Hi!,
Better news!. I discovered that my input path had reversed polarity. I corrected this, and noise figures improved a lot. :Fully ccw: -105dbfs, 1/4 turn : -100dbfs, 1/2 turn: -71,88 dbfs, 3/4 turn: -55,85 dbfs, fully cw: -36,76dbfs. With the c5 mic attached.
So, it was a phase problem... And in all mic preamps the last quarter turn is the noisiest, in this case, exacerbated by the high self noise of the akg c5. I hope to be in the right track...
Jay x
Better news!. I discovered that my input path had reversed polarity. I corrected this, and noise figures improved a lot. :Fully ccw: -105dbfs, 1/4 turn : -100dbfs, 1/2 turn: -71,88 dbfs, 3/4 turn: -55,85 dbfs, fully cw: -36,76dbfs. With the c5 mic attached.
So, it was a phase problem... And in all mic preamps the last quarter turn is the noisiest, in this case, exacerbated by the high self noise of the akg c5. I hope to be in the right track...
Jay x