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 EICO Model HF-60 Hi-Fi Amplifier Operating and Construction Manual $9.99 Read more National NC-44 NC44 Radio Receiver Manual $5.99 Read more National NC-183 NC183 Radio Receiver Manual $11.99 Read more Fisher FM-1000 FM1000 Service Manual $7.99 Read more