home en fr de <-- ^ -->

RCA Radiotron 8D21 Internally Water Cooled Dual Tetrode
Double tétrode à refroidissement interne par eau
Wassergekühlte Doppel-Tetrode

Used in early VHF TV transmitters.

Fiche technique • Data sheet • Datenblatt: 8D21.pdf

Documents:
Radiotron 8D21 in RADIOTRONICS No. 119 - May-June, 1946
The RCA 8D21 in RCA Broadcast News No. 48 - March, 1948
Duplex Tetrode UHF Power Tubes in Proceedings of the I.R.E. - November, 1948

Thanks to Charles Osborne for his help in acquiring this tube, and for providing documentation.

 

RCA Radiotron 8D21 Dual Tetrode

Hauteur • Height • Höhe : 305 mm • 12"
Diamètre de l'ampoule • Bulb diameter • Kolbendurchmesser : 102 mm • 12"

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

RCA Radiotron 8D21 Dual Tetrode

 


Le contenu de ce site est sous copyleft - The content of this site is under copyleft - Der Inhalt dieser Website steht unter Copyleft