I have assembled this preamp(link below) with the intention of capacitor-less coupling. One of the channels is having -6mV and the other shows -16mVdc approx. The complementary matching of these BD139-16 n BD140-16 from the twenty each I purchased was impossible and I want the offset to be as low as possible. Is there any changes in resistors/or addition of preset I can incorporate so that I can trim the offset.
http://www.diyaudio.com/forums/pass-labs/91617-low-distortion-high-dynamic-range-pre-amp.html
Help needed
Gajanan Phadte
http://www.diyaudio.com/forums/pass-labs/91617-low-distortion-high-dynamic-range-pre-amp.html
Help needed
Gajanan Phadte
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