Re: sBITX V2 serial # 001 Current Status and question
#sbitx_v2
Neil, Is this power output reading from your radio's display or is it from an external power meter? Can you remind us if you have a v2 or the de? - f
On Mon, Jun 19, 2023, 7:13 AM stone_ridge_road < AB7Echo@...> wrote:
I would strongly urge that you do your tests into a good dummy load
with known good connectors ... ideally with no cable ... before you
do anything significant inside the rig.? And make sure you verify
the power out with a decent external power meter instead of just
relying on the internal readout.
When troubleshooting you want to simplify as much as possible at
each step.
73,
Dave?? AB7E
On 6/18/2023 5:30 PM, Neil Goldstein
wrote:
Sorry to reply to my own post, but I was hoping someone could
advise me.
Is there something I should be doing (see below) or should I be
happy with these numbers?
Thanks!
--Neil, W2NDG
Hi all,?
After resolving my update woes (thanks Art N2AJO !!) I feel
things are pretty stable.
I know that the rig should be capable of upwards of 40 Watts
on the lower bands. I'm not seeing that at 100% drive.
Here is what I'm seeing, which I'm happy with, but would like
to know if I need to tweak anything or look for a problem:
(Into a fairly resonant antenna on most bands but tuned to
close to 1:1)
BAND? ? ? ? ? WATTS
80? ? ? ? ? ? ? ? ?15
40? ? ? ? ? ? ? ? ?18
30? ? ? ? ? ? ? ? ?20
20? ? ? ? ? ? ? ? ?21
17? ? ? ? ? ? ? ? ?12
15? ? ? ? ? ? ? ? ?12
12? ? ? ? ? ? ? ? ?10
10? ? ? ? ? ? ? ? ?11
I would say accuracy is + or - 2 Watts with this setup.
Sorry, I have misplaced my dummy load.
Anyway, is there anything I should be doing or looking at.?
Otherwise, I'm enjoying the rig.
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All,
I had the same issue with my DE sbitx.? I had to reload the image on the microSD card, do the update, and then reboot.? After that, the mic worked again.
Before I did the above, I checked that QD1 was operating with about 0.6 volts between the emitter and base.? I then verified that I got an audio signal on my oscilloscope on the collector when providing sound into the mic.? Both tests confirmed that the mic preamp was working.
That was the 3rd time I had to reload the image and redo the software.? I had a fourth just the other day after I had not reset the current limit on my bench supply which caused a low power input to the sbitx.? If, after an unexpected or unclean shutdown, there is a significant chance that the microSD card has been corrupted.
The above are my experiences.? Others may be different.
73
Evan
AC9TU
73
Evan
AC9TU
|
Re: sBITX V2 serial # 001 Current Status and question
#sbitx_v2
I would strongly urge that you do your tests into a good dummy load
with known good connectors ... ideally with no cable ... before you
do anything significant inside the rig.? And make sure you verify
the power out with a decent external power meter instead of just
relying on the internal readout.
When troubleshooting you want to simplify as much as possible at
each step.
73,
Dave?? AB7E
On 6/18/2023 5:30 PM, Neil Goldstein
wrote:
toggle quoted message
Show quoted text
Sorry to reply to my own post, but I was hoping someone could
advise me.
Is there something I should be doing (see below) or should I be
happy with these numbers?
Thanks!
--Neil, W2NDG
Hi all,?
After resolving my update woes (thanks Art N2AJO !!) I feel
things are pretty stable.
I know that the rig should be capable of upwards of 40 Watts
on the lower bands. I'm not seeing that at 100% drive.
Here is what I'm seeing, which I'm happy with, but would like
to know if I need to tweak anything or look for a problem:
(Into a fairly resonant antenna on most bands but tuned to
close to 1:1)
BAND? ? ? ? ? WATTS
80? ? ? ? ? ? ? ? ?15
40? ? ? ? ? ? ? ? ?18
30? ? ? ? ? ? ? ? ?20
20? ? ? ? ? ? ? ? ?21
17? ? ? ? ? ? ? ? ?12
15? ? ? ? ? ? ? ? ?12
12? ? ? ? ? ? ? ? ?10
10? ? ? ? ? ? ? ? ?11
I would say accuracy is + or - 2 Watts with this setup.
Sorry, I have misplaced my dummy load.
Anyway, is there anything I should be doing or looking at.?
Otherwise, I'm enjoying the rig.
|
Re: sBitx DE (and also V2) notes and hints
Thanks Evan. I finally got around to doing that calibration. The number I settled on was 24999450. There doesn't seem to be any audible change unless the number is stepped up or down by more than 100. That gets me to within about 10Hz.
Jack, N6LN
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Re: sBITX V2 serial # 001 Current Status and question
#sbitx_v2
Sorry to reply to my own post, but I was hoping someone could advise me.
Is there something I should be doing (see below) or should I be happy with these numbers?
Thanks!
--Neil, W2NDG
Hi all,?
After resolving my update woes (thanks Art N2AJO !!) I feel things are pretty stable.
I know that the rig should be capable of upwards of 40 Watts on the lower bands. I'm not seeing that at 100% drive.
Here is what I'm seeing, which I'm happy with, but would like to know if I need to tweak anything or look for a problem:
(Into a fairly resonant antenna on most bands but tuned to close to 1:1)
BAND? ? ? ? ? WATTS
80? ? ? ? ? ? ? ? ?15
40? ? ? ? ? ? ? ? ?18
30? ? ? ? ? ? ? ? ?20
20? ? ? ? ? ? ? ? ?21
17? ? ? ? ? ? ? ? ?12
15? ? ? ? ? ? ? ? ?12
12? ? ? ? ? ? ? ? ?10
10? ? ? ? ? ? ? ? ?11
I would say accuracy is + or - 2 Watts with this setup.
Sorry, I have misplaced my dummy load.
Anyway, is there anything I should be doing or looking at.? Otherwise, I'm enjoying the rig.
|
Re: sBitx Issue After Upgrade
#sBitx
John, This update is for both editions, DE as well as V2.? When I had pushed out the update, there was a problem noted in coming back to receive from transmit. I fixed that too, I recommend pulling in these changes to everyone. - f
On Mon, Jun 19, 2023, 4:58 AM John Terrell, N6LN < N6LN@...> wrote: Hi Ashhar, let me ask, just to be clear, the latest ./update is for the V2, which has no physical LPF relays. It seems to be working on my V2. What about the DE (which has upgrade #2, and the T/R board)? Is the V2 software with the latest update appropriate for the DE?
Thanks,
Jack, N6LN
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Re: sBitx Issue After Upgrade
#sBitx
Hi Ashhar, let me ask, just to be clear, the latest ./update is for the V2, which has no physical LPF relays. It seems to be working on my V2. What about the DE (which has upgrade #2, and the T/R board)? Is the V2 software with the latest update appropriate for the DE?
Thanks,
Jack, N6LN
|
mine is the same..Minimal rf output on SSB with normal output on cw and 2 tone.. on cw and 2Tone about 22 watts on 17 meters and 2.1 watts at best on SSB.. software issue most likely..
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Re: #sbitx_v2 Further to loose clamping screws on P.A MosFETs
#sbitx_v2
Unfortunately I just experienced what you all have been talking about. One of my inserts came loose (V2 #89). My quick solution was to put back the stud but secure it from behind with a M3 30 mm screw and a nut at the outside back of the heat sink. It's not elegant and it took some difficult fin grinding with a Dremel, but it works. If the other insert comes out I'll try drilling and tapping for a 3 mm screw. My tapping set is only for SAE--time to get another metric set.
So far the heat sink seems to work. Some of my PA MOSFET failures may have been from overheating but every time I've replaced them the clamp was on tight--it only came loose when tightening the last replacements. I now also add heat conducting grease on both sides of the mica insulator--that may have been the weak spot.
By the way a recent failure occurred just during the PA_BIAS potentiometer adjustment and I know the bias voltage was below 4 volts--and one of the finals shorted after only about 1 second so it couldn't have been from thermal stress. These IRFZ24Ns from Mouser. Perhaps it is a bad batch.
Jack, N6LN
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Joerg?
That would make sense, but so far you and I seem to be the only ones having this exact issue. Mine is the latest software (updated Friday) and software would affect everyone using that version. I see that there is maybe a common emitter transistor amplifier that takes the mic output before it gets to the audio codec chip. If I could get a clue on how ?to check it that would help.?
The way I have the ssb configured is with the mic gain set at the recommended level. I have tried other levels with the same result.?
73 Reed AA1RB
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Where is the signal s-meter display on the sBitx v2, I can only see a waterfall? thank you.
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How can I tell what version of firmware my radio is using?
Thanks
Wd8axa?
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Re: v2 hardware changes from model shipped on 4-17-23 and birdies on receive
Well, there was the change to the location of the threaded inserts for the PA transistor heatsink, correct?
73,
Dave? AB7E
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On 6/17/2023 6:15 AM, Ashhar Farhan wrote:
There are no hardware changes at all to any sbitx v2.
- f
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I have the same problem: power OK on CW and two-tone mode but nothing with the MIC although the input to the WM8731 looks OK.
So my conclusion is, that it must be somehow software/ configuration related.?
--
73, Joerg - DB2OO
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Re: v2 hardware changes from model shipped on 4-17-23 and birdies on receive
Have tried different power supplies and lipo batteries with same results?? reflashed firmware? have rf chocks on power line as well¡.will check ground points inside case is next step ? Sent from for Windows ?
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From: Ashhar FarhanSent: Saturday, June 17, 2023 9:15 AM To: [email protected]Subject: Re: [BITX20] v2 hardware changes from model shipped on 4-17-23 and birdies on receive ? The sbitx does have spurs but they are all well below the band noise (when the antenna is connected). If you have spurs, you might want to check with a different power supply. There are no hardware changes at all to any sbitx v2. ? hello
I got a v2 model from a ham that was bought on 4-17-23 built..I am curious if any hardware changes were done to the v2 for the hamvention release..Mine seems to have a lot of birdies in the receiver across all bands regardless of different antennas tried..did the swr bridge calibration and rf calibration..any ideas or suggestions?
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Re: v2 hardware changes from model shipped on 4-17-23 and birdies on receive
The sbitx does have spurs but they are all well below the band noise (when the antenna is connected). If you have spurs, you might want to check with a different power supply. There are no hardware changes at all to any sbitx v2. - f
hello
I got a v2 model from a ham that was bought on 4-17-23 built..I am curious if any hardware changes were done to the v2 for the hamvention release..Mine seems to have a lot of birdies in the receiver across all bands regardless of different antennas tried..did the swr bridge calibration and rf calibration..any ideas or suggestions?
|
v2 hardware changes from model shipped on 4-17-23 and birdies on receive
hello
I got a v2 model from a ham that was bought on 4-17-23 built..I am curious if any hardware changes were done to the v2 for the hamvention release..Mine seems to have a lot of birdies in the receiver across all bands regardless of different antennas tried..did the swr bridge calibration and rf calibration..any ideas or suggestions?
|
Re: QSSTV sound card configuration and other Digital software
#sbitx_v2
Thank you Rafael,
As I'm not so familiar with Pi software. I don't know what to do with the commands form the Github Link?
If it is just to copy and past to the Pi command prompt, It OK.
Other why I will need help? :( Sorry
Regards,
Nir 4X1FK
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Re: QSSTV sound card configuration and other Digital software
#sbitx_v2
And, comment the line in sbitx source that calls fldigi, or just close it.
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On 6/17/23 13:12, Rafael Diniz wrote: Try with this asoundrc (/home/pi/.asoundrc)
Use the "default" device at 48000 of samplerate.
And also, try to close and open the software if it fails first time. Sometimes the loopback gets stuck.
Rafael
On 6/17/23 04:43, Nir wrote:
I'm Trying to configure an Digital software like Qsstv or WXJT, (After closing the FLdigi that start automatic with the Sbitx).
I configured the sound In/Out the same as In FLdigi, But no audio came In or Out.
Any Idea?
Thank you
Nir? 4X1FK.
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John Terrell, N6LN
Neil Goldstein
