This is headphone/line preamplifier with very low distortion even with no GNFB used.
https://www.diyaudio.com/community/threads/gainwire-line-phone-non-gnfb-preamp.395695/#post-7265671
https://www.diyaudio.com/community/threads/gainwire-line-phone-non-gnfb-preamp.395695/#post-7265671
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Stll have spare bords dimension 250x120 mm. All the aditional components are transformer 30 to 50 VA 2x15 Vac and input selector.
This preamp use no global negative feedback and the volume control is between the gain block and output buffer, and that gives better signal to noise ratio.
This preamp use no global negative feedback and the volume control is between the gain block and output buffer, and that gives better signal to noise ratio.
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