VTG National Electronics Tube w/ sheath

 Shielded twin beam tetrode RF Amp 589a

this is nice. I do not know anything about these. Got these from company overstock sale

FREE SHIP

VTG National Electronics Tube w/ sheath  Shielded twin beam tetrode RF Amp 589a this is nice. I do not know anything about these. Got these from company overstock sale FREE SHIP