Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 25389
United States of America (USA)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   Audio Frequency 
Identical to 101F = CV2553
Similar Tubes
Normally replaceable-slightly different:
First Source (s)
1927 : Saga of the Vacuum Tube, Tyne
Predecessor Tubes 101D  
Successor Tubes 440A_WE  

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Vf 4 Volts / If 0.5 Ampere / Direct / Battery =

"half-ampere L tube", used in the newly developed telephone repeaters. The 101D which had the 4 volt / .5 amp filament was redesigned around the filament: anode completely enclosed, grid as a continuously wound flattened spiral, and greatly reduced spacing between the elements.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
58 x 107 x mm / 2.28 x 4.21 x inch
Weight 51 g / 1.80 oz
Tube prices 7 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   p.283 ff.

101f_sockel.png 101F: nach Western Electric 1939
Robert Schmalstieg

More ...

Just Qvigstad
101F: KoBi
Konrad Birkner † 12.08.2014

More ...

Collection of




Filament Voltage = 4.0 to 4.2 V, NOT 5.0 V

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]