Re: Farhan on SolderSmoke videos
Yet another on sBITX
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73
??? Bob? KD8CGH
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The BITX23 (VHF), the sBITX, and a 40 meter DC receiver
Farhan visited Northern Virginia on his way to FDIM.? In these videos we talk about the BITX 23, the sBITX, and the High School Direct Conversion Receiver.?
73? Bill? N2CQR?
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Re: No Sideband Tx but CW seems to work
#sbitx_v2
Reed, can you check the mic gain? There is as manual with the box. - f
On Fri, May 19, 2023, 11:09 PM john.bumgarner via <john.bumgarner= [email protected]> wrote: 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
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No Sideband Tx but CW seems to work
#sbitx_v2
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
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Farhan on SolderSmoke videos
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
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73
??? Bob? KD8CGH
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It was great meeting you Pete, however briefly. - f
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
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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
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Re: #sbitx disk image for software v2.1
#sBitx
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 
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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 $
?
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Congrats Salim.?
Do you have latest software build v2.1 from 11th May?
-P #5
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Re: #sbitx disk image for software v2.1
#sBitx
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
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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
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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
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Pete, Our crew was there but I was at FDIM. Now headed to the hamvention. Stuck in the long and winding traffic to Xenia...
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
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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
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Re: Death by calibration
#sBitx
Bob, 1. If you have a dummy load, attach it to the radio,? 2. On sbitx, scroll down to open the console, in the console command line, type "txcal", wait for it to cycle through it for? a minute or so 3. the rig should now be on full power. Remember, this works only on a dummy load. - f
Bob, Farhan and co.
I think it would be wise to add a thermal mechanical switch to
disconnect power from rig when
the heat sink become too hot. This is the only way to prevent these blow
outs.
or
Normally closed, 60 or 70C in series with power supply wire.
Raj
On 19/05/2023 3:47 PM, Bob Benedict, KD8CGH wrote:
> Farhan
> 1. Both, the sBITX and the external meter agree at about 22 watts
> 2. I tried to be clear that I abused the sBITX by repeatedly holding
> the key down while trying to record power and current against time. At
> first I periodically checked the heat sink but then got absorbed in
> the task. When it blew the heat sink was very hot - it was doing its job.
> 3. OK
>
> My question was about debugging now. With the new RF power transistors
> in and bias carefully readjusted I only see 22 watts out.
> --
> 73
> ??? Bob? KD8CGH
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Re: Death by calibration
#sBitx
Bob, Farhan and co.
I think it would be wise to add a thermal mechanical switch to disconnect power from rig when
the heat sink become too hot. This is the only way to prevent these blow outs.
or
Normally closed, 60 or 70C in series with power supply wire.
Raj
toggle quoted message
Show quoted text
On 19/05/2023 3:47 PM, Bob Benedict, KD8CGH wrote: Farhan
1. Both, the sBITX and the external meter agree at about 22 watts
2. I tried to be clear that I abused the sBITX by repeatedly holding the key down while trying to record power and current against time. At first I periodically checked the heat sink but then got absorbed in the task. When it blew the heat sink was very hot - it was doing its job.
3. OK
My question was about debugging now. With the new RF power transistors in and bias carefully readjusted I only see 22 watts out.
--
73
??? Bob? KD8CGH
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Re: Death by calibration
#sBitx
Farhan
1. Both, the sBITX and the external meter agree at about 22 watts
2. I tried to be clear that I abused the sBITX by repeatedly holding the key down while trying to record power and current against time. At first I periodically checked the heat sink but then got absorbed in the task. When it blew the heat sink was very hot - it was doing its job.
3. OK
My question was about debugging now. With the new RF power transistors in and bias carefully readjusted I only see 22 watts out.
--
73
??? Bob? KD8CGH
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Re: Spurious RF at beginning of CW transmission in the uBitx
I installed a 2N7000 as you suggested.
It has definitely got rid of the spurious RF on CW but I noticed that there is now some spurious RF at the beginning of transmission when on SSB.
Not as bad as it was on CW, but it is there on SSB.
I have left it installed as I think it is the lesser of two evils.
Thanks for the help.
Cheers
Deab
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Lou,
check with the dealers as they may have just received another RPi shipment.
I was able to purchase a spare today at a local dealer.
--
Gyula HA3HZ
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Bob Benedict, KD8CGH
Pete
Joel Caulkins/N6ALT
Raj vu2zap
HA3HZ