Hi Guys i have a Heathkit SB-200, i just picked it up, it has soft start and a new fan inside, it also came with a extra fan for on top, i guess ?. what i am interested in is !! ... Do i Blow into or Suck out of the amp from the top with the extra fan. thanks P. George Yazzolino 14801 NE 20th Circle Vancouver, Wa. 98684 KC7HKP Grid CN-85