PX4 #tube OSRAM #BIG PLATE GREY #RIBBED FAT MILITARY OLD PRODUCTION #RE604 NOS one TUBE (1 piece= 1 tube) Direct Heater Triode (DHT) MONO PLATE NOS life & strong performances for Your equipment.

This is the same as RE604 made in Germany but Rarest version ...top emission tested as 36mA

box 4 tube valve lampe röhre tsf 진공관 真空管 HAM RADIO audio hi-end hi-fi diy POWER AMPLIFIER Pre-Amplifier Preamp Pri VINTAGE stereo SE Single Ended PP Push-Pull