Topics

V3 uBitx Very Shrill Audio

Curt M.
 

Hi guys, I have my uBitx to the point that I could turn it on and do a smoke test. It powers up fine and the volume control and VFO works fine but the sound coming out of the speaker when people talk just about makes my ear drums bleed. 

I can tell that there are people talking and the audio is good and loud but it almost sounds like they are off frequency but not matter where I tune either abive or below do they ever come in clear. When I tune around I never hear anyone clear. I was under the impression that this was calibrated at the factory. Do I need to do some sort of calibration?  

I built this up in one of the amateurradiokits.in cases. It doesn’t seem like I have any sort of ground loop or anything. 

Curt

YO8UFO
 

Hey Curt! Can you tell us what antenna are you using for your test?

Curt M.
 

I found this information in a previous post. Is the Wire Up still wrong when it comes to the volume control?  This talks about swapping the yellow and the red.  On the current Wire Up it shows the red is not used. 



As you may have read that the volume control wires are incorrectly shown in the wireup diagram.

Please interchange the yellow and red on the volume control. This may solve the problem.
If it becomes worse then there is some other problem..

Curt M.
 

I’m using an end fed that I tuned up with an LDG tuner on my IC-7300 and then swapped to coax over to the uBitx. I wish I could upload a sample video to a You Tube but for some reason both my iPad and iPhone aren’t giving me that choice like it normally does. 

 

Yes, check BFO freq. 11.9965 or 11.9972 range. It comes set 11.995 I think..

Raj

At 21/09/2018, you wrote:
I was under the impression that this was calibrated at the factory. Do I need to do some sort of calibration?

Curt M.
 

Thank Raj, I'll have to look at that tonight.  Here is a link to a short video on You Tube if someone whats to hear what it sounds like make further comment.  I went to frequencies on 80 & 40 where I knew there were strong signals at least form one station in a QSO.  This is what I hear.

Curt

https://youtu.be/CjrrZERY8Iw 

ajparent1/KB1GMX <kb1gmx@...>
 

Curt M,

Have you dialed in the calibration specifically the BFO yet?

IF not that maybe your problem.

Allison

Curt M.
 

Hi Allison, no I have not.  I will look at that this evening.  It looks like it's a pretty simple process.

 

BFO is off!


At 21/09/2018, you wrote:
Thank Raj, I'll have to look at that tonight.  Here is a link to a short video on You Tube if someone whats to hear what it sounds like make further comment.  I went to frequencies on 80 & 40 where I knew there were strong signals at least form one station in a QSO.  This is what I hear.

Curt

https://youtu.be/CjrrZERY8Iw

Curt M.
 

Hi everyone. I’m up and running and the radio sounds good!

I went in and did a Set Calibration and then Set BFO and all is good. Boy you can really get this thing out of whack if you’re not careful!

I’ve already had my first QSO between my home QTH near Pittsburgh, PA and Winfield, MO, which is nearly 600 miles. The guy was running a net and said that he was impressed that I could make it that far today on nearly QRP power. 

Thanks for for your help. 

Curt

sdr freak
 

hello

i have comment to your youtube video yesterday and have a little bit same problem but i dont know what helps me to get success, what have you done and can you make a video on youtube how it sounds now when you say it works now good and you have even your first qso..?

have you swap wire up ? have you set bfo or calibration? what have you done to get success?

please help me i have 2 month this ubitx3 and get no qso till today. the AM radio station a can't hear clear and SSB voice i can't hear clearly so i can not speak with somebody bescause i don't hear the spoken SSB voice... i find now way but maybe you have an answer ?

Best Regards Fabian