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.

 

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

 

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