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Re: uBITX Scratch Build Volume Issue #ubitx-help #ubitx #homebrew #v5

 

Hi Indra,

i also build a ubitx by scratch. My solution you can see in the circut diagramm. The audio preamp has a gain of 40 dB as lowpass with cutoff near 3kHz. I also had problems with motorboating of the audio PA. The solution is decoupling the 12V DC with 4,7 ohm and 10000 uF. See below in the circut diagramm. It works very well without distortion and overload. See MAX9314!!! I hope it helps.

73 de DF1EA, Chris!
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