radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

300T

Information - Help 
ID = 16988
       
Country:
United States of America (USA)
Brand: Eimac (brand name)
Developer: Eimac (brand name) 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 300T
Predecessor Tubes 150T  
Successor Tubes 100T   35T   1500T   2000T   1000T  

Base Jumbo 4-pin bayonet (1918) (Codex=Bz) Sidecontact and top contact.
Was used by Transmittertube (Radio)
Filament Vf 8 Volts / If 11.5 Ampere / Direct
Description

The 150T was first Eimac tube, advertised in QST in 1934 and was exhibited at the ARRL Convention 1934 in Sacramento. After that the tube was produced in series.

Shortly after the 150T followed the 50T, 300T and 500T, later in the 30ies followed the 35T, 100T, 1500T and 2000T. The number is the plate dissipation a tube was made for. If a tube tested had far ecxceeded the original ratings, they were numbered higher: 50T = 100T, 150T = 250T, 300T = 450T, 500T = 750T but the 35T, 100T and 2000T retained their original numbers and ratings. Later a distinction with TL or HL followed. Thus the 35T, 100T, 250T, 450T and the 750T became the 35TL, 100TL, 250TL, 450TL and 750TL. 300T tubes were made with a top anode cap but some had wires instead of the cap.

 
Dimensions (WHD)
incl. pins / tip
x 292 x 120 mm / x 11.50 x 4.72 inch
Information source -- Collector info (Sammler)   
Tube Lore (II)   p. 202
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

300t_so.png 300T: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad
 
20200413_104758.jpg

 

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  

Data Compliance More Information