At txcal, the output stage is adjusted per band, which is protected by ALC.
It protects when the hardware is fine. Something happened with the hardware here.
The FETs have become shorted or something similar. Check that the FETs are OK.
Check that the screw holding the FETs to the heatsink is in place.

I would check those first
--
Gyula HA3HZ

I also made it to the booth yesterday and was pleased to meet Mr. Farhan and thank him for his work on these delightful radios.
Jack
N6LN

开云体育

I tried the manual’s recommended setting of 25 and there was basically nothing. Bumped up to 50 and there was some slight deflection. Checking the CW on the watt meter it looks like I’m getting max of 8-10 into a dummy load.?

Hi Farhan,

You may wish to consider using the 'Raspberry Pi 'SD card copier' next time to duplicate the image to a smaller SD Card see:
.
The SBITX card image can then written to any size SD Card - provided the contents fit.
When reinserted into the Pi in the SBITX, the partitions can then be resized to the full size of the card easily using the 'raspi-config' program

• sudo raspi-config from a terminal
• Choose Advanced Options (option 6)
• Expand File System (option A1).

Paul.

Yet another on sBITX

--
73
??? Bob? KD8CGH

Straight out of the box I hooked up to LiFePo battery and mag loop antenna. I can hear 20 m CW and sideband and get TX power out onCW but not seemingly on usb. I tried adjusting the drive and tried both the built in mic and the supplied mic, but no joy. Appreciate any suggestions.?

also is there a tutorial on how to navigate thru the screen?

Reed AA1RB

Farhan Describes the BITX23 -- His New 2 Meter SSB Transceive


Talking to Farhan -- May 16, 2023: High School DC RX, uBITX, Franklin Oscillator, Glue Sticks, More

--
73
??? Bob? KD8CGH

After a family emergency I made it to the Hamvention just long enough to unload mobility scooter meet up with Farhan and his wife?
Pick up my new sBITx radio?

Load up my scooter and head home to rest.??
I'm happy to say Farhan was looking great and the crowd around his booth was huge?
Pete KB8EMD

Success with a 64GB card. I can assert that the software definitely loads on a Pi 3B+.??

At the moment I only have the Pi and display and no other hardware. The radio interface doesn't come up, but I didn't actually expect it to.? I'm going to investigate modding my uBitx.? Ore may break down and buy the board only.

73,
Dean
KK4DAS

I have been checking for updates and doing the update build the recommended way from the original SD card I have (./update from inside sbitx folder).

pi@sbitx:~/sbitx $ ./update ?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Fri 19 May 2023 12:53:09 PM EDT
Already up to date.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Fri 19 May 2023 12:53:09 PM EDT
database is intact
compiling sbitx version v2.0 in /home/pi/sbitx
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
pi@sbitx:~/sbitx $

?

Congrats Salim.?

Do you have latest software build v2.1 from 11th May?

-P #5

Farhan,

So what is the power calibration procedure on a DE sBitx using this image file? There is no SWR bridge in mine or internal power meter, so whats the best way to calibrate.

Joel
N6ALT

I have been having a ton of QSOs on FT8 (and some on CW) !

#7 sBitx gives around 42W on 40m (after txcal) without any problems. Plenty of QSOs on all the bands from 80m and up (screenshot).

73 de vu2lid / n8li

Great?
Listening to the W8BI talkin there was a stalled auto blocking traffic
Once you get setup I will be back in today or tomorrow.
Save me a sBITx money is burning hole in my pocket.:)
I have a friend who is looking for the one without PI-4?
Take Care?
Pete KB8EMD

I spent 8 hours at the Dayton Hamvention yesterday?
several times looking for Farhan.
His booth is in building 5 #5304, but the space was empty.
He mentioned in another post that he would be there?
Wednesday and Thursday.
I have two people looking for him today at the Hamvention.
has anyone on this site heard from him?

Pete KB8EMD