Up for sale is an exceptionally matched pair (2 pieces) of vintage Telefunken (TFK) EZ80 full-wave rectifier tubes, brand new in their original factory Telefunken boxes. Made in Germany, these desirable tubes feature internal long smooth grey plates, a top halo ring getter, and the iconic molded diamond bottom mark in the glass base between the pins. Highly sought after by audiophiles for their exceptional regulation, longevity, and smooth tonal balance in preamplifiers and vintage radio power supplies.

As shown, both tubes have been thoroughly tested on our laboratory-grade Amplitrex AT1000 tube tester. Forward emission current (FWD) and reverse leakage (REV) metrics for both internal diode sections are detailed in the table below.