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TUBE SUBSTITUTION handbook by The Howard W. Sams Engineering Staff HOWARD W. There are numerous occasions when a picture-tube substitute is necessary: This revised edition of Tube Substitution Handbook in- cludes over 1,400 more substitutes There are numerous occasions when a picture-tube substitute. Middleton's Receiving Tube Substitution Guidebook. It tells you how well the sub performs (exc, good, poor, etc), and gives required circuit mods if any.The information in the Sylvania Tube Substitution Manual is furnished without assuming booklet. (9) Unused elements should be tied to negative filament. Free Vacuum Tube Data Sheets Free Vacuum Tube Substitution Guide Manuals Free Radio Tube Data Manuals Free Tube Base Diagrams. In this tube substitution guide, wherever possible, only the newer tubes are suggested as replacements. While other substitutes may appear suitable, they have File Info : application/pdf, 100 Pages, 1.26MB TUBE SUBSTITUTION handbook by The Howard W. Sams Engineering Staff () I HOWARD W. SAMS & CO., INC. Tube substitution handbook. v. 1- by Howard W. Sams & Co., 1960 edition, in English. securing the needed tubes will be served. In the other substitution guides - Receiving. Tube Substitution. Guidebook, the four Supplements thereto, and the aU·