1950 Sylvania Tube Substitution Manual Amp HAM RADIO Sorry, this product cannot be purchased. $7.99 Category: Sylvania Tags: Amplifier, Hi-Fi Amplifier, manual, Sylvania, Tube Manual, Vacuum Tube Description Description For sale is reprint 1950 Sylvania Tube Substitution Manual. Manual is 39 pages long, Includes Substitutions charts for 150Ma, 300Ma, transformer and Auto tubes, Television tubes and Picture Tubes. Related products Fisher FM-1000 FM1000 Service Manual $7.99 Read more Lafayette HA230 HA-230 Communications Receiver Operating Manual $9.99 Read more Lafayette HA226 HA-226 Communications Receiver Operating Manual $8.99 Read more H.H. Scott Stereo Amplifier 200B LK-30 Operating Manual $9.50 Read more