开云体育

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

Got back to town and plugged in the uBitxr4 and found the audio distorted. Poking around the finals I found that the two diodes D15 and D16 gave only a drop of 1.2V total but the final transistors

Many, many thanks for ur comments, Andy. Now I understand that either a cheap speaker or bypassing built-in amp is the solution of the synchronized noise issue. Since this fix isn’t hard one for me,

in the message #52671?solution a problem: "gentlemen, the question is closed. I connected the cheapest computer speakers with a built-in amplifier and sent a signal to them bypassing the amplifier

I want to say that?synchronized noise?is a problem with an audio amplifier ?v4. tonight I will try to make a video where the built-in audio amplifier is turned off, and the sound goes through an

Very much appreciated, Andy. I’d like to compare its before/after. What do u mean by “no problem of audio”? Do u mean to say the synchronized noise is the spec of uBITX? // hiro, JJ1FXF

Hiro if necessary, I can shoot the video with an external (bypassing the built-in) audio amplifier. but believe me, there is no problem with audio.

Do all of the v4 have this distortion issue? Or only for the certain lots? Thanks, Andy. Ur videos helped me to understand what the distortion issue is like. // hiro, JJ1FXF 2018/06/29 14:47、Andy V.

I have ?v4. big problems with sound. if you bypass the built-in audio amplifier, then you can use it. for example, a video from my uBitx v4 https://www.youtube.com/watch?v=mBi5NGL0bK0

IC. I’ll pay my attention to this distorted audio issue for a while. Any other known hardware problems on uBITX r4, the latest board? Many thanks, MVS. // hiro 2018/06/29 13:35、Mvs Sarma

There are few members who reported the good functioning of Audio amplifier. we need to check whether the element is wrong in design or some pieces went out with distorted output. Regards MVS Sarma

Installed raduino v1.27.1 and it works fine. No RF noise burst on transmit. Great piece of software Allard.? Now looking to do more hacks of the hardware to take full advantage of the software

Jack, Thanks for ur quick reply. I read some articles of mods, but couldn’t recognize which are necessary mods for uBITX r4 board. Does the r4 board still need to be fixed for the distortion issue?

http://www.contextengineering.com/

Most of the mods that have been made are summarized at: ubitx.net Jack, W8TEE

Hi, all. I’m really new to uBITX and planning to place my order to hfsignals.com very soon. Then please share its known hardware issues of uBITX r4 that I need to modify or solder. Thanks in advance

All: Several people have asked about compiler warnings they are getting, like: ????????warning: ISO C++ forbids converting a string constant to 'char*' A variation on this are the "deprecated"