Don't let this happen to your 6146 final tube or tubes. Replace this elusive faulty capacitor that causes extremely high voltage and destroys the tubes (valves). The kit includes a ceramic replacement capacitor and pictorial instructions on how to locate the elusive component. Moreover, this fault can also destroy the main transformer in your set. when it goes short circuit you will have no warning only a blown fuse and maybe a melted tube. This is a common fault but this simple procedure will protect the entire transceiver that once was the flagship of Yaesu sets. 73's Dave GW8 THL