This is an original RCA Radiotron 6U8A Medium-Mu Triode, Sharp-Cutoff Pentode electron tube. This tube useable in VHF television and FM receivers. A Medium-Mu triode can be used for many other special purpose circuits like oscillators and RF amplifiers. Excellent for antique radio or television restoration projects, circuit research or to set up a private vacuum tube museum. It is a NOS tube - New Old Stock, unused, boxed, excellent condition.