A service manual which fully explains how to bias the SE-40 with diagrams and pictures is available on the Golden Tube forum at Yahoo groups.
It's slightly tricky given it's a common cathode amp the bias of one tube affect the others. Biasing must be done in a specific sequence.
http://groups.yahoo.com/neo/groups/golden_tube/
-David
It's slightly tricky given it's a common cathode amp the bias of one tube affect the others. Biasing must be done in a specific sequence.
http://groups.yahoo.com/neo/groups/golden_tube/
-David