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Alex, I had the problem in reverse where the clicks where very noticeable with the factory nano as mounted on the Raduino.? After? I changed the nano for a cheap eBay one, the clicks went away (as

Hi Sarma, Thanks for your answer, any help is welcome, and I'm sure I will finally find out what's happening. It's also the fun of building your own rig, hey? Please note, I am not using the

I am planning on it. See you there, God willing and the creeks don't rise...

Greedy governments.

Thank you very much! I learned something from that. Do you have any idea what is the minimum insertion loss?

Alex, I now understand that you had used co-ax cables to connect the clocks to main board. if the raduno is farhans original, why not try direct connection once with no cables. Secondly, I suppose

Hi all, I have replaced the Nano in my homebrew rig as one of the IO ports was dead. Now, with the new Nano, same firmware, same rig, I have a lot of tuning clicks.? When I disconnect the SI5351 the

David - Thank you for pointing out that the top of the volume pot and wiper wires are reversed in the wireup diagram. I will try taking the audio from there. Dexter - Yes, I have passed a ham exam.

You are right Allard, The pot would have smoked! Pot smoking has happened before here.. M0clscarl, please replace your 10T pot and wire it right there sill be no problem. Raj

So you have a 10-turn pot? Then it should indeed be wired as shown here: https://github.com/amunters/bitx40/blob/master/Vishay%20100K%2C%2010-turn%20pot%20wire%20up.jpg On the purple wire (slider)

Davis, you are absolutely right! According to this diagram the wires are interchanged.. the yellow should be pot TOP and ORANGE is pot middle. That explains the crappy sound at low volumes.. never

And when fully clockwise what do you read? If not near 5 volts, then trace that lug back to the source. If you do find 5 volts and the center (wiper) pin is still zero then replace that control. Any

I also noticed that the wiring for my tuning pot is different to the online wiring guide. The tuning pot is a bourns (blue) pot so obviously different to the guide, and this did work before so I

I want to suggest a circuit that I have tested to regulate the power in my previous self-built HF transmitter. It is based on an HSMP3816 QUAD PIN DIODE. I enclose the circuit file 73

I had exactly the same issue with my BitX40. Perhaps the supplied relays are poor quality. I replaced the relay by: brand: ZETTLER type:

Raj / Richie That's odd, the orange wire on my Ubitx is the input to the audio amp, the wire colours and positions on the socket is the same as in the wire-up but the orange wire definitely goes to

For anybody trying to get their uBITX to work in Tx mode. Something to check perhaps. Mine was working then started to become intermittent. Key the Mic PTT switch and the display shows it's in Tx

Ok I measured voltage and getting 0.9v from fully anti clockwise to fully clockwise. There is continuity from the center pin to ground...? Raduino V1.01 is what flashes up momentarily when turning

Thank you very much That is a very nice schematic drawing and readable Thank you,? I cant wait to get the parts and build it. 73, W9KJO, Walter

?Gentlemen. You are wonderful! Ubitx is alive. Low amps on PTT was mis wired Baofeng Mic. Followed another thread and croc clipped the cw connector and grounded it for dit. Got 1.53A!!! Still to