FOR SALE: One good used EIMAC 4CX250F Tube in excellent shape... Will sell for $15.00 plus shipping. Two good used 4X150A Tubes in excellent shape... One RCA, One EIMAC Will sell the pair for $20.00 plus shipping. One new, unused 4X150A Tube... JAN - Made in USA. Will sell for $20.00 plus shipping. QTHR - Brian, AF4K