/repairs/ Recent content in Repairs and Modifications on Decades of Musings on HiFi Hugo en Mon, 12 Oct 2026 00:00:00 +0000 /repairs/convergent-audio-jl2/ Mon, 12 Oct 2026 00:00:00 +0000 /repairs/convergent-audio-jl2/ A Convergent Audio Technologies JL-2 amplifier with dead output tubes, failed cathode resistors, a need to re-bias and hum: new tubes, automatic bias and a safe earth lifter.