Hi, my name is Lorenzo and I write from Italy.
This is my first message here, so nice to virtually meet you all!
I have a sBitx v3 board SN 0634, and while I'm 3D printing the case, I did some tests, after upgrading to v3.02.
It works perfectly in RX, in all modes I tested (SSB, CW and FT8) but when trying to transmit I got no output at all. The power meter reads 0W and SWR 1.0.
I tried it in FT8 and CW, and when switching to TX, the supply current rises from 400mA to 1.2A, but I have no power on the BNC connector. I tested with a tuner with built-in wattmeter, using my antenna and a 50W dummy load, no changes at all, regardless to the Drive setting.
The waveform display only shows a yellow straight line, without any modulation. As I'm an absolute beginner in the sBitx world, I don't know if I'm missing something. I checked the IRF510s and they seem fine. I also measured the voltage between Gate and Source while switching to TX, and it reads 4.33V, so I suppose the TX switching works fine. Any idea is greatly appreciated! Thanks!?
?73 de IU5RDU!
