Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 28975
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to 4019A = SY4019A = S4019B = VT72_GPO = CV249 = 4609
Similar Tubes
Normally replaceable-slightly different:
Heater different:
Other base:
  4019B ; S4019A

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Technology / Measurement
Filament Vf 4 Volts / If 0.25 Ampere / Direct / Specified voltage AC/DC

Telephone repeater tube designed for DC series or parallel supply. Anode volts 130.

Dimensions (WHD)
incl. pins / tip
57 x 114 x mm / 2.24 x 4.49 x inch
Weight 65 g / 2.29 oz
Information source Saga of the Vacuum Tube, Tyne   page 369
- - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

4019a_so.png 4019A: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad

Collection of



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