I need booster assembly help

[v.bolongaita]

I'm assembling a booster the one that uses input and output transformers and two mj2955 transistors. I bought a 100watts output transformer, but the diagram I have uses only 2 transistors. I have heard that when the output goes up to 100 watts the number of transistors must be increased to four and increased further to 6 for those that goes 150 watts. Please help a total beginner hobbyist. Please send me circuit diagrams of boosters that use both 4 transistors and 6 transistors. Send to email address v.bolongaita@gmail.com