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Paul,? ? YOU ARE A GENIUS SIR!! That was it!? I looked under a mag glass and I saw one of the tension prong on the top of the connector pushed down.? After I moved it out of the way the USB

Take an existing raduino and disable the si5351. Bring the i2c lines off to an external si5351 board, like the adafruit. Put the buffers on that board. Get the display and nano away from the si5351.

I remember a relatively simple fix using a 45 MHz crystal across 2 points with a ground on the center wire. Has anyone done this? ?What were the connection points? ?Thanks. Steve. KE7GO

these micro usb could be retrieved from scrapped mobiles. these are sold sold across as replacement stuff.

Good effort Paul. Congarts. sarma vu3zmv

Tim, Look at the usb connector on the Nano. On mine one of the prongs was bent back and prevented the plug from fully seating. I used a dental pick and just worried the bent prong Long enuff till it

Farhan reports that his coil and cap have a null 10dB better than needed to meet regs, no need for higher Q. If the 90mhz trap can be done with a surface mount coil and cap on the back of the board,

I have no doubt Farhan solution might work but I guess that the Q of the 90Mhz and the null could be higher using a quarter wave open coax stub cut for the 90Mhz (likely a cap between 20 and 30pf in

Thanks Sarma, I tried as you suggested and still it is as no device is connected.? I think the connector must be bad.? This board will not show up at all under the device manager when two other

Farhan's 90mhz filter is clearly meant to take out the 2'd harmonic of the 45mhz IF signal. It's perhaps 90mhz and not the calculated 91mhz due to some capacitance in the node it connects to. May need

tim you don't have to i am as new. what you can do at device manager after connecting the suspect raduino of bitx40, refresh plug and play devices. after that , please check under ports any new port

I just saw the post where you state you have the CH340 installed...my bad. Jack, W8TEE

To me, it sounds like you don't have the correct device driver installed. I think you need the CH340 device driver installed. Go to this site: https://sparks.gogo.co.nz/ch340.html and follow the

You posted this on the 8th. I didn't get it until this morning - something's going on with groups.io as their emails are delayed anywhere from 1 to 5 days lately. Tim Gorman was complaining about the

Im not sure I am understanding.? I cannot load anything onto the bitx40 arduino as it does not even show up in the device manager.? The arduino program gives me an error to select a port but there

If device manage is recognizing ch340, you can try to load firmware if you had the procedure practiced once atleast. It might call for a calibration. why not try calibration with some known time

Yed, both working devices show ch340 in the device manager. Tim KF7VUT

This might be an opportunity for somebody to create yet another new Raduino Add buffer amps to all three clocks from the si5351 to help solve the spur problem. Choose a processor clock that won't beat

Tim, check whether both are using CH340g.

Thanks Vic for the reply.? Yes that is correct it power on with just a USB plugged in but the computer acts like it doesn't see anything (windows 10 and windows 7).? I have another Arduino board and