I have the following input tubes that were used in Quicksilver and Joule-Electra preamps that I no longer own. Depending on model, possible applications in Modwright, Lamm, J-E, etc.Siemens 5814A: NOS from Tube World and never used. Metal container notes in Dutch. Tube dates from 1962. $50. Tube sold for $75GE GL 5814: Very nice condition. $20Sovtek 6H30pi: used but in good shape. $20(2) Sovtek 6C45pi: one is new; the other used. $20 and $15.
1 New pair of Sovtek 5U4G coke bottle shaped Rectifier tubes. $35 a pair.1 pair of used Sovtek 5U4G coke bottle shaped rectifier tubes less then 20hours on them $25 a pair.Lastly a pair of New NOS Soviet 5U3C / 5U4 / 5U4GB Winged 'C' Rectifier tube$25 a pairSovtek are the first two pictured. NOS Soviet 5U3C is bottom picture.