[Amps] 160-6m amp designs?

[steve d]

I have been looking around at tubes and I found some GS-35b's for  cheap. What does everyone think of these? There seem to be a lot of amp  designs for them. Are they good? decent? or just a junky way to get  power? HIHIHI
  
  How about a pair of 3-500z's or 3cx800's? 
  
  Steve, KC8QVO
  
  
       
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