1950 Sylvania Tube Substitution Manual Amp HAM RADIO $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 National NC-300 NC300 Radio Receiver Manual $10.49 Read more National NCL-2000 NCL 2000 Linear Amplifier Manual $10.49 Read more Sylvania 219 220 Tube Test Data Book $11.99 Read more National Company the 600-Watt Transmitter HAM Manual $9.99 Read more