DIY battery powered phono preamp. Audio schematic by Douglas Self (Elektor 05/2012) with a different opamp complement. All assembled point-to-point on a perfboard. Battery management circuit as in <a href="//commons.wikimedia.org/wiki/File:Battery-powered_preamp_-_power_management_(UVLO,_muting_delay).png" title="File:Battery-powered preamp - power management (UVLO, muting delay).png">File:Battery-powered preamp - power management (UVLO, muting delay).png</a>
<a href="//commons.wikimedia.org/w/index.php?title=User:Retired_electrician&amp;action=edit&amp;redlink=1" class="new" title="User:Retired electrician (page does not exist)">Retired electrician</a>
2021-12-21 11:35:12
<span class="int-own-work" lang="en">Own work</span>