Ambassador 650H AC version

Ambassador (brand), R. N. Fitton Ltd.; Brighouse, Yorkshire

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  • Year
  • 1950
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 101494
    • Brand: Ambassador

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 420 kHz
  • Tuned circuits
  • 8 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 210; 230; 250 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • from Radiomuseum.org
  • Model: Ambassador 650H [AC version] - Ambassador brand, R. N. Fitton
  • Notes

  • This is the AC version with an isolating transformer, but using U series valves.

    There is also an AC/DC version.
    The A.C./D.C. chassis employs a Brimistor in the heater chain, and the dial lamps are 3.5 volt lamps wired in parallel with each other, in series with the negative mains lead and shunted by a 100 ohm resistor, which is in practice an isolated section of the ballast resistor.

  • Source of data
  • -- Original-techn. papers.
  • Author
  • Model page created by Peter Hoddow. See "Data change" for further contributors.

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