(tr)uSDX Forum

Hi Richard,

Double check you are entering the correct serial when you go to download the firmware. Send us a photo of the serial you are showing on the screen.

I would suggest no, given the already packed memory of the Atmega 328P.

This is a very nice build indeed.

Robert, what inductance calcs were you using?

Personally, I have found that many of the calculators online are of no use for RF work.

I use:

https://owenduffy.net/calc/toroid3.htm

Any reason why the don't offer a case with the kit? Have you emailed them and asked them? This is a question that needs to be directed to a seller, or supplier. We cannot answer that question on behalf of a third-party. If I get the kit, where might I pick up a case. Any 3D-printing service availab...

Looks nice!

What do we know so far about turns on the toroids for these bands so far? What about cap values is there any definite answers to what should be used? I haven't seen anyone publish any data for inductor/capacitor values for the high-band board as yet. I have the theoretical values sitting here on my...

This is known, and a consequence of some form of electrical noise within the circuitry.

Good idea with using the FFT of e.g. Audacity. I am just moving all data and applications from that Laptop to a new machine though. Maybe i do it if the new PC is ready to use. I think i will just post the question to that other Q&A thread, then the author's can say: You are right or you are wr...

Reflash the firmware with no callsign entered in the download box.

Your connections to the ICSP header.

Never use the - F flag, if you were trying that too.

73 ! Thanks to everyone who participated in this device. I made it successfully (tr)uSDX and made several SOTA activations already.Works great ! But this OLED type is absolutely not readable on field operation .. not even in the shadows in my region. I made also devices with similar display. dmr-ho...

It is safe. It is a question of efficiency only (power out / power in).

I think this (tr)uSDX has a hardware problem ...???

Have you contacted the seller then?

Welcome, Keith. 1. DC power plug https://www.aliexpress.com/item/4001145471168.html?algo_exp_id=b367546f-c9d7-45bb-b394-868ea12ef9bf-18&pdp_ext_f=%7B%22sku_id%22%3A%2210000014888664130%22%7D&pdp_npi=1%40dis%7CAUD%7C%7C1.47%7C%7C%7C%7C%7C%400bb0623f16511870829584998ef094%7C10000014888664130%7...

Seems like you were expecting a Yaesu in a nice box with a thick manual for $100, rather than two PCBs and a bagful of components

PS: did you ever try to flash the bootloader via ICSP that was suggested to you on your other thread?

It is for this fear of mine in working on SMDs that I have chosen to take the 12 volts elsewhere, see photo.

Where have you tapped off the 12V to? I'm confused.

Congratulations to you, Luca66. Next week upon arriving home i will try to load firmware via ISP. Many thanks to Faraaz, VK4JJ for the identification of possible hardware failures in usb path. Luca, if you find something interesting let us know in this topic. Below, just for curiosity its the print...

Documentation is a work in progress - please be patient. For now, the manual pages and youtube videos on DL2MANs account are what we have. As for the CQ message, it is intuitive. Play around with it, click the encoder, press the buttons. I'm sure you will work it out in under thirty seconds. As for ...

I'll check the components. It will take a very powerful magnifying glass. I do not hide that I do not feel comfortable working on SMD components, but I will try. One thing is for sure, the problem lies after the ch340. https://www.ebay.com.au/itm/174830517628 I bought this device (before my microsc...

(mines not a *Rxxxx* and I have tried published Values from Manuels Schematics, and varied many things [worse is easy!] but have not gotten to 80% or > yet, on 20, but plan to!) Mine is similar. It is impossible to get good efficiency on 20M (not *Rxxxx* kit) - currently running around 65% efficien...

Hallelujah. I don't like having a beta firmware Doesn't look like you have many other options ;) Don't worry about it being a beta version - it is stable. I have only ever used the beta versions. Check R20, R28, R29, R30 - ensure they are soldered correctly on the pads and not open circuit. Check C4...

heinrich wrote: ↑26 Apr 2022, 10:36 It returns the signature of the mcu:
Detected 1e950f = ATmega328P

Connections are find. Try reducing your baud rate.