Columbus Endeavour 90

Columbus (Brand); Radio Centre Ltd.; Wellington

Data
Forum
Pictures
Collections

  • Year
  • 1942–1948 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 338402

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 230 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 10 inch = 25.4 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Columbus Endeavour 90 - Columbus Brand; Radio Centre
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 24 x 14.5 x 11.5 inch / 610 x 368 x 292 mm
  • Notes

  •  

    7-Valve superhet with RF stage 5 band table model receiver.

    See also Consol Model 90 Convoy, Console Model 90 Escort, Console Model 90 Squadron, Console Radiogram Model 90 Continental, Console Radiogram Model 90 Caravel & Console Radiogram Model 90 Flotilla.

    Tone Control: The 11-position tone control, the 'Columbus Electronic Ear' as it was known, was an advanced solution to try and help the listener get the best listening experience based on what they were listening to. 

    Positions 1-5 are for distant stations and the radio is working with its full sensitivity.  This means the set could also be pulling in static and interference - as you move towards position 5 more and more of the high frequencies are cut out to compensate.

    Positions 6-8 are for fidelity between low and normal listening volumes - in any of these three positions the set would reduce its sensitivity and (according to Columbus sales literature) 'apply this extra power to achieve fidelity'.  These positions are designed to give the highest quality of faithful reproduction at the expense of distance-getting ability.  Position 8 is for listening at a normal volume, but as the volume reduces the highs and lows start to disappear due to the human ear being less sensitive to them at low levels, so positions 6 and 7 boost these to compensate.

    Positions 9-11 are the reduced treble settings for local station listening - designed to remove surface hiss from high fidelity transmissions (as music transmissions were primarily from records at this time).  It was noted that for studio broadcasts (live studio music) that this hiss did not occur so these settings should not be used in this case.

    Battery models of similar characteristics and identical appearance are available in Endeavour, Escort, Convoy & Squadron cabinet styles with vibrator operation from 6V battery (Model 96). 

    Manufactured by Radio Corporation of New Zealand Ltd for Columbus Radio Centre Ltd.

  • Price in first year of sale
  • 49.50 £
  • Mentioned in
  • -- Original prospect or advert (Gisborne Herald 28 September 1946 Page 10)
  • Author
  • Model page created by Brian Stevens. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum