Now I think it would be pretty slick to have a FreeDV codec2 integration.?
I'm not a very good coder but I can see that hooking to the library would be similar to the way FLDigi is tied in.
We'd need to route the audio chain to/from the W<8731 and then port the FreeDV to/from the USB headset. the rest is just triggering TX and I asserting the codec2 to encode/decode.
I think this would be a super cool additional mode to bake in
what say you?
|
Re: Playing with Sbitx software without Sbitx
Ryan -?
To get the software to run I found you need a minimum of the WM8731 codec and an SI-5351 connected to a Pi 3 or 4.? I used an Adafruit style SI-5351 module and a WM8731 proto type board from ?.? You also need a monitor.? The build is optimized for the 7" pi touch screen.? I found a wireless keyboard and mouse to also be very useful.
See my blog at and other posts here on the board for more info,
73,
Dean
KK4DAS
|
JJ I have seen this GPIO error a few times after invoking an apt upgrade. I just reflashed instead of diagnosing it.? But I am glad you experienced it as well .?
On Sun, Mar 31, 2024 at 4:09?AM JJ - W9JES < w9jes@...> wrote: Well.. I narrowed down the problem packages..
linux-headers-rpi-2712/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-headers-rpi-v8/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-image-rpi-2712/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-image-rpi-v8/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-libc-dev/stable,stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
Now I am seeing this error..
pi@sbitx:~/sbitx $ ./sbitx?
sbitx v3.02
gpio: Unable to open GPIO direction interface for pin 17: No such file or directory
wiringPiISR: unable to open /sys/class/gpio/gpio17/value: No such file or directory
Will have to continue troubleshooting - possibly related to WiringPi. config.txt looks good and so does gpio readall.
-JJ
|
Re: Ubitx AGC board by Kit-Projects
John,
Will this mod work with a Bitx 40?
Thanks and 73's, Phil? KC2YLM
|
Ashhar, thanks for the gentle correction on the IF frequency. Gordon KX4Z
On Sun, Mar 31, 2024 at 1:30?AM Ashhar Farhan < farhanbox@...> wrote: Raj, The rejection is o?ly 40dB. You need at least 70 db opposite sideband rejection. When you design larger bandwidth, the out of passband rejection decreases
Farhan,
How about is we use this one ?
Raj
On 31/03/2024 9:18 AM, Ashhar Farhan
wrote:
There is a 40 MHz crystal filter with 25 KHz
bandpass that puts a physical limit on the span.
- f
You can¡¯t, because the crystal filter at 45
MHz and sampling rate using the inexpensive A/D will not
allow a wider waterfall
Gordon Kx4z?
?
Hi Mike:
I'm not sure what the rig uses for
its ADC/DAC, but those play a limiting role in the
meaningful range of the spectrum and waterfall
displays. I'm no EE guy, but the hardware puts
severe limits on what software can do to present
information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM
EDT, Mike WA0YCN < mgassman@...>
wrote:
Has there been any
change with v3 to support a wider waterfall
width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
--
Jack, W8TEE
|
DigiKey has them for a little over $3 each. ? I have used several of them with uBITX transceivers. ?All good results. ? Bob WB8BEL
toggle quoted message
Show quoted text
On Mar 31, 2024, at 8:20?AM, Petr Ourednik <indians@...> wrote:
? Paul,?
thanks for hint. Do not know where you got it but Mouser has?AOM-5024L-HD-R where I am not sure what the ¡°L¡± means but it has 24dB sensitivity at 2.2kOhms.
rgds,
--
Petr?
|
Paul,?
thanks for hint. Do not know where you got it but Mouser has?AOM-5024L-HD-R where I am not sure what the ¡°L¡± means but it has 24dB sensitivity at 2.2kOhms.
rgds,
--
Petr?
|
Problem SOLVED
The grandchildren haven't arrived yet, so I made a backup on one of the 3 uSD cards, then booted from yesterday's uSD card backup.
Update, then I downloaded the upgradable list, which I wanted to copy into a text file. Then the icons disappeared and I couldn't do the copying.
I turned it off and restarted from the usb3.1 stick. Update again, get a list, then upgrade and copy the operation and the list to a text file.
Now the DSI screen does not flash after the upgrade.
The error was caused by the uSD card used as a backup.
Fortunately, I mark the uSD cards with colors so that I don't mix them up, so it can be determined that this card is indeed faulty.
I ask for everyone's forgiveness and understanding.
I hope the followers learn from this too.
--
Gyula HA3HZ
|
Well.. I narrowed down the problem packages..
linux-headers-rpi-2712/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-headers-rpi-v8/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-image-rpi-2712/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-image-rpi-v8/stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
linux-libc-dev/stable,stable 1:6.6.20-1+rpt1 arm64 [upgradable from: 1:6.1.73-1+rpt1]
Now I am seeing this error..
pi@sbitx:~/sbitx $ ./sbitx?
sbitx v3.02
gpio: Unable to open GPIO direction interface for pin 17: No such file or directory
wiringPiISR: unable to open /sys/class/gpio/gpio17/value: No such file or directory
Will have to continue troubleshooting - possibly related to WiringPi. config.txt looks good and so does gpio readall.
-JJ
|
How do I know if the OS is using Wayland or X?
I use sbitx with my own DSI monitor (800x400) and an HDMI monitor (1920x1080). This error only occurs when I do the upgrade. Some update will spoil the previous quality. It only spoils the display of the DSI monitor. HDMI works fine.
It also happened a few days ago, because I didn't know how to fix the log program I was using, so it was a backup and then an update. Then, for the first time, the DSI screen had only gray horizontal lines, which were flashing. The image was not visible.
In order to experiment with it, I have to upgrade again.
The grandkids will be here today, so I'll do that later.
--
Gyula HA3HZ
|
?There are a few discussion topics on this subject. The primary solution to begin with is to replace the electret microphone insert with one that has a sensitivity of at least -24db, the part number I used and found on a well known auction site is AOM-5024-HD-R
It made a huge difference and I only needed the mic gain setting at about 27 once fitted to get near full power out without distortion.
If you connect a dummy load to the antenna and then key the microphone without speaking you should see a straight line until you speak, thats a crude but effective way to ensure that only your voice is being picked up by the microphone audio system. Worked for me
Regards
Paul G0KAO
|
Raj, The rejection is o?ly 40dB. You need at least 70 db opposite sideband rejection. When you design larger bandwidth, the out of passband rejection decreases
Farhan,
How about is we use this one ?
Raj
On 31/03/2024 9:18 AM, Ashhar Farhan
wrote:
There is a 40 MHz crystal filter with 25 KHz
bandpass that puts a physical limit on the span.
- f
You can¡¯t, because the crystal filter at 45
MHz and sampling rate using the inexpensive A/D will not
allow a wider waterfall
Gordon Kx4z?
?
Hi Mike:
I'm not sure what the rig uses for
its ADC/DAC, but those play a limiting role in the
meaningful range of the spectrum and waterfall
displays. I'm no EE guy, but the hardware puts
severe limits on what software can do to present
information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM
EDT, Mike WA0YCN < mgassman@...>
wrote:
Has there been any
change with v3 to support a wider waterfall
width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
--
Jack, W8TEE
|
Farhan,
How about is we use this one ?
Raj
On 31/03/2024 9:18 AM, Ashhar Farhan
wrote:
toggle quoted message
Show quoted text
There is a 40 MHz crystal filter with 25 KHz
bandpass that puts a physical limit on the span.
- f
You can¡¯t, because the crystal filter at 45
MHz and sampling rate using the inexpensive A/D will not
allow a wider waterfall
Gordon Kx4z?
?
Hi Mike:
I'm not sure what the rig uses for
its ADC/DAC, but those play a limiting role in the
meaningful range of the spectrum and waterfall
displays. I'm no EE guy, but the hardware puts
severe limits on what software can do to present
information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM
EDT, Mike WA0YCN < mgassman@...>
wrote:
Has there been any
change with v3 to support a wider waterfall
width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
--
Jack, W8TEE
|
Can anyone report on the power output transmitting in SSB at a level before distortion starts.
I couldn't get any decent audio with the original firmware. I tried a different microphone (that works with my FX-4CR). Increasing the mic gain
showed distortion and oscillation.
After installing the 64bit version of W9JES I have a clear modulation but less than a watt output.
I would like to know what is the power output that others reach in SSB without distortion. And if possible what is the level of the audio signal
?at the input of the audio IC WM873, at the collector of Q1 before you reach distortion ( or oscillation).
After installing the W9JES firmware this seems to be the last hurdle I have with the sBitx.
Thanks for any useful information on this subject.
|
There is a 40 MHz crystal filter with 25 KHz bandpass that puts a physical limit on the span. - f
You can¡¯t, because the crystal filter at 45 MHz and sampling rate using the inexpensive A/D will not allow a wider waterfall
Gordon Kx4z? ?
Hi Mike:
I'm not sure what the rig uses for its ADC/DAC, but those play a limiting role in the meaningful range of the spectrum and waterfall displays. I'm no EE guy, but the hardware puts severe limits on what software can do to present information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM EDT, Mike WA0YCN < mgassman@...> wrote:
Has there been any change with v3 to support a wider waterfall width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
-- Jack, W8TEE
|
You can¡¯t, because the crystal filter at 45 MHz and sampling rate using the inexpensive A/D will not allow a wider waterfall
toggle quoted message
Show quoted text
On Mar 30, 2024, at 22:14, Jack, W8TEE via groups.io <jjpurdum@...> wrote:
?
Hi Mike:
I'm not sure what the rig uses for its ADC/DAC, but those play a limiting role in the meaningful range of the spectrum and waterfall displays. I'm no EE guy, but the hardware puts severe limits on what software can do to present information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM EDT, Mike WA0YCN <mgassman@...> wrote:
Has there been any change with v3 to support a wider waterfall width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
-- Jack, W8TEE
|
Hi Mike:
I'm not sure what the rig uses for its ADC/DAC, but those play a limiting role in the meaningful range of the spectrum and waterfall displays. I'm no EE guy, but the hardware puts severe limits on what software can do to present information on the display.
Jack, W8TEE
On Saturday, March 30, 2024 at 09:22:31 PM EDT, Mike WA0YCN <mgassman@...> wrote:
Has there been any change with v3 to support a wider waterfall width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
-- Jack, W8TEE
|
Has there been any change with v3 to support a wider waterfall width (e.g. 100 kHz or wider)?
--
Mike
WA0YCN
|
Re: Ubitx AGC board by Kit-Projects
I think I may have referred to this circuit, in my video, as an AGC, but it's an Automatic Level Control (ALC), so adjusts the volume, not the RF signal strength into the receiver.
The install is very simple - remove R70, and the ALC connects where R70 was connected.
I just got the second batch of prototype boards in yesterday.? I'm going to size the board down just a little bit more and I should have those in by next weekend.
I'll post a photo of the bare board and a completed board next weekend.
The circuit uses a TDA7284, which is actually not recommended for new circuit designs.? But, the circuit works so well, and these chips are still available in pretty good sized quantities (as far as a project for ham radio goes), so that's why I went ahead and used it.? Eventually, I might have to redesign the circuit to use a newer chip of the same type.? But I won't worry about that now.? I may keep a quantity of the TDA7284 on hand to make it easy for anyone to get them that wants to try out this circuit.
By the way, this circuit should work in any receiver, with little or no modifications.
Someone had asked about an S-meter connection and this circuit does not have that....yet.? I'm still working that.
|
Try this...
- Go to the Pi menu
- Open Preferences
- Open Raspberry Pi Configuration
- Select the Display tab
- Change the Headless Resolution to 800X600
- Reboot
Let me know if that helps.. I will patch this in the next release. -JJ
|
HA3HZ
Raj vu2zap