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Re: V4 64bit firmware

 

Aaron, your last bullet point is "Raspberry Pi imager starts to burn the file" ... that can take a while, did it finish successfully?
Re: V4 64bit firmware

 

Thanks to all of you in this thread for your help. I just somehow managed to update my sBITX to the V4 64-bit firmware without a hitch.
Re: uBITX V6 CPU upgrade #v6 #ubitxv6 #uBITX_V6 #ubitx-v6

 

Hi, you can view this post: /g/BITX20/topics#msg95052
I still have a couple of PCBs available.
Ramon
Re: Sbitx v3 headless case

 

Just thinking out loud here, and not really answering your query, but ...

I kind of like the form of the Hardrock 50+ amp. You spec'd no display, but would it hurt to have a little OLED display tell you radio health and status? I haven't looked for it but it seems a little display might be in the baseline already.

Of course, I'd have headphone / key / and mic inputs on the front, keep the antenna on the back. Maybe keep the sbitx power connector the same? Where do you want the ethernet connector and USB ports?

No volume / tuning control at all? I know headless is what you want, but it would be good to be able to make a CW contact without a computer attachment.
--
Mike KB2ML

Hardrock-50.webp

Re: sBITX 64Bit Pi Image Available #sBitx

 

开云体育

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- start sBitx
- choose “web” function
- in sBitx-web start “CMD” (terminal)
- there type txcal and confirm with enter and wait til the calibration-process is finished
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Be sure Yopu have set CW and power to 100 before and have a 50 ohms dummyload connected
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73/76 Jens – HB9JOI
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+++
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?

From: Bob Brown
Sent: Wednesday, October 23, 2024 6:34 PM
To: BITX20@groups.io
Subject: Re: [BITX20] sBITX 64Bit Pi Image Available #sBitx
?
How do you enter /txcal ?? When I try, it sends it as cw
Re: sBITX 64Bit Pi Image Available #sBitx

 

How do you enter /txcal ?? When I try, it sends it as cw
Re: White screen on powerup #ubitxv6 #uBITX_V6 #ubitx-v6 #ubitxv6-help

 

and also here:
Re: White screen on powerup #ubitxv6 #uBITX_V6 #ubitx-v6 #ubitxv6-help

 

Hello world,
Just went through above problems today (I have bought some messed ubitx with Nextion display and wanted it back to original state).
I have found this post earlier, but not found solution in it, so decided update...
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New ILI9341 2.8" 320x240 TFT display needs J1 jumper to be shorted with tin drop to operate with Raduino of ubitx v6.
Without the short it will not work - there will be white screen.
Don't worry the screen will not be destroyed if connected without the shorted jumper.
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Issue is related with SPI levels of arduino and display.
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You can read more here:
and here:
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Regards
Tomasz
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Sbitx v3 headless case

 

Does anyone have a design for a sbitx case without a display?? I have no need or want a display, I will use a monitor and keyboard.? Or I'll use headless with my ipad.

Post any pics or designs you have.

Thanks,

W4WHL
Re: sBITX 64Bit Pi Image Available #sBitx

 

Pretty great system. Lots to learn and lots to love! Thank you guys for all of your hard work
--
'72
Aaron?
Re: sBITX 64Bit Pi Image Available #sBitx

 

On Sun, Oct 20, 2024 at 08:15 PM, JJ - W9JES wrote:
band level IF/Drive usability
Wow! I'm really enjoying this new feature. I haven't tried the others yet but I'm sure they are great. Thanks JJ and team.
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Joel
N6ALT
Re: Update if you are using QRO #sBitx

 

Jeff,
yes it is now working as expected.
I deleted 12, in config.txt, then Ctrl-O <Enter> and finally Ctrl-X <Enter> to exit. After restarting, the indicator LED did not light up, only when I turned on the QRO and pressed the TUNE button, there was an EXT-PTT short circuit output.
--
Gyula HA3HZ
Re: uBitX fading receive sensitivity #ubitx6-help

 

You are right about K3 Evan
Missed that out as I was writing the answer around 23:30.
Regards
Lawrence


On Mon, Oct 21, 2024 at 12:01?AM Evan Hand via <elhandjr=gmail.com@groups.io> wrote:
On Sun, Oct 20, 2024, at 04:27 PM, Lawrence Galea wrote:

If on a particulat band or bands using the same TX LPF then the respective LPF relay is suspect.

?

If on all bands it could be the transmit/receive relay K3

K3 switches the LPFs out of the receive path, so it is unlikely that any of the LPF circuits are the issue.??
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As Scotty R. suggested, I would look for a possible heat issue.? This could be in any receiver circuit, including the BiDi amps.? It could also be related to the Si5351 drifting, causing an out-of-alignment issue.
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It would help to know if the background noise reduces when the fading occurs.? That could point to the LM386 or Q70 as the most likely culprits.
?
73
Evan
AC9TU?
Re: sBITX 64Bit Pi Image Available #sBitx

 

Release Announcement:
?
We are excited to announce the release of software version 4.1 for the sBitx HF amateur radio transceiver! This release represents a major step forward, with numerous improvements to band stacking, calibration, and band level IF/Drive usability.
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A special thank you goes out to the incredible 64-bit sBitx development team: JJ - W9JES, Jon - W2JON, Alan - N1QM, Lars OZ7BX, and Jeff - KF7YDU . Your hard work, dedication, and tireless efforts have made this release possible. Your passion for innovation continues to shape the future of amateur radio, and we are immensely grateful for your contributions.
?
Version 4.1 introduces new features and enhancements, including automatic save/recall of IF level and Power level for each band, a graphical bandstack position indicator (disabled by default), and a band scale adjustment to aid in fine tuning power levels with the V3 Powercal app. There were some other, small UI improvements as well.
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Please see the release notes at ?for more information.
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To get this new update, please visit our wiki article ?
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?

Sincerely,
The 64 bit sBitx Development Team
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Update if you are using QRO #sBitx

 

Gyula recently uncovered an issue when using the QRO option. ?A few of you have purchased my QRO boards and will want to do a quick easy fix. ?It turns out that there is a configuration setting which will turn your QRO on during bootup even without keying. ?That could cause your amp to go into TX mode before the sbitx software is started. ?This is an easy fix, but one that you will need to do on your own.? JJ? will make the change in the next image. ?Until then, if you are using the QRO option, either make sure your amp is disconnected from the QRO until the sbitx software starts, or do the following:
?
Open a terminal and type:
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sudo nano /boot/firmware/config.txt
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Scroll down until you see the section labeled [All]. ?Look for the 12 in that line and delete it. Just the number 12 and nothing else. Seen highlighted in this image.
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Then type Ctrl-x. ?Then y to save changes, and enter to save to the same filename.
Then reboot the radio and you'll be good to go.
Re: Sbitx band decoder

 

No band decoder planned by our team..?
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?
-JJ
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Re: uBitX fading receive sensitivity #ubitx6-help

 

On Sun, Oct 20, 2024, at 04:27 PM, Lawrence Galea wrote:

If on a particulat band or bands using the same TX LPF then the respective LPF relay is suspect.

?

If on all bands it could be the transmit/receive relay K3

K3 switches the LPFs out of the receive path, so it is unlikely that any of the LPF circuits are the issue.??
?
As Scotty R. suggested, I would look for a possible heat issue.? This could be in any receiver circuit, including the BiDi amps.? It could also be related to the Si5351 drifting, causing an out-of-alignment issue.
?
It would help to know if the background noise reduces when the fading occurs.? That could point to the LM386 or Q70 as the most likely culprits.
?
73
Evan
AC9TU?
Re: uBitX fading receive sensitivity #ubitx6-help

 

First of all is this happening on all frequencies or on particular band or bands?


If on a particulat band or bands using the same TX LPF then the respective LPF relay is suspect.

?

If on all bands it could be the transmit/receive relay K3

?

Before trying to change any relays put a dummy load on the output socket so that if you accidentally key the transmitter it will not blow the finals.

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Then identify the low pass filter (L1 to L4, C200 to C204) on top of the PCB edge left hand side near the front looking from the front.

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Attach a piece of wire and check whether you can receive some signals and whether the problem goes away. If you cannot receive signal the noise floor difference will indicate whether there is a change ir not. If there is no change in the signal or noise level then the problem is with one or more of the relays.

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If so the problem most certainly will be one of the LPF filter or TR relays.

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Be careful not to attach a big antenna or transmit with another transmitter as the wire will be connected to Q90 base. The same applies if you accisentally transmit because while the transmitter will be seeing a dummy load, the wire will pick up enough energy to blow Q90.If you want to be safe remove C80 while testing to isolate Q90 base which will also prevent the the transmitter from transmitting any RF.

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I have not yet tried this out but I was thinking of putting a 10 Kilo ohms resistor from the 12 volt direct supply to the antenna connector or to contact 12 of K3 which is the same with a 100nf capacitor at the 12 volt end of the resistor. This would put a wetting current of 1.2 milliamps at 12 Volts through the relays contacts.


On transmit the circuit would be through contacts 12 and 10 of K3, the contacts of the respective relay of the TX LPF in use, and through the output winding 5 and 2 of T11.

?

On receive, the circuit would be through contacts 12 and 14 of K3 and contacts 12 and 14 of K1 through the LPF (L1 to L4, C200 to C204) through winding 1 and 6 of T2.

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This should solve the poor relay contacts problem which is a known problem of relays on receive.


There are also the contacts M2 wich may also need addressing but would need a couple more components.


(Wetting current is the minimum electric current needing to flow through a contact to break through the surface film resistance of a contact)

The relay tapping method as said by?someone else will also give you an indication whether one of the relays is playing up.


On Sun, Oct 20, 2024 at 9:42?PM Scotty R via <Theroadcalls1=gmail.com@groups.io> wrote:

Also, as a past RadioShack repair technician,? I would like to suggest a can of freeze spray and a TINY heat torch to assist with troubleshooting poor connections and heat related failures. Many times you can change temperature in an area and the problem comes and goes, simplifying the process.


On Sun, Oct 20, 2024, 12:44 PM barry halterman via <kthreebo=gmail.com@groups.io> wrote:
I had a similar experience, but the problem was not with the radio. It was a poor solder joint at the antenna.
Once I would transmit the problem would go away then start to fade until I would key the transmitter. I could run a few watts of power to have it clear up. Drove me nuts for a while.
?
Barry
K3BO
Sbitx band decoder

 

Hi guys!!
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Have any of you have a band decoder to the sbitx?? Any ideas?
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Im doing a project and the amplifier uses3 lines for the lpf control. Before changing the software I would like to know if there are other options.
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Thanks, Juan
Re: uBitX fading receive sensitivity #ubitx6-help

 

Also, as a past RadioShack repair technician,? I would like to suggest a can of freeze spray and a TINY heat torch to assist with troubleshooting poor connections and heat related failures. Many times you can change temperature in an area and the problem comes and goes, simplifying the process.


On Sun, Oct 20, 2024, 12:44 PM barry halterman via <kthreebo=gmail.com@groups.io> wrote:
I had a similar experience, but the problem was not with the radio. It was a poor solder joint at the antenna.
Once I would transmit the problem would go away then start to fade until I would key the transmitter. I could run a few watts of power to have it clear up. Drove me nuts for a while.
?
Barry
K3BO
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