8pcs. GU-50 Tubes Ulyanovsk Pentode Same Date OTK eq. Valve FU-50 / LS-50 NOS
GU-50 Generator Beam Pentode Tube. Russian tube generator beam pentode GU-50 used as a generator and amplifier of high-frequency oscillations at frequencies up to 120MHz. The GU-50 tube is used in transmitters, in low-frequency amplifiers.