radiomuseum.org

8D21

Information - Aide 
ID = 25210
       
Pays:
Etats-Unis
Fabricant: RCA (RCA Victor Co. Inc.); New York (NY)
Type:  TRANSMITTING TUBE (general)   VHF 
  De 1925 à 1945 environ très rare
Identique à 8D21

Culot SPECIAL TUBEBASE in general Connexion au sommet par 2 tétons.
Chauffage Vf 3.2 Volt / If 125 Ampère / Direct / Specified voltage AC/DC
Description

Dual tetrode developed by RCA for television broadcasting.
Advertised in Electronics, February 1947, page 63.

The metal to glass seal used in this tube was originally invented by William G Housekeeper in 1922. Housekeeper worked at the Western Electric Co in Kearney, New Jersey at the time. His invention was known as the Housekeeper seal and was a key development, used in many later transmitting tubes

 
Texte dans d'autres langues (peut différer)
Bibliographie -- Original prospect or advert   

8d21_rca_sock_1.png 8D21: RCA TT
Götz Linss † 27.06.21

8d21_rca_tech1.png
8D21: RCA TT
Götz Linss † 27.06.21

Plus d'infos ...
 
8d21_rca_1.jpg

8D21
 

[rmxtube-fr, noindex]
  

Mentions légales Plus d'informations