So Mark and I are having the exact same no receive problem. I've reprogrammed my nano thinking maybe something was amiss but that didn't help. Mark replaced his 5351 board including the nano with a known good part and now his works. Is there any way to replacement for these boards? ?There's no way I can replace the smd 5351 chip which I believe to be the culprit. ? Brian

Brian,

I'm going to replace the 25mHz crystal on the SI5351 board and see if that's the culprit. ?If so, I'll let you know. ?I had to order 5 of them so if it works I'll send you one to try.

Mark W5MCU

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I just designed an had PCBs made for tiny (.6x.8") 5351 board.? It has 2 four pin connectors for power and I2C and then

output on the other side.??? I now have 40 oscillator modules?? I only built one, worked the first time.

?

So, you would be SURPRISED on soldering in that little fellow.

Flux and some small solder braid and it went in like a breeze?? You need small tipped iorn and tweezers.

Some of the pins shorted, but you wipe the braid while heating outwardly.

Actually the tiny crystal was a bigger problem.? You have to put VIA holes so you? can solder from the reverse side.

Taking of the 5351 just use braid and iron tip.? Clean it up nice with braid and then alcohol for the replacement?

Brian,

I reuploaded the Sketch to the BITx40 Radiuno board and replaced the 25mHz crystal and still no workie. ?So that one is going into the junk bin.

Wished I could have helped. ?You might contact Farhan and see if you can purchase just the Si5351/Raduino board. ?Let me know if he'll sell just that and I'll purchase one also.

Mark W5MCU