Re: SSB transmission

On Sun, Mar 31, 2024 at 12:29 PM, Yvon AE7YD wrote:

Thank you Paul.
Unfortunately in my case it is not the mike. I tried different microphones and also with an external amplifier/equalizer/compressor and that didn't help.
That is why I would like to know the AC voltage at the output of the transistor Q1 to have a starting point in debugging. There is nothing else between the mike and the WM873.
As mentioned since installing the W9JES firmware at least the audio is good but hardly going above one watt.
The 2Tone power output is about 17w in a dummy load.
I didn't yet measure the output of Q1 but will do soon.

Have you tried a USB microphone to see if you get better results?? I released an app to use USB input devices in Toolbox v2.2. Since you are using my build, you can do this to update Toolbox on the beta build using terminal.

cd $HOME

cd sBITX-toolbox/

./uninstaller.sh?

cd $HOME

git clone https://github.com/drexjj/sBITX-toolbox64.git

cd sBITX-toolbox64

chmod +x *.sh

./installer.sh

-JJ

?

Re: After Bookworm 64 bit upgrade, the DSI monitor flickers #Raspberry4B #sBITX_v3

#110279

We will let the dust settle.. There is obviously an issue with these packages on Pi4

pi@sbitx:~ $ sudo apt-get upgrade

Reading package lists... Done

Building dependency tree... Done

Reading state information... Done

Calculating upgrade... Done

The following packages have been kept back:

? linux-headers-rpi-2712 linux-headers-rpi-v8 linux-image-rpi-2712

? linux-image-rpi-v8

-JJ

?

Re: After Bookworm 64 bit upgrade, the DSI monitor flickers #Raspberry4B #sBITX_v3

#110278

I should also say that these files do change config.txt and other settings. Previous changes to make the sBitx work will be overwritten. I have not had the energy or time to understand what and why - enjoying my time with family today.

sudo apt list --upgradable

Listing... Done

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]

-JJ

?

Re: sBITX Toolbox - A great companion for the sBitx transceiver is now available for public release #file-notice #sBitx #sbitx_v2 #sBITX_v3 #wiki-notice

#110277

On Sun, Mar 31, 2024 at 10:43 AM, Dean Souleles wrote:

Charudatt,

The software runs fine without the SWR/PWR bridge, ATTiny chip or the RTC clock module installed.? No changes required,

The frequency calibration is a one-time thing and not worth putting into code.? Inject a known 10MHz frequency into the receiver and zero beat to see how farr off the calibration is.? Then make small changes is SI5451V2.c to this line and retest:

int xtal_freq_calibrated =?25000000; // tcxo

BIG HINT - per my other posts on this topic - if you are using the MIKROE proto board for the WM8731 you need to swap out the 12.288MHZ crystal for a 12MHz crystal or you will not be able to align the frequency across all of HF.? This hint alone would have saved me weeks of fruitless debugging.

73,
Dean
KK4DAS

Hi Dean

Thank you for your valuable input on this. I hope you have a happy Easter!

-JJ

Re: After Bookworm 64 bit upgrade, the DSI monitor flickers #Raspberry4B #sBITX_v3

#110276

On Sun, Mar 31, 2024 at 12:42 PM, HA3HZ wrote:

This uSD card just tricked me. I bought 4 at the same time, three of which are still working. I don't know how long a uSD card lasts? It comes from a well-known manufacturer, evo+ 64GB, white color. One piece is permanently switched on in the camera, the rest I used here as an RPi backup. I look around a bit to see what I can expect. My trust in reliability has now been shaken.
--
Gyula HA3HZ

I spent a good amount of time on this issue and found that the Pi update downloaded some incompatible files yesterday for whatever reason. The Pi distro was corrected sometime today and now downloads the correct files for the Pi4 platform. Someone fell asleep at the wheel over at Pi foundation HQ.?

This is now a non-issue for my build using the update/upgrade procedure.

FWIW- I recompiled WiringPi and reset the soundmapping to get it to work but the display was still having issues. Reflashed to Beta2 and performed an upgrade this morning and everything went smooth.

-JJ

Re: Voltage input on screen?

#110275

The speaker will be the best voltage indicator. Because the LM380 audio amplifier IC does not work below 10V, So, if the speaker does not sound, then the voltage is less than 10V.
Don't ask how I know. The headphone output can still be used.
--
Gyula HA3HZ

Re: After Bookworm 64 bit upgrade, the DSI monitor flickers #Raspberry4B #sBITX_v3

#110274

This uSD card just tricked me. I bought 4 at the same time, three of which are still working. I don't know how long a uSD card lasts? It comes from a well-known manufacturer, evo+ 64GB, white color. One piece is permanently switched on in the camera, the rest I used here as an RPi backup. I look around a bit to see what I can expect. My trust in reliability has now been shaken.
--
Gyula HA3HZ

Re: SSB transmission

#110273

Thank you Paul.
Unfortunately in my case it is not the mike. I tried different microphones and also with an external amplifier/equalizer/compressor and that didn't help.
That is why I would like to know the AC voltage at the output of the transistor Q1 to have a starting point in debugging. There is nothing else between the mike and the WM873.
As mentioned since installing the W9JES firmware at least the audio is good but hardly going above one watt.
The 2Tone power output is about 17w in a dummy load.
I didn't yet measure the output of Q1 but will do soon.

Re: UBitx v6 - no transmit power

#110272

Hi All,
I've checked voltages on the board, in most instances during tx and rx, against the uBitxV4 data sheet (I couldn't find q71 to q73 - perhaps not on v6 board)

Most things were pretty close eg Q90 TX was 10.79 3.43 2.71, against the V4 figures of 11.55 3.66 3.04
Q911/912 11.05 0.90 0.32 against 11.8 1.07 0.49

However, when I measured Q10, Q20, Q30,Q40 readings were all over the place. Q10, Q11, Q12 TX voltages on Collector were all 0v, against v4 readings of 7.47v, 11.58v. 11.58v respectively.

Q20, 21, 22 RX voltages C B and E were all 0v
Q30, 31, 32 TX voltages C B and E were all 0v
Q40, 41, 42 RX voltages C B and E were all 0v

Not wishing to waste anyone's time, am I reading the data sheet correctly?

Thanks as ever,
Nick

Voltage input on screen?

#110271

I typically use the sBitx on battery power, usually larger RC 3S Lipo Packs.? Is there any way to see the input voltage on screen?? Or do these sensors exist on the board already??

?

Thank you,
Jared

Re: sBITX Toolbox - A great companion for the sBitx transceiver is now available for public release #file-notice #sBitx #sbitx_v2 #sBITX_v3 #wiki-notice

#110270

Thanks Dean for your inputs.?

I have my own PCB drafted for the project and have already incorporated the 12 Mhz input for the WM8731 chip.?

Sooner, I'll share my project details with the group as well as PCB files

regards

charudatt - vu2upx

Show quoted text

On Sun, 31 Mar, 2024, 9:14 pm Dean Souleles, <dsouleles@...> wrote:

On Fri, Mar 29, 2024 at 12:21 PM, Charudatt Uplap wrote:

I'm homebrewing the sBITX and building only the Exciter board at the present.?
?

Although I have a provision for the ATTiny chip on board I don't plan to use it or bypass it.?

?

For the Si5351, I wanted an easy way to calibrate or set the exact clock frequency

Charudatt,

The software runs fine without the SWR/PWR bridge, ATTiny chip or the RTC clock module installed.? No changes required,

The frequency calibration is a one-time thing and not worth putting into code.? Inject a known 10MHz frequency into the receiver and zero beat to see how farr off the calibration is.? Then make small changes is SI5451V2.c to this line and retest:

int xtal_freq_calibrated =?25000000; // tcxo

BIG HINT - per my other posts on this topic - if you are using the MIKROE proto board for the WM8731 you need to swap out the 12.288MHZ crystal for a 12MHz crystal or you will not be able to align the frequency across all of HF.? This hint alone would have saved me weeks of fruitless debugging.

73,
Dean
KK4DAS

Re: sBITX with FreeDV

#110269

Excellent! That is very good to hear.?

Re: sBITX with FreeDV

#110268

This is on my todo list. There are sufficient hooks to make this work in modems.c.

- f

Show quoted text

On Sun, Mar 31, 2024, 9:05 PM Jon / W2JON <sigmazgfx@...> wrote:

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: sBITX Toolbox - A great companion for the sBitx transceiver is now available for public release #file-notice #sBitx #sbitx_v2 #sBITX_v3 #wiki-notice

#110267

On Fri, Mar 29, 2024 at 12:21 PM, Charudatt Uplap wrote:

I'm homebrewing the sBITX and building only the Exciter board at the present.?
?

Although I have a provision for the ATTiny chip on board I don't plan to use it or bypass it.?

?

For the Si5351, I wanted an easy way to calibrate or set the exact clock frequency

Charudatt,

The software runs fine without the SWR/PWR bridge, ATTiny chip or the RTC clock module installed.? No changes required,

The frequency calibration is a one-time thing and not worth putting into code.? Inject a known 10MHz frequency into the receiver and zero beat to see how farr off the calibration is.? Then make small changes is SI5451V2.c to this line and retest:

int xtal_freq_calibrated =?25000000; // tcxo

BIG HINT - per my other posts on this topic - if you are using the MIKROE proto board for the WM8731 you need to swap out the 12.288MHZ crystal for a 12MHz crystal or you will not be able to align the frequency across all of HF.? This hint alone would have saved me weeks of fruitless debugging.

73,
Dean
KK4DAS

sBITX with FreeDV

#110266

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

#110265

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

Re: After Bookworm 64 bit upgrade, the DSI monitor flickers #Raspberry4B #sBITX_v3

#110264

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 .?

Show quoted text

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

#110263

John,

Will this mod work with a Bitx 40?

Thanks and 73's, Phil? KC2YLM

Re: Waterfall width

#110262

Ashhar, thanks for the gentle correction on the IF frequency.

Gordon KX4Z

Show quoted text

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

On Sun, Mar 31, 2024, 10:16 AM Raj vu2zap <rajendrakumargg@...> wrote:

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

On Sun, Mar 31, 2024, 8:11 AM Gordon Gibby KX4Z <docvacuumtubes@...> wrote:

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?

On Mar 30, 2024, at 22:14, Jack, W8TEE via <jjpurdum=[email protected]> 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

Re: SSB transmission

#110261

开云体育

DigiKey has them for a little over $3 each. ?

I have used several of them with uBITX transceivers. ?All good results. ?

Bob

WB8BEL

Sent from Bob’s iPhone

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?