Marshall Schematics - Tube amp Schematics 202 rowsThe Tube amp Library of information Click the link above for Tube amp info, Schematics, Board building information, Projects, Mods, Transformer diagrams, Photo's, Sound clips. There are hundreds of pages of Tube amp information on my library page. Please visit my Tube Amplifier Forum Here's the place you can go to ask tube amplifier questions.#MARSHALL SCHEMATICS - FILE SIZE1Marshall_100w - 173 Kb2Marshall_100w_200w_pa_1968 - 326 Kb3Marshall_100w_3210 - 288 Kb4Marshall_150w_3315_5150 - 308 KbSee all 202 rows on el34world Marshall Amp Schematics - wwwubestore Marshall Amp Schematics - wwwubestore ; Marshall Schematics. Do you have a Marshall Guitar or bass tube amp that needs repair or modifications? Here you will find our collection of Marshall schematics. All of these PDF files are available for free download.