Re: Nouveau 75 Distorted Audio


nm0s_qrp <ai9e_qrp@...>
 

This rig uses a TA7642 IC for the AM detector and AGC.  It combines many functions in a three-pin package.  It is also known for its distinctive audio characteristic, as builders of the Murania can attest.  The audio quality is somewhat determined by bias levels.  Much of the harshness of the audio can be rolled off in the speaker driver bu adding some additional capacitance to C12, in the 0.001 to 0.01u range.

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