I've read some reviews on these and it seem the big difference between the $36 100w and the $18 70w is the 100w is on 16v and the 70w is 13.8v.. The heat sink for either is $8.?? They both need an low pass filter for the band you use it on.? Some people say they cannot wait to retire.? It is great for the first 2 years but I retired in 2010 so I might just build the 70w version for 20m, my favorite band.??
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Lee - N9LO?
"I Void Warranties"
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Lee