FallenAngel
Headphoneus Supremus
Hey guys, so I'm biasing my Dynahi here and I notice a little trend - I bias to 0.75V across output resistors, wait for amp to heat up for 15 minutes, see the bias go up, turn it down, wait another 15 minutes until it goes up again, turn it down again... and so on. It's been running on my desk for over an hour at this rate and I just about maxed out the trimpots. When is "enough"? Should I be expecting that eventually this would not happen? I'm thinking that the amp warmed up enough that the transistors are running at a certain temperature and self-bias but if I turn them down too much, they'll never even reach 0.75V.
EDIT: I have 500R resistors across the 10K trimpots now, but those are being chopped and I'm sticking 1K in there instead for even more adjustment.
EDIT: I have 500R resistors across the 10K trimpots now, but those are being chopped and I'm sticking 1K in there instead for even more adjustment.