• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1950 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 207741

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

• Number of Tubes
• 5

• Valves / Tubes
• EF50 EBF2 ECH21 EZ2 EM4

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 110-245 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Calibrating Oscillator GM2885 - Philips; Eindhoven tubes

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 340 x 220 x 200 mm / 13.4 x 8.7 x 7.9 inch

• Notes
• The calibrating oscillator GM2885 is intended for use in measurements requiring precisely known frequencies between 50 kHz and 44 MHz. It is used inter alia for calibrating and checking the scales of band-spread receivers, for calibration work in laboratories, etc. High accuracy is ensured by a 1 MHz crystal oscillator, which precedes a selective amplifier having a frequency range of 6-22 MHz. Also incorporated in the unit is an auxiliary oscillator for a range of 0.5-1 MHz. By mixing the two oscillator frequencies, or their harmonics, signals are obtainable which are continuously variable between 50 kHz and 44 MHz.
  
  Eichoszillator mit 2 Oszillatoren: 1 MHz, quarzgesteuert und Hilfsoszillator 0,5...1 MHz. Liefert eine genaue Frequenz im Bereich von 50 kHz bis 44 MHz (Abweichung max. 100 Hz bei 1 MHz, max. 2 kHz bei 20 MHz), Modulation mit Netzfrequenz 30% intern oder 50 - 1000 Hz fremd möglich.

• Net weight (2.2 lb = 1 kg)
• 8.9 kg / 19 lb 9.7 oz (19.604 lb)

• Price in first year of sale
• 3,350.00 ATS

• Mentioned in
• Elektron Kalender 1950 (Österreich)

• Author
• Model page created by Markus Müllner. See "Data change" for further contributors.

• Other Models

• Here you find 5243 models, 4384 with images and 3445 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt