i have a rm 100. it had el 34's in it, until it fried the 2 middle tubes. pulled the chassis out, it had a blown fuse, the 5x20 mm. 250v 8 amp fuse. there are 2 of these, one was blown the other was o.k. when the tubes blew i noticed kind of a burning smell. so i replaced the fuse, got 4 new...