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Can you hear static or at least an increase in background noise
as you plug the antenna in?

Perhaps bring a wire from the antenna connector over near the 25mhz
crystal of the Si5351 on the Raduino, see if you can tune that in.

Could be as simple as a bad BNC antenna connector.? In the distant past,
some of the supplied BNC connectors were machined incorrectly, and did not
reliably make contact.? Use an ohmmeter to verify that the antenna wire is connected
all the way into the main board of the uBitx.? And while you are at it, make sure the
antenna wire is not shorted to ground.

Here's an old Video of Farhan using one or two meters of wire (connected to nothing)
as an antenna to inject local QRM into the various stages of a Bitx40,
this same trick should work on the uBitx as well.


If your issue is an issue with menu settings or needing a to go through some?
calibration sequence, I defer to others here more familiar with current firmware.

Jerry, KE7ER?


If there's a nearby AM broadcast station down around 1mhz,
try tuning that in.? Or whatever else might be especially loud in your area.

Can you hear a nearby AM broadcast station when you tune down around 1MHZ

On Sat, Nov 14, 2020 at 04:58 PM, Patrick Peter Rosney wrote:

I uploaded V5 Firmware but this has made no difference

Patrick,
The v5 firmware uses a different SSB filter frequency.? That software will not work with a v4 board.? Here is a link to the KD8CEC software that has both the v4 and v5 board software.?


You want to use the uBITXV234 folder selecting the file that matches your display.? If it is the stock v4 1602 display then the file is?UBITX_CEC_V1.200_16P.hex.?The hex files are loaded into the Nano with Xloader.

If you want to go back to the stock v4 software, here is the link:


I would suggest the KD8CEC software, as that has more features and options for CW operation that the stock does not.

Once you have the correct software I would then start the troubleshooting as Jerry suggested.

Have fun with the rig.
73
Evan
AC9TU

OK Jerry , Thanks for your reply . I think my problem is the wrong software / firmware is on the Chip and it isnt compatible with the Version 4.3 Board .

Have learned a lot in the last 24 hours ....but it sure is a lot od trial and error !

Thanks?
Patrick?
Ei 2if?

Hi Evan , Thanks for Your Reply .? Yes , I seem to have uploaded the? wrong? firmware onto the Arduino Nano . I did origionally try the KD8CEC Software but the links?
? ? ? ? ? ? ? ?on his site didnt work for me . Spent a lot of time today and? ran into computer problems . Discovered that XLoader downloads? wont open on 1 Laptop?
Downloaded it onto a different laptop and cant put files onto the XLoader Box .... My Head was wrecked with all these problems? but I am 80% there tonight !

May even go back to the origional v4.3 firmware !??

Thanks Again for replying to my query and for sending me the links to the various bits of software ....all very helpful , Evan ..
Know a lot more tonight than I did last night !?
Thanks Again , Evan?
Kind Regards?
Patrick?
Ei2if?

Patrick,
If you cannot work out the Xloader issues, then you can download the source code from the same link as the hex files.? It is a different zip file.

If you go that route, then you will need to go into the ubitx.h tab and be sure to set the?
#define UBITX_BOARD_VERSION 5? ? ? ? ? ?//v1 ~ v4 : 4, v5:?

to a 4, and select the correct display in the following lines.? Then compile and load.?

Since you have loaded a program to the Nano before, I assume that what you have works with the Raduino Nano.

I believe that the Xloader download has security issues in that it is not registered.? That means you need to allow it to download and then run.? I kind of remember the concern I had with bypassing the Windows security feature.

Feel free to post with specifics of your error messages if you need more help.? It is always best to do so in this same thread so that others can follow and learn.? If you would rather do so out of the groups.io then private message me if you wish.

73
Evan
AC9TU

Patrick,
I am very happy that you were able to get your uBITX working.? The knowledge of helping someone really makes my day.

Have fun and feel free to post any questions that may come up.

Enjoy the uBITX!
73
Evan
AC9TU