• Country
• Great Britain (UK)

• Manufacturer / Brand
• Eddystone (Brand), Stratton and Co., Ltd., Eddystone Radio Ltd.; Birmingham

• Year
• 1971

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 115344

• Number of Transistors
• 36

• Semiconductors

• Main principle
• ZF/IF 25000/3000 kHz

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Line / Storage batteries (perhaps also batteries) / 100-125 / 200-250 / 12 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Noise Measuring Set 31A - Eddystone Brand, Stratton and

• Shape
• Tablemodel, with any shape - general.

• Notes
• VHF portable interference tracer and measurer, consisting of receiver covering 31-68 / 68-135 / 135-250 MHz in three separate tuners; AM,CW(BFO),FM;
  1 dB step attenuator with 110 dB range and high accuracy RF voltmeter.
  Internal rechargeable NiCd batteries and charger.
  Built to specification of British Post Office for interference tracing.
  Variant: 31A MkII with integrated IC amplifier and speaker.

• Mentioned in
• Eddystone User Group News Letter 32

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 255 models, 125 with images and 46 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Eddystone (Brand), Stratton and Co., Ltd., Eddystone Radio Ltd.; Birmingham