I have searched extensively to find the definitive answer but no luck
I am trying to check this amp before using or selling
The BIAS settings are elusive
As you can see from the pictures it has a Mike Creek 1995 main board (which says also used for A1 A2)
x2 capacitors 6800uf 35v
x4 wire wound resistors 0.22 ohm
Power transistors Motorola TIP2955 and 3055
The board runs at 33.5v dc
It works but sounds poor with one warm and one cool heatsink
BIAS is 4.5mv across x1 resistor for one channel and 1.5mv across the other
Offset is acceptable plus minus 15mv
I think this is correct 4.5mv over one (9mv over two) but that applies to a 37v board so I am not sure. It seems to share a lot with the Arcam alpha
Any help?
I am trying to check this amp before using or selling
The BIAS settings are elusive
As you can see from the pictures it has a Mike Creek 1995 main board (which says also used for A1 A2)
x2 capacitors 6800uf 35v
x4 wire wound resistors 0.22 ohm
Power transistors Motorola TIP2955 and 3055
The board runs at 33.5v dc
It works but sounds poor with one warm and one cool heatsink
BIAS is 4.5mv across x1 resistor for one channel and 1.5mv across the other
Offset is acceptable plus minus 15mv
I think this is correct 4.5mv over one (9mv over two) but that applies to a 37v board so I am not sure. It seems to share a lot with the Arcam alpha
Any help?
