/builders/ Recent content in Builders' experiences on Decades of Musings on HiFi Hugo en Tue, 06 Oct 2026 00:00:00 +0000 /builders/martin-ruppel-phono-ii/ Tue, 06 Oct 2026 00:00:00 +0000 /builders/martin-ruppel-phono-ii/ A second phono stage built from a proposal Thorsten posted on the diyAudio forum, paired with a 6SN7 line stage that is also his design. Includes power supply prototype notes and tube substitutions for the line stage. /builders/carsten-rauth-rca-riaa-successor/ Tue, 06 Oct 2026 00:00:00 +0000 /builders/carsten-rauth-rca-riaa-successor/ A phono stage built on Thorsten’s cheap valve RIAA design, which he developed to avoid the problems of the classic RCA RIAA circuit: an ECC88 second stage, a semi-split RIAA network, and no cathode bypass capacitor in the first stage. Includes grounding and parts notes.