12-02-2023, 04:47 AM
(11-28-2023, 06:06 PM)hifinet Wrote: Off topic, but from reading diyA posts on instability problems with Ali tube amps, incorrectly labeled output transformer leads seems to be very common. Usually the primary leads are reversed, which causes positive feedback and oscillation. Best to have a dummy load on first power up.
Was my first experience with any kind of tube gear, so did a lot of research before the build.
Initial power up was gradual with a Variac, dim-bulb tester and resistor dummy loads.
Once all seemed/measured good at full supply voltage, I next connected a set of sacrificial speakers.
