-40%
1950+/- Hytron USN-3D21A 3D21-A Beam Power amp tube-Hickok TV7B tests@ 48,min:26
1950+/- Hytron USN-3D21A 3D21-A Beam Power amp tube-Hickok TV7B tests@ 48,min:26
1950+/- Hytron USN-3D21A 3D21-A Beam Power amp tube-Hickok TV7B tests@ 48,min:26

1950+/- Hytron USN-3D21A 3D21-A Beam Power amp tube-Hickok TV7B tests@ 48,min:26

$ 9.77

  • Brand: Hytron
  • Country/Region of Manufacture: United States
  • Seller Notes: “Good looking 'ST' tube, no original carton, so selliing as low hours used tube”
  • Type: USN-CHY-3D21A

Description

*Fantastic Tubes !!! * One tube, circa 1950+/- , U.S.A made by Hytron , military qualified type USN-CHY-3D21A vacuum tube as pictured . Condition: Good looking 'ST' tube, no original carton, so selliing as low hours used tube Date Code: n/a Tube features black plate and a bottom mounted 'rectangular' getter construction. * Hickok TV-7B/U * tested @ 48 min acceptable value for a good tube: 26 * Hickok TV-7B/U is a mutual conductance (Gm) type tube tester. It does check for mutual conductance which is a more accurate measure of tube's age. Satisfaction Guaranteed! *Fantastic Tubes !!!