Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels #ubitx #ubitx-help

Mike
 

Some more testing results:
I attached an external high quality Hi-Fi type NAD linear audio amplifier via an electrolytic capacitor (for DC blocking). On that NAD amp. the audio is no longer distorted. I have a feeling that the final amp of uBitx V4 has a flaw in it.....

As far as I know, this is the most common way of biasing a push pull amplifier to avoid crossover distortion: https://www.electronics-tutorials.ws/amplifier/amp110.gif
To me it looks like there is a problem in the final amp ...

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