6A-6D
6AH8, 6DN6, 6BH7, 6DN3, 6DL3, 6BJ5, 6BW7, 6DV4, 6DA6, 6DK7B, 6BD7A Tube, 6bd7a /ebc81, 6DQ5MP, 6BY7/EF85, 6BX6 Tube, 6bx6/ef80, 6BM4, 6DQ6 Tube, Beam Power Amplifier, 6BQ6A / 6BQ6B / 6GW6, RCA, 6GW6/6DQ6B Tube 6DQ6B / 6GW6, Beam Power Amplifier, USA, 6AL5 Tube, 6al5w/5726, Twin Diode, 6AB8, 6BM6/6BL6 Tube, mfg: us, 6135 Tube, Medium Mu Triode, 6C4 / 6135 (5 Star), GE, 6CD6G Tube, 6cd6g /6dn6, Beam Power Amplifier
