1950 Sylvania Tube Substitution Manual Amp HAM RADIO $7.99 1950 Sylvania Tube Substitution Manual Amp HAM RADIO quantity Add to cart 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 Company the 600-Watt Transmitter HAM Manual $9.99 Add to cart NATIONAL HRO Communication Receiver Manual $10.49 Add to cart National NCX-5 NCX 5 Transceiver Manual $11.50 Add to cart EICO Model HF-60 Hi-Fi Amplifier Operating and Construction Manual $9.99 Add to cart