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UV204_spherical

Informazioni - Aiuto 
ID = 18476
       
Stato:
USA (Stati Uniti d'America)
Produttore: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Progettista: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tipo:  Triodo trasmittente, raffr. ad aria   Power/Output 
Identico a UV204_spherical = C304
Valvole simili
Other shape (e.g. bulb type):
  UV204_cylindric
Prime serie 1921 Vintage Radio 1887-1929, Greenwood's Classic Pictorial Album
Prime informazioni
Apr.1921 : Saga of the Vacuum Tube, Tyne p.325 & 327
01.Sep.1921 : RCA Catalog
Zoccolo Pin-and-blade jumbo (3 contacts) Top contact with a cap.
Utilizzata per Transmittertube (Radio)
Filamento Vf 11 Volt / If 14.75 Ampere / Direct / Specified voltage AC/DC
Descrizione

This tube was developed at the G E laboratories in the spring of 1920 and the type number was assigned to it in November 1920. It was announced to the public in march 1921. Plate: 2000 V, 250 mA. Output 250 Watts. Amplification constant = 25.
Price in 1922: $ 110.-.
Middle part of the bulb is spherical, dia.5". later 204s have cylindrical glass.
Base-Special End Mountings: UT-501 and UT-502.
Error in Tyne, p.327: Fig.16-23 shows a single ended tube, not a UV204!

 
Dimensioni
(LxAxP)
incl.pins/tip		 127 x 361 x 127 mm / 5.00 x 14.21 x 5.00 inch
Peso 567 g / 20.00 oz
Bibliografia Tube Lore (II)   p. 29
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren   Robertson-Cataract Catalog #22 for 1922/23
-- Original-techn. papers.
Taschenbuch zum Röhren-Codex 1948/49
pin_and_blade_base_jumbo_triode~~8.png UV204_spherical: Fin Stewart
Fin Stewart

Just Qvigstad 		uv204_spec.png
UV204_spherical: Banneitz, TB der drahtl. Teleph. 1927
Anonimo 15 Collezionista

Collezione di

Robert Gillespie (USA)
 
uv204.jpg

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