[Amps] Newbie RF amp construction question

[dputnick at alumni.caltech.edu (Don Putnick)]

I'm taking on my first home-built amp. It's the Granberg Motorola EB104 
design (600W from four MRF150s; basic circuit looks like the Ameritron 
ALS-600). I've assembled kits before but don't have a clue about building a 
heat sink from scratch. How do I go about attaching the RF transistors to 
the PCB, copper spreader and aluminum heat sink?
Thanks. Don November-Alfa-Six-Zulu

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Don Putnick
dputnick@alumni.caltech.edu