Nottingham Ch=33 Series 2

Pacific (Brand) Various manufacturers

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  • Year
  • 1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 334965

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

 Technical Specifications

  • Number of Tubes
  • 8
  • Main principle
  • Superhet with RF-stage; ZF/IF 456 kHz; 3 AF stage(s)
  • Tuned circuits
  • 9 AM circuit(s)
  • Wave bands
  • Broadcast plus 2 Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 225-250 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: Nottingham Ch=33 [Series 2] - Pacific Brand Various
  • Shape
  • Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.
  • Notes

  • Advertised as an “8-valve all wave bander, All-Wave Metal Valve Receiver”.

    Superhet with RF stage and 3 stages of IF amplification.

    Bands: 550 – 1500 kHz
                  2.8 – 8.4 MHz
                  7.8 – 22 MHz

    The circuit of this model has been considerably revised based on the performance of the original version in the field. The major effect is to reduce the rather high noise level present on the original model due to excessive sensitivity.

    On the broadcast band, the biasing is so arranged that the radio-frequency valve functions as a high gain amplifier, while the IF amplifier has low gain only, thus assuring a minimum noise level on this band. On the shortwave bands, the IF amplifier is opened out to give maximum signal with effective automatic volume control.

    The first two IF transformers are air-cored with tapped-down secondaries, while the final transformer is iron-cored to give optimum diode performance.

    An interesting feature is the fact that on the highest frequency band the oscillator is tuned to a lower frequency than the RF circuits. This enables better tracking to be obtained, as will be noted by the absence of a padding condenser on this band. The line-up is carried out at the high-frequency end of the band only, and it is important that the necessary equipment is available for this purpose. The “image” of course, will appear at approximately one megacycle higher on the dial than the fundamental frequency.

    Chassis is also used in the Salisbury console version.

    See also the earlier chassis version, Series 1.

    Manufactured by Radio Corp NZ.

  • Price in first year of sale
  • 33.00 NZ £
  • Mentioned in
  • -- Original prospect or advert (Franklin Times 27 Nov 1936, Page 6.)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Service Bulletin No. 14, 2nd edition, August 1936)
  Service Bulletin No 14, 2nd Edition Aug 1936. 1556 KB
  • Documents regarding this model
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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