There are no voltage readings on the ARC schematic, but you could check the voltage drop across the 1 K source resistor; it should be approximately equal. Unless you know someone fooled with it, I would not worry.
ARC LS25 mkII adjustment
Does anyone know the procedure to adjust the LS25 mkII preamp? I am considering swapping tubes with new ones and would like to know how to adjust the 2 trimmers that looks like sets the voltage for the tube bias.
I don't have any documentation on where to measure and what to set to. Anyone have any experience with this preamp?
I don't have any documentation on where to measure and what to set to. Anyone have any experience with this preamp?
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- 12 posts total
- 12 posts total