FOR SALE: EIMAC and AMPEREX TUBES, used. Filaments test OK. I have no sockets left for these. 4X150A QTY 2 4X250B QTY 7 No, they are not 4CX250Bs before you ask. I will sell these for $4.00 each plus shipping or all 9 for $32.00 plus shipping. 73s - Brian, AF4K