I'm cleaning house and have a couple old manual I thought you might want (I might have borrowed them from you :) HP 608A/B VHF Sig Gen Op and Service Tektronix Type 585 Oscilloscope Instruction Manual (original Tek blue manual) Tektronix Type 531 and Type 541 Oscilloscope Instruction Manuals (copies with some fold-out pages) 73, George, kc1v