08-12-2016, 11:42 PM
Thanks. I read all of page 1 (the first 50 posts), but not page 2.
Looking at the schematic, this amp is largely very conventional, but the biasing arrangements are a bit unusual. From a Google Image search, I see "Non Switching Amp" emblazoned across the front panel, and I guess that explains the complexity. Presumably it ensures that neither power transistor can turn off completely while the other one is supplying current to the load, but it's too late in the day for me to think too much more
But, it's perhaps not surprising it has some issues at power-up. There's always an exception to the rule!
Looking at the schematic, this amp is largely very conventional, but the biasing arrangements are a bit unusual. From a Google Image search, I see "Non Switching Amp" emblazoned across the front panel, and I guess that explains the complexity. Presumably it ensures that neither power transistor can turn off completely while the other one is supplying current to the load, but it's too late in the day for me to think too much more
But, it's perhaps not surprising it has some issues at power-up. There's always an exception to the rule!
