Made in USA by RCA.
Muddy black plate, engrave base.
Nos in original box. Matched pair are available.
Made in USA by Tung-Sol (5-1945).
Black glass version.
Nos in original box. Matched pair are available.
Made in USA by National Union.
Silver plate. Engrave base.
Nos in original box.
Made in USA.
Remote cutoff tetrode with Mesh plate.
Substitutes ................................... 24A
Nos but no original box. Never been used
Made in USA by RCA.
Smoke glass, engrave base.
Nos in box. Matched pair are available.
Made in USA by Ken-Rad.
Half black glass, black plate.
This type is identical electrically with type 6F6.
Nos. Some in original box and some no box. Matched pair are available.
Made in USA by Ken-Rad.
Half black glass, black plate.
This type is identical electrically with type 6F6.
Used but test as nos tube. No box.
Matched pair and quad are available.
Made in USA.
Clear glass, black plate.
This type is identical electrically with type 6F6.
Nos in original box. Matched pair are available.
Made in USA by Sylvania.
Round black plate.
Nos in original box. Matched pair are available.
Made in USA by Sylvania.
Round black plate. Green leaf print
Nos in original box
