MM cartridge preamplifier - open project
Please feel free to download documentation of OPENAMP1, MM preamplifier open project.
Documentation files
can be found in the links below the photo of the assembled board
Assembly instructions and board manual
Openamp in the Modushop 1U case
Noise, Signal to noise ratio, Distortion
Please read my latest document on measuring MM phono amplifiers noise and SINAD. You will also find Openamp results there.
https://pmacura.cz/MMpre_measuring_methods.pdf
Output voltage swing
Max. output voltage swing is 30Vp-p with 2 x 17V power supply. This assures immunity vs. transient overvoltages at the input. Next measurement shows output voltage swing at 20kHz.
Pavel Macura 12/2012, last edited 03/2023