G3WOS six meter, DXpedition solid state amp, packed and ready to go!
I don’t think I could ever, hand on heart, recommend that anyone build a high power solid-state amplifier rather than one based on trusted triodes. However, if you read such excellent books such as the recently released ‘The VHF/UHF DX Book’ (DIR Publishing) you will read chapter and verse on actually how difficult it is even getting a valve based amplifier both acceptably linear and reliable. The secret is the same for both valve and transistor; more effort and expense is needed in building the protection circuitry and the power supply than the amplifier itself.