In your other post, you said you wanted a 100mhz amplifier, I presume that you need an amplifier running at 10^9 faster than this, i.e. 100MHz.
What power do you want?
Valves would be easier to use than transistors but are lethal.
In the US, the ARRL publish a handbook which gives details of amplifiers.
In the UK, the RSGB publish a handbook also.
Get one of these and study the cicuitry.