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304L

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ID = 16990
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Transmitting Triode, air cooled 
Identical to 304L
Similar Tubes
Normally replaceable-slightly different:
  304TL
Other characteristic (electr. data):
  304H

Base Large 4 pin Bayonet Sidecontact and top contact.
Filament Vf 10 Volts / If 26 Ampere
Description

The HK-304L is a 300 watt general purpose triode with a mu of 10 made by paralleling four 75 watt tubes in one envelope. They were used extensively in WWII as pulse tubes and amplifiers. Although they have the same military number as the EIMAC 304TL they differ in the height of the tube so they are not always switchable. All the grid connections came through the glass and were terminated with a metal ring and grid cap. Some had two grid caps. HK also made this tube in the higher mu version the HK-304H.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   

Collection of

 
20200408_233630.jpg

304L
 

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