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sorry, no. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

Thanks Vince, that's often on nano clones, do you have any current consumption data on your side ? (with details (genuine firmware, v3 or v4) 73 - Remi

Yay! K1 was indeed bad, I now have a working receiver and transmitter, however the output power is only 500mw compared to the 12 watts before. Do we think the IRF510's are shot? What would be the best

Thanks Vince, mine is totally unlabeled on the top. Unusual. Thanks Remi. Please keep us posted. 73, Don

It's the CH340. Vince - K8ZW. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

Thanks Don your description is fine, i understand what have been made do you know what serial board is under the nano ? (FT232, PL2303, CH340 ?) (with the new mount it's probably more easy to see than

It seems to be a problem with my raduino board (or nano but as it's soldered, its hard to test further), i'm going to ask for warranty to get raduino replacment, does someone know how i can ask that ?

Well after testing some voltages on the board, the RX rail is present everywhere it's supposed to be but the TX rail is missing everywhere. I'm thinking I may have toasted K1 but still checking. Joel

A good reminder to install a 0.5 Amp fuse or polyswitch plus a series diode (1n4007 perhaps) from power supply into the main 12v power rail of the uBitx or Bitx40 board. Would likely have avoided all

I put my own Nano socket on mine. Will measure but I've heard the Display is the culprit. Lots of current. Looking forward to V4 videos on YouTube showing various things, like pop or not, cw opp, and

Remi, Will do when I get some time. Meanwhile, the Nano is inverted, the USB connector on the display side. The headers pins on the Nano are on the USB connector side of the board. That maintains the

Don, Ohmmeter is not signifiant (which seems normal): 165K on 2M, 20K on 200Kohms, 2.59K on 20K, 640ohms on 2K, The 7805 output is 4.79V Don could you send me a pic to see how the nano socket is

No, looks like TX to one of the many ground connections on the kit board. Quite solid, thus the smoked trace. There is something else going on, too. Probably minor. -Don

Possible, I don't really know what would happen if both sides of a bidi amp were turned on. But his burnt trace probably saw amps, and not obvious to me how the bidi amps could pull that kind of

Remi, this is the new V4 board and I am pleased to report that the Nano is now socketed . Without removing anything soldered, with the display still not connected, I measure 1,590 ohms from the +5

Oh, one more thing Jerry, The mods I had done was the cutting of the traces per the instructions on Don ND6T's site. I bridged them back to factory and checked with a MM to make sure the path was

Don, Jerry, thank you for trials and excanges, unpluging the display (after power off Of course) i got still 210mA? don i assume you have ashan genuine firmware, do you have v3 or v4 board (i’ve

Thanks for all the great replies, I'm really embarrassed to admit I did this. Jerry, you are right about what caused this. It didn't work at all when I tried it the first time, after looking at

I repeated the test using my highly accurate Harbor Freight meter.? ;-) Not the needle on my old linear power supply. My figures now agree with Don's measurements to within a couple ma. ? Voltage

Joel, Since it did not go poof until you activated the PTT, then it might have been an incomplete cut of the TX trace. With both TX and RX voltages active then both sets of IF amps will be active