Nearly a month between surf reports! I must be slipping--or I've just been inordinately busy with the Day Job. I finally finished the pre-amplifier stage of Project Califone. Of course, I forgot how a comparator works, so that took some consternation and deductive reasoning to figure out (as well as a deep dive into The Learning Circuit). The sequences for the preamp segment of the video are shot and imported; I'm just slowly editing them and writing the supplemental content for publication as I go before jumping into the main amplifier circuit and finishing the project (at long last!).