On Nov 11, 2022, at 1:41 AM, 尝é辞辫辞濒诲 VALLAURI <leopold.vallauri@...> wrote:

?Hi all,

Finally, I have finsihed to build my QDX.

RX works perfectly on 40m & 20m. I can see decoding frame in WSJT-X, no problem with RX, good!
Now TX
Symptoms: WSJT-X transmit one or two sec and switch back to RX.

Tests I did:
I have tested it with the serial console test tool and I am facing following issue:
- PTT test works
- Transmit test works with coax + dummy load.
- Transmit test DOES NOT work with coax (same as previous) + any of my antenna (Dip?le or EndFed DIY and JPC 12). Putty (console terminal) show me an error after one or two sec. QRP is still here but in a lost state where putty can't really interract with anymore.

I have verified my antennas and they are OK (I used them often in SOTA).

Any help is welcome. Thank you all.

尝é辞辫辞濒诲 F4IYY.

On Nov 11, 2022, at 1:35 PM, 尝é辞辫辞濒诲 VALLAURI <leopold.vallauri@...> wrote:

?Hi Willie, hi Allan,

First of all, thank you to both of you for taking time to answer me. I appreciate your support.

How did I tested my antenna, they are the one I use in SOTA with my FT 818, but that does not mean tested of course :)
I have a Nano VNA and ... they looks good,:50 Ohms & SWR < 1.5:1.? Unless you ask me to verifiy someting else?

About USB, I have a small ferrite on the USB cable on the computer side.

<20221111_175059.jpg>

Next step, test same setup with:
- a better USB lead, unless you tell me the one I already have is enaugh?
- a common chockes on coax, I have now to knock at some friend's door & see with them.

OK I will try thank you. I am in city center so I can't really often test so I will answer you in long time.

But thank you again for your help I appreciate it.

尝é辞辫辞濒诲