Filament Transformer

Ellison Manufacturing Co., Ltd.; Harrogate

Data
Forum
Pictures
Collections

  • Year
  • 1931 ?
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 357204

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 200 -250 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Special material, described in the notes.
  • from Radiomuseum.org
  • Model: Filament Transformer - Ellison Manufacturing Co., Ltd
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 3.375 x 5 x 4.375 inch / 86 x 127 x 111 mm
  • Notes

  • Ellison Filament Transformer

    There are probably many readers who have A.C. mains but whose sets use battery valves with an A.C. eliminator and wish to change to the more efficient A.C. valves. The necessary modification to the set can usually be carried out easily, but a filament transformer will be needed.

    The transformer is well-made and has a very substantial core and a neat terminal assembly on the top. Only two windings are provided, the primary tapped for voltages between 200 and 250, and a centre-tapped secondary winding giving 4 volts on load.

    On test, the transformer was quite satisfactory, with good regulation, as can be seen from the accompanying figures. The no-load power was 1.7 watts, giving an efficiency at full load of 93 percent. 

    Amps Volts
    0 4.25
    1 4.20
    2 4.15
    3 4.10
    4 4.05
    5 4.00
    6 3.95

     

  • Mentioned in
  • -- Original prospect or advert (Amateur Wireless Jun 27, 1931, Page 1006.)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum