Hi
I noticed on my sbitx that at 5w to a dummy load with a couple calls on CW, the finals mosfets became incredibly hot. Poor heat transfer to the heatsink. Couldn’t touch them. I removed the board and replaced the insulation micas with some thicker ones, put some heatsink compound on the mosfets and micas and reassembled the radio. Have tested with more power and for a longer period of time. My finals are much much more cold and believe much more reliable.
73?
Jo?o, ct1dgh
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Re: Replacement Nano problem uBitx V6
Does that mean if I installed the latest IDE, I would use the "new bootloader" where as the old nanos use "old bootloader" ?
73 Ken
On Sun, Sep 18, 2022 at 12:33 PM Gary Anderson < gary.ag5tx@...> wrote: Hi Ken,
The UNO uses the optiboot bootloader and so do the newer Nanos.? So you can load a Nano (with the optiboot) as an UNO.
However, the UNO and Nano have different Analog pins.? i.e. you won't be able to use A7 on your Nano if you are using the UNO board file.
As the IDEs have progressed, the libraries have increased in size.? This has pushed it over the edge for some programs.
There is more space available when you load as a Uno than as a Nano.? When updating the Nanos to the optiboot bootloader, Arduino didn't get the fuse settings correct to take advantage of the smaller bootloader. (e.g. more available program space).
Rgds,
Gary?
Rgds,
Gary
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Re: Replacement Nano problem uBitx V6
Thanks, Mark.
I should have mentioned probably that I'm using Arduino IDE. ?
This info is good to know.
Howard
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Re: Replacement Nano problem uBitx V6
I can confirm that the latest Nano clones ordered off Amazon are not only programmed wtth optiboot (the "new boot loader option on the Arduino IDE) and that they have a resized the flash allocation (optiboot is smaller)? giving you more programing memory (important if you are a KD8CEC hack).
You can tell if hour nano has the "expanded" memory or not by looking at the end of the sketch after a build. If it says 30720 instead of 32256 (same as the Uno), you might have one of the nano clones with optiboot but no resizing of the flash partition.? (BTW: There ar youtube videos on how you can fix this and get the "extra free memory". Like:?https://www.youtube.com/watch?v=-MynHAz7TsI&t=95s&ab_channel=DesignBuildDestroy
The main impact you will see if you just upload ".hex" files is that you need to set the right baud speed on xloader. new bootloader likes 115200 and the old one likes 57600. Get this wrong and it will not work...
73
Mark
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Re: Replacement Nano problem uBitx V6
Interesting. ?I tried uploading to the Nano with the Uno setting and it uploaded fine. ?It acted the same as before in the radio, though.
Howard
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Re: Replacement Nano problem uBitx V6
Hi Ken,
The UNO uses the optiboot bootloader and so do the newer Nanos.? So you can load a Nano (with the optiboot) as an UNO.
However, the UNO and Nano have different Analog pins.? i.e. you won't be able to use A7 on your Nano if you are using the UNO board file.
As the IDEs have progressed, the libraries have increased in size.? This has pushed it over the edge for some programs.
There is more space available when you load as a Uno than as a Nano.? When updating the Nanos to the optiboot bootloader, Arduino didn't get the fuse settings correct to take advantage of the smaller bootloader. (e.g. more available program space).
Rgds,
Gary?
Rgds,
Gary
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I have made a breakthrough with iambic paddle CW operation. You can test code via:
cd /home/pi
git clone
cd sbitx-k3ng
git pull
git checkout 2022.09.15
./build sbitx
./sbitx
Feedback welcome. I still sense hesitation at higher speeds, but I think it’s much better than before.
73
Goody
K3NG
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Re: Replacement Nano problem uBitx V6
I just tried again using nano and 1.8.4 and it didn't upload Blink. Switched to UNO and it uploaded with no errors.
73 Ken VA3ABN
On Sun, Sep 18, 2022 at 10:04 AM K4LXY < k4lxy.cw@...> wrote: Interesting.? I'm using 1.8.13
Howard
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Att,
yes you can. You will need to scroll down a little. It is located in the section where you set up the CW auto keyer. ? Setting it there also sets it on the screen on the right below that grid thing. (Or at least there on my 5”, I assuming that the 2.8 has room for it?)
73
Mark
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Re: Replacement Nano problem uBitx V6
Interesting. ?I'm using 1.8.13
Howard
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Re: Replacement Nano problem uBitx V6
and to add, when I was getting the averdude?errors, I installed 1.8.19 and I also had the same problem. I eventually?uninstalled the IDE and reinstalled 1.8.4
73
Ken VA3ABN
Hi Howard I had a similar problem with newly purchased nanos, or at least I think it's similar. I was using 1.8.4 previously with no problems on a set of new nanos. Yesterday I received new nanos and the Blink sketch would not upload. They are clones and the driver showed CH340. No matter what I did, the blink sketch would not upload, kept getting?
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x19
I did some googling and read to try using a different board other than nano. I used Uno and everything uploaded to the nanos with no errors. Maybe you can try this.
73
Ken VA3ABN
Evan
I have the N8ME loaded on the original Nano and all works fine.? I've had several firmware versions on that Nano and all went well.
With the new Nanos, the software won't load using Old Bootloader but it does if I use the newer one. Since everything complies and uploads OK with the "new Nano," and works OK with the original Nano, it's hard to see what would be wrong with the IDE setup - but ?I'm open to suggestions.
The fact that I get exactly the same results with two of the new Nano's I purchased suggests to me that it isn't something in my soldering of the pints (and they look fine on close examination).
A mystery.? Thanks for your suggestions.
&3, Howard
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Re: Replacement Nano problem uBitx V6
Hi Howard I had a similar problem with newly purchased nanos, or at least I think it's similar. I was using 1.8.4 previously with no problems on a set of new nanos. Yesterday I received new nanos and the Blink sketch would not upload. They are clones and the driver showed CH340. No matter what I did, the blink sketch would not upload, kept getting?
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x19
I did some googling and read to try using a different board other than nano. I used Uno and everything uploaded to the nanos with no errors. Maybe you can try this.
73
Ken VA3ABN
Evan
I have the N8ME loaded on the original Nano and all works fine.? I've had several firmware versions on that Nano and all went well.
With the new Nanos, the software won't load using Old Bootloader but it does if I use the newer one. Since everything complies and uploads OK with the "new Nano," and works OK with the original Nano, it's hard to see what would be wrong with the IDE setup - but ?I'm open to suggestions.
The fact that I get exactly the same results with two of the new Nano's I purchased suggests to me that it isn't something in my soldering of the pints (and they look fine on close examination).
A mystery.? Thanks for your suggestions.
&3, Howard
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Re: Replacement Nano problem uBitx V6
Evan
I have the N8ME loaded on the original Nano and all works fine. ?I've had several firmware versions on that Nano and all went well.
With the new Nanos, the software won't load using Old Bootloader but it does if I use the newer one. Since everything complies and uploads OK with the "new Nano," and works OK with the original Nano, it's hard to see what would be wrong with the IDE setup - but ?I'm open to suggestions.
The fact that I get exactly the same results with two of the new Nano's I purchased suggests to me that it isn't something in my soldering of the pints (and they look fine on close examination).
A mystery. ?Thanks for your suggestions.
&3, Howard
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Re: Audio Amp Wi-Fi Interference
#sBitx
Usb wigi produce no interference
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Re: Audio Amp Wi-Fi Interference
#sBitx
A wireless mouse/keyboard will be elegant!
On 18/09/2022 6:38 PM, WP3DN wrote:
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Re: Audio Amp Wi-Fi Interference
#sBitx
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Hi Mark, thanks for the tests,? have resolved the cw wpm problem using the second method with the encoder and saved the changes.. Th e cfg menu also now reflects the same changes and saves accordingly.. Have yet to try the mic ptt and see if the Tx button reacts,
I have not as yet tried the tx !!? must now calibrate the system,, Can I use the uBITX manager to install my callsign on the screen??
best regards
Art G3XNE
toggle quoted message
Show quoted text
Art,
Sounds like that location in EEPROM is corrupted. BTW: that 1200 number is a very interesting number.... In the uBITX Memory? manager, you actually enter a value (i think its the length of dits?) and that number is divided *INTO" 1200...? Might be a coincidence...
I you have not downloaded it, I would recommend downloading the current uBITX Memory Manager. It is hard to fine (misslabeled on Dr Lee's github), but you can get it here
Fire that up, attach it to the com port for your radio, connect, open and read.? ?There is a CW section where you can fix that number. Then select "write to ubitx", close and you are done.
Happy to help here. Remember when i was a teaching assistent some 50 years ago and thought I knew everything until the students asked questions.... :-)
73
Mark
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Re: Replacement Nano problem uBitx V6
On Sat, Sep 17, 2022, at 05:56 PM, K4LXY wrote:
The original software loads and looks ok (including frequency) but the screen isn't responsive. ?Reinstalling N8ME after that got the same response as before.
Howard
Do you have the original Nano that came with the v6 uBitx, and is it still the original firmware without any attempts to load a different software?? If so, try that Nano and verify that the Raduino and v6 are still working. I suspect that you do not have the Arduino IDE setup correctly.? I do not remember having to change the processor from the ATmega328 (Old Bootloader) that I have used for my development efforts.? Check your tools settings in the Arduino IDE. The other possibility is a potential Arduino library issue. 73 Evan AC9TU
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Hello, I have a few questions. I received my sbitx kit and installed the screen and a PI 3b. Since I could not get a PI 4. Once installed the display ribbon on the PI end hits the pins of the lm380n chip on the digital board. I also noticed that there is inductor L5 mounted on the back side of the digital board. L5 touches the PI just behind the audio connector. When my sbitx was up and running randomly the receive audio would go crazy. The waterfall was all red. I removed the PI from the digital board and noticed dimples in the ribbon cable. I bent the cable to solve the problem but I did not know bending the blue part of the cable would brake the traces. New cable on order. Do I need to shield the cable from the audio chip legs? And L5 sits directly on top of the PI audi0 components, it looks to be touching the PI. Is there a reason that L5 is mounted on the back side of the board? Any suggestions you have would be greatly appreciated. Thank you in advance
73 KC7GRH ? Sent from for Windows ?
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Re: #sBitx Incorrect frequency display
#sBitx
(1)MODE:CW \addcwpitch ON
IC-705 ?TX on 7.030.00
sBitx ? ? RX on 7.030.70 ? (up 700Hz)? -->Spectrum and frequency displays are misaligned?
-------------------------------------
IC-705 ?RX on 7.030.00
sBitx ? ? TX ?on 7.030.00
==========================
(2)MODE:CWR \addcwpitch ON IC-705 ?TX on 7.030.00 sBitx ? ? RX on 7.030.70 ? (up 700Hz) ------------------------------------- IC-705 ?RX on 7.030.00 sBitx ? ? TX ?on 7.030.00 ========================== \addcwpitch OFF IC-705 TX on 7.030.00 sBitx ?RX on 7.030.00 ?--->Spectrum and frequency displays are misaligned? ------------------------------ IC-705 RX on 7.029.30 ?(down 700Hz) sBitx ?TX on 7.030.00 
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Raj vu2zap
Butch