize: Faster with LTO", set the USB type to "Serial". You may have to select the Teensy port the first time you upload.
?
We encourage everyone to upgrade to V12.6 Main and RF boards. The V12.6 performance is greatly enhanced.
Good luck and let us know how it works for you.
Regards,
Al Peter
AC8GY
|
Follow Jack¡¯s Advice¡ ? ? Dr. William J. Schmidt - K9HZ 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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|
Bill, what and where is the latest software?
?
Roger G8JWT
|
Jack, it was from a post from several weeks ago .
Version
63-1
This
version of the code corresponds to the upcoming 4th edition of
"Digital Signal Processing and Software Defined Radio: Theory and
Construction of the T41-EP Software Defined Transceiver" by Albert
F. Peter, AC8GY and Dr Jack Purdum, W8TEE. It is a point release
of the software which contains the features and capabilities
described in the book and works on V12 hardware only. Ongoing
development of the code base is captured in the companion
repository?.
On 2/24/2025 1:16 PM, jjpurdum via
groups.io wrote:
Where did that code come
from?
Jack, W8TEE
On Monday, February 24, 2025 at 11:22:34 AM EST, Robert
Luken W3RDL via groups.io
<now.w3rdl@...> wrote:
I installed all of the required libraries and
compiled this version. Looks good, but when I tried to
do the Receiver Calibration, it worked like the
directions(some of the switches were mapped
differently), but when I pressed Select to save, it
returned to the normal display with a lot of the text
from the cal screen overlaid and was non functional. I
had to cycle power to get it working again. I tried
several bands and got the same behavior, however the I
& Q corrections were stored in EEPROM. Do I just
need to reset the Teensy to Blink and try again, or is
there a S/W problem?
--
Jack, W8TEE
--
73
Bob W3RDL
|
Where did that code come from?
Jack, W8TEE
On Monday, February 24, 2025 at 11:22:34 AM EST, Robert Luken W3RDL via groups.io <now.w3rdl@...> wrote:
I installed all of the required libraries and compiled this
version. Looks good, but when I tried to do the Receiver
Calibration, it worked like the directions(some of the switches
were mapped differently), but when I pressed Select to save, it
returned to the normal display with a lot of the text from the cal
screen overlaid and was non functional. I had to cycle power to
get it working again. I tried several bands and got the same
behavior, however the I & Q corrections were stored in EEPROM.
Do I just need to reset the Teensy to Blink and try again, or is
there a S/W problem?
--
73
Bob W3RDL
-- Jack, W8TEE
|
There¡¯s a lot to that¡? I would suggest using the latest software version though¡ and start in the definitions section where the arrays are defined for the bands. ? ? Dr. William J. Schmidt - K9HZ 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of bty84827531 via groups.io
Sent: Sunday, February 23, 2025 10:27 AM
To: [email protected]
Subject: [SoftwareControlledHamRadio] 160 metres? Can someone please explain how to turn back on 160 metres and turn off any other band in SDTVer053? I've had a go at it but it seems there are several tabs involved.
|
Its perfectly acceptable to wind turns over turns¡ ? ? Dr. William J. Schmidt - K9HZ 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: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of Tim via groups.io
Sent: Sunday, February 23, 2025 5:18 PM
To: [email protected]
Subject: [SoftwareControlledHamRadio] BPF L292? When you get to? L292 | 3.6 uH | 20 | 38 | T37-10 | Black | 20" of #28 wire, 38T on T37-10 | ? |
You might want to drop down a wire size to #30? I had trouble getting the ones done with 32 turns let alone 38! #30 I was able to get 38 turns. Frim memory wire size is not that critical just number of turns. I will send SA plot of 30M later to see if it made a difference. These filters are fairly wide (I plotted 80 and 20m so far) to start with so I doubt there is much difference.?
|
I installed all of the required libraries and compiled this
version. Looks good, but when I tried to do the Receiver
Calibration, it worked like the directions(some of the switches
were mapped differently), but when I pressed Select to save, it
returned to the normal display with a lot of the text from the cal
screen overlaid and was non functional. I had to cycle power to
get it working again. I tried several bands and got the same
behavior, however the I & Q corrections were stored in EEPROM.
Do I just need to reset the Teensy to Blink and try again, or is
there a S/W problem?
--
73
Bob W3RDL
|
Re: slow starting on T41 kit
Thank you, I'll carry on, appreciate your saving me scanning over a year's of posts to the lists to check for recommended changes since my kit arrived. So wishing that I was retired already, I'll be 70 this year. Stuck around because my boss www.buffaloairways.com won't hire an apprentice or replacement, I'm one of the old guys with experience on his own fleet plus the DC's, C-54 (retired now), L-188, and our fire fighting fleet which includes CL-215s (piston ones from the 60's). The next few weeks is my break before fire season gets going again (not only lightning, also re-animated zombie fires). The required parts will be ordered this week. 73 Ron VE8RT On Mon, 24 Feb 2025 13:26:39 +0000 (UTC) "jjpurdum via groups.io" <jjpurdum@...> wrote: Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site.
Jack, W8TEE
On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:
? I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023.? The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.?
? Before I dive into building it are there modifications or other that
I should do right away?? The 5 inch display and other not included in
the box I should get on order ASAP.? Retirement should have happened in
2020, hopefully this later this year.
? Ron VE8RT
--
Ron VE8RT <ve8rt@...>
-- Ron VE8RT <ve8rt@...>
|
Re: slow starting on T41 kit
Your kit does not include the Teensy 4.1 or the Audio Hat, either (available from PJRC.com). The display is ordered from BuyDisplay.com and is a Chinese company so it will take some time. The correct model number is in the Files section of this site.
Jack, W8TEE
On Sunday, February 23, 2025 at 11:20:41 PM EST, Ron VE8RT <ve8rt@...> wrote:
? I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023.? The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.?
? Before I dive into building it are there modifications or other that
I should do right away?? The 5 inch display and other not included in
the box I should get on order ASAP.? Retirement should have happened in
2020, hopefully this later this year.
? Ron VE8RT
--
-- Jack, W8TEE
|
I was furtunate enough to received from Ron AG1P a T41 kit back in
December of 2023. The plan to get to it in early 2024 didn't work out,
I've just this last week gone through the box and have a good start on
the book.
Before I dive into building it are there modifications or other that
I should do right away? The 5 inch display and other not included in
the box I should get on order ASAP. Retirement should have happened in
2020, hopefully this later this year.
Ron VE8RT
--
Ron VE8RT <ve8rt@...>
|
When you get to?
| L292 |
3.6 uH |
20 |
38 |
T37-10 |
Black |
20" of #28 wire, 38T on T37-10 |
? |
?
You might want to drop down a wire size to #30?
I had trouble getting the ones done with 32 turns let alone 38!
#30 I was able to get 38 turns.
Frim memory wire size is not that critical just number of turns.
I will send SA plot of 30M later to see if it made a difference.
These filters are fairly wide (I plotted 80 and 20m so far) to start with so I doubt there is much difference.?
Tim W4YN?
|
jjpurdum
K9HZ