On Sunday, February 23, 2025 at 02:28:04 PM EST, Bob Larkin <bob@...> wrote:
Hello All -
I? feel that I have learned a lot by reading posts here on the T41 adventure.? Thanks much.? In exchange, a heads up that I added more detail to the Tiny Ten page.? This is a different radio with different goals, but there is a lot of common heritage and it borrows, with appreciation, from many projects including the T41. ? In part, since last time,
* 10-meter output is measuring 12 ?Watts
* I-Q vector errors and SSB suppression have been measured
* As a novelty, an AM broadcast input filter was added
* TwinPeaks I-Q alignment had been left out, it is there now
* Updated schematics for both Digital & RF PCB
* The output match/filter now has two ground paths. It is better.
In general, the radio is now able to do the basic functions that were planned. ?I plan to do software improvements as there is time, but nothing is urgent.
As usual, the page is at
https://www.janbob.com/electron/TinyTen/TinyTen.htm
and comments and discussion are welcomed.
73, Bob ?W7PUA
-- Jack, W8TEE
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Hello All -
I? feel that I have learned a lot by reading posts here on the T41 adventure.? Thanks much.? In exchange, a heads up that I added more detail to the Tiny Ten page.? This is a different radio with different goals, but there is a lot of common heritage and it borrows, with appreciation, from many projects including the T41. ? In part, since last time,
* 10-meter output is measuring 12 ?Watts
* I-Q vector errors and SSB suppression have been measured
* As a novelty, an AM broadcast input filter was added
* TwinPeaks I-Q alignment had been left out, it is there now
* Updated schematics for both Digital & RF PCB
* The output match/filter now has two ground paths. It is better.
In general, the radio is now able to do the basic functions that were planned. ?I plan to do software improvements as there is time, but nothing is urgent.
As usual, the page is at
https://www.janbob.com/electron/TinyTen/TinyTen.htm
and comments and discussion are welcomed.
73, Bob ?W7PUA
|
Re: [?SDX] Digital Interface Transceiver or DIT
?here's the video for it..3
On Sunday, February 23, 2025 at 01:08:08 PM EST, Kees T via groups.io <windy10605@...> wrote:
Jack,
?
Thank you for sending the link but I'm having trouble playing the video. Do you happen to have a copy of the presentation you could forward ?
?
I was trying to get a Digital Interface Text Transceiver to perform Texting functions like many do with their iPhones today. The idea was to add a RF section to transmit actual Morse Code so the Text Transmissions could be manually copied. The Transceiver would require no speaker, no headphones, no key.....no audio at all. The only human interface is a keyboard on the display, Text Received, and Housekeeping data.
?
Since you would want to reduce the RF bandwith as much as possible reduce the Dv/Dt, etc. Call that "Fast CW". Using an external ADC and FAST Microcontroller to perform ANALOG signal processing .....is it a DOT or a DAH, remove unwanted noise, compensate background noise, etc, etc and be able to dig the signal out of the muck. Only then to you confirm it was the letter "P" and send it on for display. Weak signal detection NOT nearly as well as WISPR and other small signal algorithms but an improvement.
?
Strong signals with minimal interference are always easier to decode.
?
73 Kees K5BCQ
-- Jack, W8TEE
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On 2025-02-23 08:07, Oliver KI3P via groups.io wrote: I do easy real-time and private backup of my files over my local
network with Syncthing (). Wow, thanks for this. There are so many open source projects out there. I had never heard of syncthing. Right now, I do it with a motley collection of scripts using rsync and NFS mounts. Not perfectly reliable, and needs occasional babysitting. - Jerry, KF6VB I have a computer running in my basement that is on all the time running Syncthing, and
then have a copy running on my main laptop. I configure Syncthing to
synchronize my documents and working folders between these computers.
The outcome is that all important files on my laptop are automatically
and immediately saved to my backup computer. I then do a full disk
backup of my laptop every month or so.
If my laptop hard drive fails, I restore it from the most recent
full-disk backup. Syncthing will automatically launch on startup and
restore all my documents / working folders from the basement computer.
At worst, I will be missing a few applications that I might have
installed since the last full-disk backup.
Links:
------
[1] /g/SoftwareControlledHamRadio/message/32886
[2] /mt/111335927/243852
[3] /g/SoftwareControlledHamRadio/post
[4] /g/SoftwareControlledHamRadio/editsub/243852
[5]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy
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I have a "NAS" (Network Attached Storage) device.? It's a dual RAID so it has 2 hard drives with identical data.? If one fails, the other keeps going, and it alerts you that a drive failed.? That happened once.? You pull out the dead drive, plug in a new one, and it synchronizes.
I'm 99% on Linux, and the NAS is configured for NFS and it gets mounted to the Linux file system.? So anything I manipulate which resides on the NAS has redundancy, and I do monthly backups to 2 external hard drives, same size as in the NAS.
Then some stuff gets pushed to Google Drive.? That's manual, and so mostly for archival stuff only.? Also the NAS has a Git server!? So my repositories can push to the NAS, or push to Github.? Works great!
You may have to do some work to get a NAS configured to your specifications.? I've been highly successful with it.? Good device!? I've been using Synology for years.? And of course it's based on a Linux OS.
?
--
73 Greg KF5N
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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.
?
Roger G8JWT
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I do easy real-time and private backup of my files over my local network with Syncthing (). I have a computer running in my basement that is on all the time running Syncthing, and then have a copy running on my main laptop. I configure Syncthing to synchronize my documents and working folders between these computers. The outcome is that all important files on my laptop are automatically and immediately saved to my backup computer. I then do a full disk backup of my laptop every month or so.
?
If my laptop hard drive fails, I restore it from the most recent full-disk backup. Syncthing will automatically launch on startup and restore all my documents / working folders from the basement computer. At worst, I will be missing a few applications that I might have installed since the last full-disk backup.
?
?
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All:
First, my thanks to all who tried to help me solve my drive D problem. My first attempt was to remove the connector, clean and D-ox it, and replace it see what happened, Happy Day! It came up immediately after which I backed it up to my backup drive. 929,000+ files and almost two hours later, the backup was complete. I've run several tests and all seems well.
Again, thanks for having my back...
Jack, W8TEE
-- Jack, W8TEE
|
On 2/22/25 13:31, Greg KF5N via groups.io wrote:
You might be able to do that with a Windows machine. You can get a
USB to SATA adapter (plus power supply if required).
So you plug the damaged drive into the adapter, USB into the
working Windows machine, and a drive appears.
If the damage is only in the OS, then the data will be intact. *** Also, you can put the drive & USB adapter in the fridge or freezer, and run it from there. - Jerry, KF6VB
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My sister once had a computer that stopped working.? In her case,
the OS was messed up, not the hard drive.? It was easy to recover
the data from the hard drive using Linux.? However, it sounds like
Jack's issue is with the drive itself.? Trying different machines is
still a good idea, in case something is messed up with a Windows
driver, but it sounds like the drive itself is bad.? If it's a
mechanical drive, I've been known to slap it pretty hard a couple of
times or drop it a couple of inches, to unstick the drive.? That
might work if the drive is stuck.? If you can hear the drive
spinning up when turned on, then it's not stuck.? Throwing it
against a wall probably won't help with the drive but it may help
get rid of some frustration (hi).? Good luck, Jack.
73, John, AA0VE
On 2/22/25 13:31, Greg KF5N via
groups.io wrote:
toggle quoted message
Show quoted text
You might be able to do that with a Windows machine.? You can
get a USB to SATA adapter (plus power supply if required).
So you plug the damaged drive into the adapter,? USB into the
working Windows machine, and a drive appears.
If the damage is only in the OS, then the data will be
intact.? But it has been a long time since I tried that with
Windows.? That route may not work with the latest and greatest
Windows OS.
Anyhow those adapters are a great thing to have.? I use one
for backing up to external drives.
?
--
73 Greg KF5N
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Re: CAT with Audio Working. Sort of. Almost.
OK, we're apparently running it at 192kHz. This is supported by the PCM5102 DAC device.
Right now, I am looking through USB specs to figure out how to have the radio
tell the PC that it's 192ksp. In the "Digital Audio Interface Properties" screen, there is a dropdown menu "Select the sample rate and bit depth to be used when running in shared mode". But it's grayed out. This tells me that Windows
should at least be capable of using other bitrates than the standard 44.1ksp.
I found an audio spec on usb.org:
Using Wireshark, I was able to find the exact USB packet where the radio tells
the PC (erroneously) that the sample rate is 44100 samples per second.
AND I found it in the USB teensycore.
Gonna change it now, see what happens.
- Jerry, KF6VB
toggle quoted message
Show quoted text
On 2025-02-22 08:56, jerry-KF6VB wrote: So I have the two serial ports AND the audio device working. HOWEVER,
the audio received by the PC is
garbled. I think there is a sample rate mismatch. Are we running
the Teensy audio library at a high rate? Even for audio output?
- Jerry, KF6VB
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You might be able to do that with a Windows machine.? You can get a USB to SATA adapter (plus power supply if required).
So you plug the damaged drive into the adapter,? USB into the working Windows machine, and a drive appears.
If the damage is only in the OS, then the data will be intact.? But it has been a long time since I tried that with Windows.? That route may not work with the latest and greatest Windows OS.
Anyhow those adapters are a great thing to have.? I use one for backing up to external drives.
?
--
73 Greg KF5N
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err...Linux system...
Jack, W8TEE
On Saturday, February 22, 2025 at 02:01:59 PM EST, jjpurdum via groups.io <jjpurdum@...> wrote:
Thanks, Jim. So far, nothing has worked, but I still have a few to go. Al has a Linus system so I'll give your idea a shot, too.
Thanks!!
Jack, W8TEE
On Saturday, February 22, 2025 at 01:59:00 PM EST, Jim/G4EQX via groups.io <gts53@...> wrote:
Jack
?
You might be able to recover some of your data using a different operating system to look at the drive. If you can create a Linux system which will boot off a USB stick it will look at any drives on the system. If it can see your drive then that's a good start.
?
Alternatively if you have a Linux system you could plug your drive into it if there is a spare SATA port. On one occasion I recovered a friend's music collection this way. It was on a Windows boot drive on a laptop which was dropped. The screen shattered. I was able to see the drive on a separate Linux system and recover the media files.
?
Hope you get it sorted.
?
Jim
--
Jack, W8TEE
-- Jack, W8TEE
|
Thanks, Jim. So far, nothing has worked, but I still have a few to go. Al has a Linus system so I'll give your idea a shot, too.
Thanks!!
Jack, W8TEE
On Saturday, February 22, 2025 at 01:59:00 PM EST, Jim/G4EQX via groups.io <gts53@...> wrote:
Jack
?
You might be able to recover some of your data using a different operating system to look at the drive. If you can create a Linux system which will boot off a USB stick it will look at any drives on the system. If it can see your drive then that's a good start.
?
Alternatively if you have a Linux system you could plug your drive into it if there is a spare SATA port. On one occasion I recovered a friend's music collection this way. It was on a Windows boot drive on a laptop which was dropped. The screen shattered. I was able to see the drive on a separate Linux system and recover the media files.
?
Hope you get it sorted.
?
Jim
-- Jack, W8TEE
|
Jack
?
You might be able to recover some of your data using a different operating system to look at the drive. If you can create a Linux system which will boot off a USB stick it will look at any drives on the system. If it can see your drive then that's a good start.
?
Alternatively if you have a Linux system you could plug your drive into it if there is a spare SATA port. On one occasion I recovered a friend's music collection this way. It was on a Windows boot drive on a laptop which was dropped. The screen shattered. I was able to see the drive on a separate Linux system and recover the media files.
?
Hope you get it sorted.
?
Jim
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Re: CAT with Audio Working. Sort of. Almost.
There is an I2S bus running at 192ksps.? That drives the audio DAC (and also the ADC).? I'm referring to V11 software, V12 could be different, but probably not.
?
Now in the audio data stream (Process.cpp) the audio is interpolated up to 192ksps before driving the output.? So you could tap in at some point before the interpolation
and it might work better.? Experiments could be easily tried.
?
Anyhow, the Open Audio library can re-sample to 44.1ksps, and then you can drive a USB output object.? In theory anyway, I haven't tried that.? You should get clean audio.
I went through this same process recently, it looked to be more trouble that it was worth because 48ksps is not in the audio library, and I bailed out to a lazy man's (practical) hardware solution.
I think we need to nicely ask Paul to get other sample rates added to the audio library.
?
It is also interesting that the original convolution receiver project could change sample rates.? T41EEE is now running the transmitter at 48ksps, and also the receiver at 48ksps (receiver during calibration only).
A future version of T41EEE will have more flexible sample rates for both transmitter and receiver.? This will simplify the zoom and hopefully get power consumption reduced (low power battery mode).
?
--
73 Greg KF5N
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It's an experimental platform, and it would make an interesting experiment:
- S/PDIF
- The I2S port may be used to receive and transmit S/PDIF. The S/PDIF is independent of both I2S/TDM ports and can be used simultaneously. Either or both of the I2S ports may also be used to transmit S/PDIF.
It's a hack because it corrupts the official and very thoroughly tested TeensyDuino package.? Now if you have trouble with something, and you go ask for assistance, and you say "oh, by the way I've changed a bunch of files", you may not get good service.? And then every time the package is updated, you have to go and re-certify your changes.? For me, doing this as a fun hobby, that's over the line of what I want to do.? Just my own individual perspective
as a retired person working on amateur radio stuff for fun.
?
Now if we could present these changes and ask them to be incorporated into the official and supported release, that would be great!? I would switch to USB audio in a heartbeat.
?
--
73 Greg KF5N
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I am not sure I would call the changes to the Audio library a
Hack, but each to his own.
At least it does not require any hardware changes and a SPDIF
interface on the PC.
Also it would mean the interrupt lines from the MCP23017 front
panel would have to be moved as they use 14 and 15 which the SPDIF
uses.
-- John G0ORX
On 2/22/25 16:39, Greg KF5N via
groups.io wrote:
toggle quoted message
Show quoted text
Hi John, the Teensy already supports, without hacks, 192k
audio via the SPDIF port.
I built a prototype Main board with SPDIF and it works.? So
that's an alternative that bypasses hackage of the TeensyDuino
package.
I took the SPDIF port out of the released T41-2 Main board, but
I may put it back in the next version.
?
--
73 Greg KF5N
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CAT with Audio Working. Sort of. Almost.
So I have the two serial ports AND the audio device working. HOWEVER, the audio received by the PC is
garbled. I think there is a sample rate mismatch. Are we running the Teensy audio library at a high rate? Even for audio output?
- Jerry, KF6VB
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jjpurdum
Wayde VA3NCA/AD2GX