This is my take on the well-known Elektor PreConsonant phono stage. It has been fully built and tested; in fact, I am using it as my main phono stage at the moment. I have finally got around to correcting small silkscreen errors on the PCB, and now I feel comfortable sharing it with the community.
This is what an assembled PCB looks like:
Thanks to @vsmusic for inspiration, it was his post about the PreConsonant over at Lenco Heaven that started my addiction to DIY phono stages, and I even learned how to use KiCAD to make my own PCBs.
I also designed a very simple discrete voltage regulator to go with it. It probably does not perform as well as common 3-pin regulator ICs, but I wanted to use a 24V AC wall-wart that has very poor load regulation. Its no-load voltage is almost 30V, which after rectification exceeds the maximum input voltage of something like 7924 or LM317. In use I cannot detect any PSU-related hum even with my ear right against the speaker.
Gerbers, BOM and build notes are available here: https://github.com/SpinningVinyl/PreConsonant2021
Gerbers and BOM for the PSU: https://github.com/SpinningVinyl/PreConsonantPSU
This is what an assembled PCB looks like:
Thanks to @vsmusic for inspiration, it was his post about the PreConsonant over at Lenco Heaven that started my addiction to DIY phono stages, and I even learned how to use KiCAD to make my own PCBs.
I also designed a very simple discrete voltage regulator to go with it. It probably does not perform as well as common 3-pin regulator ICs, but I wanted to use a 24V AC wall-wart that has very poor load regulation. Its no-load voltage is almost 30V, which after rectification exceeds the maximum input voltage of something like 7924 or LM317. In use I cannot detect any PSU-related hum even with my ear right against the speaker.
Gerbers, BOM and build notes are available here: https://github.com/SpinningVinyl/PreConsonant2021
Gerbers and BOM for the PSU: https://github.com/SpinningVinyl/PreConsonantPSU