Following previous posts I've replaced all e-caps on PS, Prot, Head, AF and all transistors and E-caps on Main amp board along with new trim pots. Turned it on without load or dummy resistors through DBT and took measurements. Bias is within -0.030mv on both sides and I do not have enough trim pot adjustment to go positive. DC offset is able to set 0. Turned it on without DBT and Bias starts climbing to over -0.060mv as unit warms up and keep climbing so I turned it off.
Few questions:
How critical is for Bias to be on positive vs. negative mv in my case?
Does Bias climb indicate a problem or because of no load at speaker terminals?
Is it a good idea to attempt Bias and DC adjustment with dummy 10 ohm resistors?
Thanks
Few questions:
How critical is for Bias to be on positive vs. negative mv in my case?
Does Bias climb indicate a problem or because of no load at speaker terminals?
Is it a good idea to attempt Bias and DC adjustment with dummy 10 ohm resistors?
Thanks