(tr)uSDX Forum

Latest Beta has a power and modulation indicator built in.
https://dl2man.de/wp-content/uploads/20 ... /beta.html

73 Manuel; DL2MAN

I´ve changed your username as requested.
Password etc unchanged.
I hope everything works well. Please test it.

73 manuel, DL2MAN

So you bought kits, not built rigs, right ? And after you assembled them, you realized the PA did not work, and assumed it was destroyed by the customs scanners ? And you complain about custom fees for importing stuff into the EU from China ? Hmmm...... First of all: Custom fees are by law of your c...

This is a typical curve when your NanoVNA is not calibrated right (SOLT for the correct QRG range). Once you deviate from the calibrated range, steps, output power, cables and adapters used etc., the calibration can turn invalid and you see something like this...... In Germany we say "Wer misst...

First of all: it´s (tr)uSDX, not (tr)uSDR. How come, people are getting that wrong ? Second: Install Bootloader via ISP first and set fuses again then: Install Firmware via USB and you should be good to go. And No, once you change the chip, you´ll get a new serial number, as it´s hard coded in the c...

What kind of DC input do I have to use on (tr)uSDX? can I use a generic 12 volt laptop power supply (or any other generic power supply below 14 volts given the header fits) or does it have to be a regulated power supply? A clear NO ! Use a clean Power Supply, rated for radio applications. If you do...

I was hoping to find a definitive answer to the recommended max power we should run for digi modes. There is no definitive answer as there is no hard lines. It depends on the efficiency of your individual rig, and the SWR of your individual antenna, stability of your power supply, common mode curre...

Hi Jay,

Your Serial is in the System now, and you can proceed with downloading firmware.

Hope to meet you on the Bands.

73 Manuel; DL2MAN

Since it is a new Processor, that was never registered through official Supplier or group buy organizer, you can´t download firmware for it. We have to register your serial in the system first. So either post Serial here, or write us an e-mail with your serial as requested in the screenshot ;) 73 Ma...

Arduino AS ISP ?
Or a deticated ISP Programmer ?

Reset the rig by pressing and holding rotary encoder shaft while inserting power cable or USB.
If it works after that, you need to resore your settings like frequency calibration, RShunt Setting, Band Setup etc.

73 Manuel; DL2MAN

You left out the most important info: What did you use as ISP programmer ? How did you prepare it ? How did you connect it (especially 5V) ? It is clearly a programming issue. And once the bootloader is on there, you no longer need ISP. Everything from there is being done by USB. This is why we chos...

Hello. Thank you Manuel. Now I understand what I have to do with the hardware of the nano vna but I still could not find out which exact mode I have to use. I tested it in every mode that my nano vna offers but nothing looks similar to the graph that you showed in your video. I made pictures. 73 Lu...

Please try to get some external measurement. Ask a friend if he can help.
Most likely you have either a cold solderjoint around T1/T2 and/or one or more BS170s are damaged.

73 Manuel; DL2MAN

We work according GIGO rules: Garbage In, Garbage Out.
The information you gave are not enough to provide any reasonalble suggestion.
Please give some more details, what you have tried, under which circumstances it happens etc....

73 Manuel; DL2MAN

Double and Triple check your solderings around T1 and T2. If there´s a bad solder joint because you did not burn/scratch away enough of the enamel around those wires, this might be the reason. In any case: Please post high resolution Pics of T1/T2 . There migth also be something wrong with winding d...

Generally speaking: 1. The ATMega328, that does not work, has yet to be found. So all those type A vs B are a theoretical problems, not relevant in practice. 2. You´re issue sounds like a programmer issue. Either you didn´t get the ISP Pins right, or forget to power up the rig. 3. You should never c...

So starting with a working device that had scratchy sound, (which could be anything from corrupted bootloader over bad mic to such a simple thing as being off frequency, because you did not calibrate or even more simple: nearfield noise from adcs), you decided to rape firmware by installing somethin...

Lukas, Please read forum rules:
https://forum.dl2man.de/viewtopic.php?t=132

Forum Language is ENGLISH. No Exeptions. This is, so everyone in our Team can understand what´s going on.

Regarding your question:
Don´t worry, Sunny is 100% trustworthy.

73 Manuel; DL2MAN

Hello Razvan, Chris (DL6SEZ) did the right thing in a very polite way. He closed your thread as it was (and still is) in violation with the forum rules. As the guy, who pays for this here, and who is the origin of uSDX and (tr)uSDX Design, I feel entitled to define the rules. The rules are publicly ...

(...) My problem is the (tr)uSDX dramatically changes the displayed power and efficiency values for no good reason! For unknown reasons, the display changes to a different set of numbers (~40% lower than reality for both power and efficiency).(...) Then please check soldering of components involved...

There´s plenty info here, how to "calibrate" RShunt.
For example:
https://forum.dl2man.de/viewtopic.php?p ... hunt#p3667

73 Manuel; DL2MAN

dl6sez wrote: ↑07 Aug 2023, 17:25 Hello Manuel,

Farnell has, without 50$ free shipping as Mouser wants as a minimum, the possibility to get the FDT86256 FETs for a standard postage price from Germany, but they only want "companies"....

73 de Chris

Good to know, thanks.

73 Manuel; DL2MAN

Hi Vincent, Those are not well documented, new experimental features. It´s supposed to indicate the Audio Input. Problem with speech is: Things happen very dynamic and fast, so you´ll see 999 very often. YOu don´t need to worry in this case. It´s just an indicator, you can increase distance to mic o...