I'm looking for the Orpheus / HEV 90 Instruction Manual- Anyone have a copy they can spare?
Will the digital copy do? Careful on how you download from that site. They do not make it clear what to do. First give it a star rating. Then click on the download in 1 hour and save to computer. Then read away in adobe acrobat
There are 2 screws on the bottom of the amp in the middle(in line with the volume control) that are counter sunk that hold the tube cage.
Do a search it may have been posted about biasing the amp.