I have listed some videos which touch the subject of solid state amplifiers

Isolation Transformer and the performance with RF Power MOSFET

Click on watch on Youtube for more description in the right bottom corner

The Half Bridge Power Amplifier. Pros and Cons

Click on watch on Youtube for more description in the right bottom corner

Power Propagation and circuit Topologies, Part 1

Click on watch on Youtube for more description in the right bottom corner

Power Propagation and circuit Topologies, Part 2

Click on watch on Youtube for more description in the right bottom corner

The Modular Quadratron Board from Tantratron, Part 1

Click on watch on Youtube for more description in the right bottom corner

The Modular Quadratron Board from Tantratron, Part 2

Click on watch on Youtube for more description in the right bottom corner

The Modular Quadratron Board from Tantratron, Part 3. The Half Bridge Topology revisited

Click on watch on Youtube for more description in the right bottom corner