Made in USA.
Muddy black plate. Great Dual Grid Power tube.
Glass type used as class A or B amplifier in many old radio equipment.
Class B operation ties grid one & two together. Class A operation ties grid 2 to plate.
Nos in original box. Matched pair are available.

Made in USA by RCA (1930).
Muddy black plate, balloon type, engrave base. Hard to find. Great Dual Grid Power tube.
Glass type used as class A or B amplifier in many old radio equipment.
Class B operation ties grid one & two together. Class A operation ties grid 2 to plate.
Nos in original box. Matched pair are available.

Made in USA by RCA (1930).
Muddy black plate in balloon type. Engrave base. Great Dual Grid Power tube.
Glass type used as class A or B amplifier in many old radio equipment.
Class B operation ties grid one & two together. Class A operation ties grid 2 to plate.
Used, Tested good.

Made in USA by Tung-Sol.
Muddy black plate. Great Dual Grid Power tube.
Glass type used as class A or B amplifier in many old radio equipment.
Class B operation ties grid one & two together. Class A operation ties grid 2 to plate.
Nos in original box. Matched pair are available.

Made in USA by Ken-Rad.

Black glass, Muddy black plates. UX5 pin type..

Nos inoriginal box. Matched pair are available.

Made in USA by RCA.
Muddy black plates. UX5 pin type.
Click here for the data.

Nos in original box. Matched pair are available.

Made in USA by National Union

Muddy black plates. UX5 pin type.

Nos in original box. Matched pair are available.

Made in USA by RCA.

Muddy black plate in balloon type. Engrave base.

Nos but no box, Tested very good. Matched pair are available.