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Don, I too am hearing the audio in the speaker during transmission. I noticed it first when transmitting digital using FT8, in fact at times the transmitter went into ocillations with the feedback. I

Elmar, Tell us what is the problem. Raj

You should not set the current limit to a lower limit than what the device needs. Probably what is going on is that when you have the current set for 1.5 amps and the rig really needs say 2 amps , the

Hello, my arduino board is defect. how i can buy a new one..? I would be very thankful for any help. with Kind regards elmar—dl2qa@...

WONDERFUL!! This is the mod I certainly will do at first after setting up my ubitx. Again, many thanks, Andy. // hiro, JJ1FXF 2018/06/29 22:45、hirosmb JAZZ <hirosmb@...>のメール:

Andy, Tons of thanks to you. ARIGATO! // hiro, JJ1FXF 2018/06/29 22:38、Andy V. Borisenko via Groups.Io <rw9rn@...>のメール:

Hiro, special for you sound bypassing the built-in amplifier v.4 https://www.youtube.com/watch?v=PsB6_HeeToc&feature=youtu.be

Jack, Thanks for your comments. I am not complaining at all. I just wanted to know what mods I need to do to have better ubitx functionalities. I appreciate a lot for the engineers who designed this

Yesterday, I set up a separate antenna for the uBitX on my front porch, to test battery operations, potentially to use the rig in the field. The antenna I set up was not ideal, and my Elecraft T1 ATU

Don’t forget those emitter resistors, that Add additional voltage drop. Someone suggested using a bit of feedback, I didn’t look at the circuits, but wouldn’t that be one solution?

It seems there are still people who complain about the audio. Since most of the mods can be done post-construction, I'd put it together and judge for yourself. It's not an issue for me as the JackAl

Thanks Mark. I've usually try to use 14 AWG wire (or larger) for power feed and a nice big capacitor right after the power switch. In the BITXs I use an 8 volt pre-regulator to feed the Raduino.

Mike: Thanks for the link. Great job! 73, Alan N4AYE

we will probably have to increase the emitter resistors in that case too. The other option would be to use slightly higher bias voltage rectifiers like the 1N4001s. - f wrote:

Farhan, It was too much! Q72 started to get hot but not Q73. Means they are not matched. Iq went up almost 100mA. So I used a pot where 47 Ohms seems fine. What may work that instead of these diodes

What if we use three diodes instead?

Oms Kindly share us the RX & TX reports of uBitx set ,Operated on original boards? i am expecting on the original boards results. de vu3pen sridhar

Jack, I’m taking this idea for which thank you. What about the noise level which other radios or PCs places around the uBITX receive? // hiro, JJ1FXF 2018/06/29 14:58、Andy V. Borisenko via

Yes, you are right, Raj. I’ll set up the uBITX as it comes at first. My only concern was if I need to solder or mod at my first setting-up bcoz v4 is rather new design, I’ll easily get confused

Hiro, First connect up the board and get it working in stock condition and when all is well and running look for mods that you may want to try. I have posted the audio distortion fix just now. Its